Data for: Techno-economic and environmental assessment of converting mixed prairie to renewable natural gas with co-product hydroxycinnamic acid, Iowa, USA, 2022-2023.

Author(s): Katherine Wild, Elmin Rahic, Lisa Schulte Moore, Mark Mba Wright

Abstract:

This dataset compiles model outputs, parameter sets, and documentation supporting a techno‑economic analysis (TEA) and life‑cycle assessment (LCA) of co‑digesting beef cattle manure with pretreated mixed prairie biomass to produce renewable natural gas (RNG), with hydroxycinnamic acids (HCA) and digestate‑derived biochar co‑products. It accompanies the study by Katherine Wild, Elmin Rahic, Lisa A Schulte Moore, and Mark Mba Wright "Techno-economic and environmental assessment of converting mixed prairie to renewable natural gas with co-product hydroxycinnamic acid," in Biofuels, Bioproducts, & Biorefining, 2024. The integrated simulation and assessment framework quantifies process performance, economics, and greenhouse‑gas intensity across five scenarios representing combinations of alkaline‑ethanol pretreatment for HCA extraction, liquid recirculation fractions, and biochar addition. This data collection includes: stream‑level mass flow/composition tables for each scenario; RNG, biochar, and HCA annual production summaries; literature‑based methane/biogas yield benchmarks; equipment‑level capital costs; TEA assumptions; emission‑factor inventories and displacement credits; and full sensitivity/uncertainty matrices for MFSP and GWP.

Funder: USDA NIFA

Award Number: 2020-68012-31824, 2023-68016- 40133, 2023-79000-38973

Keywords:

anaerobic digestion, biochar, biorefinery, co-digestion, energy, global warming potential, life cycle assessment, minimum fuel selling price, prairie biomass, renewable natural gas, techno-economic analysis

Project (Abbreviated name):

G2G_Mba_Wright_hydroxycinnamic_acids_TEA_LCA

Team: Grass2Gas

Geographic Location:

The state of Iowa.

Families:

Bovidae, Poaceae

Species:

Bos taurus, Zea mays

Full Metadata:

G2G_Mba_Wright_hydroxycinnamic_acids_TEA_LCA metadata v1.0.pdf (386.1 KB)

Data Mirror:

EDI repository

Data Table Column Names and Descriptions

Table name	Column name	Data type	Units	Column description
data.dataset RNG biochar HCA production	Biochar t per year	float	tonnePerYear	Annual production of biochar, in tonnes/year. Derived from modeled mass flows in the biochar scenario (biochar_scenario, dryer).
data.dataset RNG biochar HCA production	Hydroxycinnamic acid t per year	float	tonnePerYear	Annual production of hydroxycinnamic acid (HCA), in tonnes/year. Only nonzero in scenarios with HCA extraction (hca_main, pretreatment_scenario).
data.dataset RNG biochar HCA production	Renewable natural gas 1000 GJ per year	float	NA	Annual production of renewable natural gas (RNG), in 1,000 GJ/year. Calculated from modeled methane output and energy content (see _tea, RYield).
data.dataset RNG biochar HCA production	Scenarios	string	NA	The sequence of processing steps being investigated.
data.dataset RNG biochar HCA production	dataset RNG biochar HCA production pkey	float	dimensionless	A unique primary key for this table.
data.dataset TEA economic assumptions	Input value	float	NA	The value of the parameter used for the analysis, in the units indicated.
data.dataset TEA economic assumptions	Parameters	string	NA	Parameter used in the techno-economic analysis, with associated units.
data.dataset TEA economic assumptions	dataset TEA economic assumptions pkey	integer	dimensionless	A unique primary key for this table.
data.dataset assigned prices	Feedstock or chemical	string	NA	The feedstock, chemical or product used in the techno-economic analysis with units.
data.dataset assigned prices	Price	float	NA	The price of the feedstock or chemical in the units indicated.
data.dataset assigned prices	dataset assigned prices pkey	integer	dimensionless	A unique primary key for this table.
data.dataset digestate derived biochar	AD feedstocks	string	NA	The feedstocks fed to the anaerobic digester in the listed publication.
data.dataset digestate derived biochar	Biochar yield percent wt	float	percent	The yield of biochar expressed as a percent conversion from digestate, by weight.
data.dataset digestate derived biochar	Post pyrolysis fixed carbon	string	NA	The fixed carbon in the biochar after pyrolosis in the listed publication.
data.dataset digestate derived biochar	Post pyrolysis nitrogen	string	NA	The nitrogen in the digestate prior to pyrolosis in the listed publication.
data.dataset digestate derived biochar	Pre pyrolysis fixed carbon	string	NA	The fixed carbon in the digestate prior to pyrolosis in the listed publication.
data.dataset digestate derived biochar	Pre pyrolysis nitrogen	string	NA	The nitrogen in the digestate prior to pyrolosis in the listed publication.
data.dataset digestate derived biochar	Pyrolysis properties T at maximum time	string	NA	The temperature and length of pyrolysis in the listed publication.
data.dataset digestate derived biochar	Reference	string	NA	The publication in which this data was listed.
data.dataset digestate derived biochar	dataset digestate derived biochar pkey	integer	dimensionless	A unique primary key for this table.
data.dataset emission factors	Emission factor	float	NA	The emission factor of the material in carbon dioxide-equivalent kilograms per kilogram material. All units are CO2e kg kg-1.
data.dataset emission factors	Material	string	NA	An input or co-product material.
data.dataset emission factors	Reference	string	NA	The publication in which this data was listed.
data.dataset emission factors	dataset emission factors pkey	integer	dimensionless	A unique primary key for this table.
data.dataset equipment costs	Control	float	NA	Cost for this equipment under this scenario.
data.dataset equipment costs	Equipment	string	NA	Human-readable equipment label with shorthand in parentheses.
data.dataset equipment costs	Pre25HCA	float	NA	Cost for this equipment under this scenario.
data.dataset equipment costs	Pre50HCA	float	NA	Cost for this equipment under this scenario.
data.dataset equipment costs	PreBHCA	float	NA	Cost for this equipment under this scenario.
data.dataset equipment costs	PreHCA	float	NA	Cost for this equipment under this scenario.
data.dataset equipment costs	dataset equipment costs pkey	integer	dimensionless	A unique primary key for this table.
data.dataset feedstock composition	Beef cattle manure	float	NA	The value of the feedstock property and units indicated in the "Feedstock_composition" column for manure.
data.dataset feedstock composition	Feedstock composition	string	NA	The feedstock property and units being measured. Values appear in "Prairie_biomass" and "Beef_cattle_manure" columns.
data.dataset feedstock composition	Prairie biomass	float	NA	The value of the feedstock property and units indicated in the "Feedstock_composition" column for prairie biomass.
data.dataset feedstock composition	Source	string	NA	The published source of the values.
data.dataset feedstock composition	dataset feedstock composition pkey	integer	dimensionless	A unique primary key for this table.
data.dataset global warming potential sensitivity	Base	float	NA	Baseline net GWP intensity for the scenario. Same across the two rows (±20%) within a scenario.
data.dataset global warming potential sensitivity	CH4 Leak EF	float	NA	GWP change under ±20% change to CH4 leak emissions factor. May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	CO2 Biochar Application EF	float	NA	GWP intensity under ±20% change to the CO2 emissions attributed to bichar application (soil carbon stabalization pathway).
data.dataset global warming potential sensitivity	CO2 Digestate Application EF	float	NA	GWP intensity under ±20% change to the CO2 emissions attributed to digestate land application.
data.dataset global warming potential sensitivity	Cattle 5000	float	NA	Resulting GWP intensity when the herd size parameter is perturbed (±20%) around the 5,000 head base assumption (used in the process model). May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	Cattle 5000 Head	float	NA	GWP intensity when the herd size parameter is perturbed (±20%) around the 5,000 head base assumption (used in the process model). May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	Electricity EF	float	NA	GWP intensity under ±20% change to the grid electricity emissions factor.
data.dataset global warming potential sensitivity	Ethanol EF	float	NA	GWP intensity under ±20% change to the ethanol emissions factor (used in pretreatment).
data.dataset global warming potential sensitivity	HCA Displacement EF	float	NA	GWP intensity under ±20% change to the HCA displacement emissions factor. Credit from co-product HCA displacing external production. Populated for pretreatment scenarios only.
data.dataset global warming potential sensitivity	KOH EF	float	NA	GWP intensity under ±20% change to the KOH emissions factor.
data.dataset global warming potential sensitivity	MEA EF	float	NA	GWP intensity under ±20% change to the monoethanolamine (used in CO2 absorption) emissions factor.
data.dataset global warming potential sensitivity	Manure EF	float	NA	GWP intensity under ±20% change to the manure emissions factor.
data.dataset global warming potential sensitivity	Methane Leakage EF	float	NA	GWP intensity under ±20% change to the methane leakage emissions factor. May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	N Fertilizer Displacement EF	float	NA	GWP intensity under ±20% change to the synthetic nitrogen fertilizer displacement emissions factor.
data.dataset global warming potential sensitivity	N2O Biochar per Digestate Application EF	float	NA	GWP intensity under ±20% change to the N2O emissons for biochar vs. digestate application.
data.dataset global warming potential sensitivity	Natural Gas Avoided EF	float	NA	GWP change under ±20% change to avoided natural gas emissions factor credit when biogas displaces fossil NG (combustion/utility substitution).
data.dataset global warming potential sensitivity	Natural Gas EF	float	NA	GWP change under ±20% change to natural gas emissions factor used for upstream energy sources.
data.dataset global warming potential sensitivity	PB to M Ratio 2	float	NA	GWP intensity when the prairie biomass:manure ratio (mass/VS basis) is perturbed ±20% from the base 2:1 ratio. May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	PB to M ratio 2	float	NA	Resulting GWP intensity when the prairie biomass:manure ratio (mass/VS basis) is perturbed ±20% from the base 2:1. May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	Parameter Values	string	NA	Sensitivity setting applied uniformly to the single perturbed parameter in each column of this row.
data.dataset global warming potential sensitivity	Prairie Biomass EF	float	NA	GWP intensity under ±20% change to the prairie biomass emissions factor.
data.dataset global warming potential sensitivity	RNG Yield Volume Basis	float	NA	GWP intensity under ±20% change to volumetric RNG yield (e.g., CHâ‚„ volume basis). May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	RNG Yield kg per kg	float	NA	GWP intensity under ±20% change to massâ€‘based RNG yield (kg RNG per kg feed/VS). May be calculated differently than similarly named column, see _uncertainty.py or _lca.py.
data.dataset global warming potential sensitivity	Scenario	string	NA	The sequence of processing steps being investigated.
data.dataset global warming potential sensitivity	dataset global warming potential sensitivity pkey	integer	dimensionless	A unique primary key for this table.
data.dataset global warming potential uncertainty	Biochar Price 20 dollars per t	float	NA	Sampled Biochar price with a baseline of $0.02/kg (conversion of $20/t). If a Biochar stream exists, this is assigned.
data.dataset global warming potential uncertainty	CH4 Leak	float	NA	Methane leakage emissions factor. Baseline 1.0; ±20%; dimensionless factor used with 3% leakage x 27 CO2e/CH4 in the LCA.
data.dataset global warming potential uncertainty	CO2 Biochar Application	float	NA	CO2 biochar application emissions factor. Baseline 1.0; ±20%; coefficient controlling the biochar-application carbon term.
data.dataset global warming potential uncertainty	CO2 Digestate Application	float	NA	CO2‚‚ digestate application emissions factor. Baseline 1.0; ±20%; coefficient used in digestate-application carbon accounting.
data.dataset global warming potential uncertainty	CO2 Pyrolysis	float	NA	CO2‚ pyrolysis emissions factor. Baseline 1.0; ±20%; coefficient feeding the pyrolysis CO2‚ logic (biogenic CO2‚ is set to 0 in get_lca2).
data.dataset global warming potential uncertainty	CO2 Vented	float	NA	CO2‚ venting emissions factor. Baseline 1.0; ±20%; placeholder coefficient for vented CO2; not used by get_lca2 in the current code path.
data.dataset global warming potential uncertainty	Cattle 5000 Head	float	number	Scenario parameter for herd size used to derive manure availability, with 5000 head as the baseline. It provides context for the manure input stream (InFeed). The baseline manure production is calculated upstream as manure_prod = cow_amt * cow_prod / 24 (kg/hr). Although the uncertainty run does not sample cow_amt, this value underpins the baseline flows that are subsequently perturbed (e.g., PG flow scalar, RNG CH4 flow scalar).
data.dataset global warming potential uncertainty	Ethanol	float	NA	Ethanol emissions factor. Baseline 1.473681; ±20%; kg CO2e/kg ethanol.
data.dataset global warming potential uncertainty	Ethanol Price 0 58 dollars per L	float	NA	The unit price of ethanol used as a feedstock or process input in the modeled system. Baseline $0.58/liter.
data.dataset global warming potential uncertainty	GWP	float	NA	Computed as the sum of contributions returned by get_lca2(system, emission_factors). The HHV basis is enforced because get_lca2 divides by rng = (kg RNG/hr) x 52.5 MJ/kg.
data.dataset global warming potential uncertainty	HCA Displacement	float	NA	HCA displacement emissions factor. Baseline -0.658; ±20%; kg CO2e/kg RNG (credit).
data.dataset global warming potential uncertainty	HCA Price 4 and 8 dollars per kg	float	NA	Sampled HCA unit price with a baseline of $6/kg. If an HCA stream exists, the sampled value is assigned to it.
data.dataset global warming potential uncertainty	IRR 5 percent	float	NA	Sampled internal rate of return with a baseline at 5%. Assigned to tea.IRR.
data.dataset global warming potential uncertainty	KOH	float	NA	KOH emissions factor. Baseline 1.795859; ±20%; kg CO2e/kg KOH.
data.dataset global warming potential uncertainty	MEA	float	NA	MEA emissions factor. Baseline 2.799299; ±20%; kg CO2e/kg MEA.
data.dataset global warming potential uncertainty	Manure	float	NA	Manure emissions factor. Baseline -0.0741; ±20%; kg CO2e/kg manure (credit).
data.dataset global warming potential uncertainty	Manure Price 30 dollars per t	float	NA	Sampled manure price with a baseline of $0.03/kg (conversion from $/t). Assigns to stream InFeed.
data.dataset global warming potential uncertainty	N Fertilizer Displacement	float	NA	Synthetic nitrogen fertilizer displacement emissions factor. Baseline -2.7927; ±20%; kg CO2e/kg conventional fertilizer N (credit).
data.dataset global warming potential uncertainty	N2O Biochar Digestate Application	float	NA	N2O biochar emissions factor. Baseline 1.0; ±20%; N to N2O factor used to compute N2O emissions from digestate/biochar application.
data.dataset global warming potential uncertainty	Natural Gas	float	NA	An emission's factor input representing the GHG intensity of purchased natural gas used for process energy (analogous to how the code treats "Electricity" as an emission factor). Positive values contribute emissions.
data.dataset global warming potential uncertainty	Natural Gas Avoided	float	NA	An emission's factor credit for avoided natural gas, i.e., negative (credit) values reflecting displacement of NG due to produced RNG or process integration.
data.dataset global warming potential uncertainty	Natural Gas Price 2 40 dollars per GJ	float	NA	The unit price of purchased natural gas used for process energy in the modeled system. Baseline 2.40 dollars per giga joule.
data.dataset global warming potential uncertainty	PB to M Ratio 2	float	NA	Not a ratio in the file. The code multiplies the baseline PGMakeup mass flow (kg/hr) by the sampled 0.8-1.2 scalar and writes the resulting PG flow (kg/hr).
data.dataset global warming potential uncertainty	Prairie Biomass	float	NA	Prairie biomass emissions factor. Baseline 0.046291; sampled ±20%; kg CO2e/kg PG.
data.dataset global warming potential uncertainty	Prairie Biomass Price 105 dollars per t	float	NA	Sampled Prairie Grass price as $0.105/kg (conversion from $/t). Assigns to stream PGMakeup.
data.dataset global warming potential uncertainty	RNG Yield Volume Basis	float	NA	Not a kg/kg yield in the file. It scales the baseline CHâ‚„ mass in stream RNG by 0.8-1.2 and writes CH4 mass flow (kg/hr).
data.dataset global warming potential uncertainty	Scenario	string	NA	The sequence of processing steps being investigated.
data.dataset global warming potential uncertainty	dataset global warming potential uncertainty pkey	integer	dimensionless	A unique primary key for this table.
data.dataset literature biogas methane production	Biogas production mL per gVS	float	NA	Estimated raw biogas production presented as milliliters biogas per grams volatile solid fed to the digester.
data.dataset literature biogas methane production	CH4 production mL per gVS	float	NA	Estimated methane production presented as milliliters methane per grams volatile solid fed to the digester.
data.dataset literature biogas methane production	Scenario or feedstock	string	NA	Published estimates of biogas and methane yields for scenarios of interest and other feedstocks in anerobic digestion systems. Each row represents published estimates for one scenario or feedstock in one paper.
data.dataset literature biogas methane production	Source	string	NA	The paper in which the estimates were published.
data.dataset literature biogas methane production	dataset literature biogas methane production pkey	integer	dimensionless	A unique primary key for this table.
data.dataset minimum fuel selling price costs	Control	float	NA	Contribution of this cost/credit to the MFSP in the Control scenario (in $/GJ).
data.dataset minimum fuel selling price costs	Cost	string	NA	Name of the cost/credit category.
data.dataset minimum fuel selling price costs	Pre25HCA	float	NA	Contribution of this cost/credit to the MFSP in the Pre25HCA scenario (in $/GJ).
data.dataset minimum fuel selling price costs	Pre50HCA	float	NA	Contribution of this cost/credit to the MFSP in the Pre50HCA scenario (in $/GJ).
data.dataset minimum fuel selling price costs	PreBHCA	float	NA	Contribution of this cost/credit to the MFSP in the PreHBHCA scenario (in $/GJ).
data.dataset minimum fuel selling price costs	PreHCA	float	NA	Contribution of this cost/credit to the MFSP in the PreHCA scenario (in $/GJ).
data.dataset minimum fuel selling price costs	dataset minimum fuel selling price costs pkey	integer	dimensionless	A unique primary key for this table.
data.dataset minimum fuel selling price sensitivity	Base	float	NA	Baseline Minimum Fuel Selling Price (MFSP) for the scenario.
data.dataset minimum fuel selling price sensitivity	Biochar Price 200 Dollars per t	float	NA	MFSP when the biochar price is perturbed by ±20% from $200/ton.
data.dataset minimum fuel selling price sensitivity	Cattle 5000 Head	float	NA	MFSP when the cattle herd size (used to determine manure supply) is perturbed by ±20% from the 5000 herd head size baseline.
data.dataset minimum fuel selling price sensitivity	Ethanol Price 0 58 Dollars per L	float	NA	MFSP when the ethanol price is perturbed by ±20% from $0.58/L.
data.dataset minimum fuel selling price sensitivity	HCA Price 4 and 8 Dollars per kg	float	NA	MFSP when the HCA price is perturbed by ±20% from $6/kg.
data.dataset minimum fuel selling price sensitivity	IRR 5 Percent	float	NA	MFSP when the internal rate of return (IRR) is perturbed by ±20% from 5%.
data.dataset minimum fuel selling price sensitivity	Manure Price 30 Dollars per t	float	NA	MFSP when the manure price is perturbed by ±20% from $30/ton.
data.dataset minimum fuel selling price sensitivity	Natural Gas Price 2 40 Dollars per GJ	float	NA	MFSP when the natural gas price is perturbed by ±20% from $2.40/GJ.
data.dataset minimum fuel selling price sensitivity	PB to M Ratio 2	float	NA	MFSP when the prairie biomass:manure ratio (mass/VS basis) is perturbed ±20% from 2:1 kg/hr.
data.dataset minimum fuel selling price sensitivity	Parameter Values	string	NA	Indicates the sensitivity direction: -20% or +20% perturbation of the parameter.
data.dataset minimum fuel selling price sensitivity	Prairie Biomass Price 105 Dollars per t	float	NA	MFSP when the prairie biomass price is perturbed by ±20% from $105/ton.
data.dataset minimum fuel selling price sensitivity	RNG Yield Volume Basis	float	NA	MFSP when the RNG yield (volume basis) is perturbed by ±20% from baseline.
data.dataset minimum fuel selling price sensitivity	Scenario	string	NA	The sequence of processing steps being investigated.
data.dataset minimum fuel selling price sensitivity	dataset minimum fuel selling price sensitivity pkey	integer	dimensionless	A unique primary key for this table.
data.dataset minimum fuel selling price uncertainty	Biochar Price 20 dollars per t	float	NA	Biochar price baseline $0.02/kg (conversion of $20/t).
data.dataset minimum fuel selling price uncertainty	Cattle 5000 Head	float	number	Number of cattle considered in the system boundary.
data.dataset minimum fuel selling price uncertainty	Ethanol Price 0 58 dollars per L	float	NA	The unit price of ethanol used as a feedstock or process input in the modeled system. Baseline $0.58/L.
data.dataset minimum fuel selling price uncertainty	HCA Price 4 and 8 dollars per kg	float	NA	The unit price of HCA. Baseline $6/kg.
data.dataset minimum fuel selling price uncertainty	IRR 5 percent	float	NA	Internal rate of return, baseline 5%.
data.dataset minimum fuel selling price uncertainty	MSP dollars per kg	float	NA	Minimum Selling Price of the RNG in dollars per kg.
data.dataset minimum fuel selling price uncertainty	Manure Price 30 dollars per t	float	NA	Manure price with a baseline of $0.03/kg, converted from $/t.
data.dataset minimum fuel selling price uncertainty	Natural Gas Price 2 40 dollars per GJ	float	NA	The unit price of purchased natural gas used for process energy in the modeled system. Baseline 2.40 dollars per giga joule.
data.dataset minimum fuel selling price uncertainty	PB to M Ratio 2	float	NA	Not a ratio in the file. The code multiplies the baseline PGMakeup mass flow (kg/hr) by the sampled 0.8-1.2 scalar and writes the resulting PG flow (kg/hr).
data.dataset minimum fuel selling price uncertainty	Prairie Biomass Price 105 dollars per t	float	NA	Prairie biomass price baseline $0.105/kg, converted from $/t.
data.dataset minimum fuel selling price uncertainty	RNG Yield Volume Basis	float	NA	Not a kg/kg yield in the file. It scales the baseline CH4 mass in stream RNG by 0.8-1.2 and writes CH4 mass flow (kg/hr).
data.dataset minimum fuel selling price uncertainty	Scenario	string	NA	The sequence of processing steps being investigated.
data.dataset minimum fuel selling price uncertainty	dataset minimum fuel selling price uncertainty pkey	integer	dimensionless	A unique primary key for this table.
data.dataset process model biogas methane output	biogas produced	float	NA	The biogas output for this simulated scenario in cubic meters per hour.
data.dataset process model biogas methane output	ch4 produced	float	NA	The methane output for this simulated scenario in cubic meters per hour.
data.dataset process model biogas methane output	dataset process model biogas methane output pkey	float	dimensionless	A unique primary key for this table.
data.dataset process model biogas methane output	scenario	string	NA	The experimental process and results of Rahic et al., where prairie biomass and beef cattle manure were co-digested under five combinations of pretreatment and AD processes. All scenarios produced RNG and digestate-derived biochar and all pretreatment scenarios produced HCA.
data.process results raw	CH4 Percent Mass Basis	float	percent	Methane (CH4) mass fraction (% w/w). Percentage of methane in the stream, by mass.
data.process results raw	CO2 Percent Mass Basis	float	percent	Carbon dioxide (CO2) mass fraction (% w/w). Percentage of carbon dioxide in the stream, by mass.
data.process results raw	Ethanol Percent Mass Basis	float	percent	Ethanol mass fraction (% w/w). Percentage of ethanol in the stream, by mass. Ethanol is used in the alkaline pretreatment solution.
data.process results raw	Glucose Percent Mass Basis	float	percent	Glucose mass fraction (% w/w). Percentage of glucose in the stream, by mass. Represents soluble sugars from biomass or manure.
data.process results raw	H2O Percent Mass Basis	float	percent	Water (H2O) mass fraction (% w/w). Percentage of water in the stream, by mass.
data.process results raw	KOH Percent Mass Basis	float	percent	Potassium hydroxide (KOH) mass fraction (% w/w). Percentage of KOH in the stream, by mass. KOH is used as the alkaline agent in pretreatment.
data.process results raw	Lignin Percent Mass Basis	float	percent	Lignin mass fraction (% w/w). Percentage of lignin in the stream, by mass. Lignin is a recalcitrant component of biomass.
data.process results raw	MEA Percent Mass Basis	float	percent	Monoethanolamine (MEA) mass fraction (% w/w). Percentage of MEA in the stream, by mass. MEA is used for CO2 removal in gas upgrading.
data.process results raw	Scenario	string	NA	The sequence of processing steps being investigated.
data.process results raw	Streams	string	NA	Name or code for the process stream within the scenario (e.g., "S1", "S2", ...). Each stream corresponds to a specific point in the process flowsheet (see thesis/paper for flowsheet diagram).
data.process results raw	Total Flow kg per hr	float	NA	Total mass flow rate of the stream (kg/hr). The sum of all components in the stream, as calculated by the process simulation.
data.process results raw	Xylose Percent Mass Basis	float	percent	Xylose mass fraction (% w/w). Percentage of xylose in the stream, by mass. Represents hemicellulosic sugars.
data.process results raw	process results raw pkey	integer	dimensionless	A unique primary key for this table.