CELLULOSIC COST-CLAIM REVIEW
Yenra | Updated September 8, 2026
Article: https://yenra.com/wiki/Low-cost_cellulosic_biofuel_production/

PURPOSE
Review a cellulosic ethanol production-cost claim. For another fuel or pathway, revise the product definition, conversion yield and energy balance.

CLAIM AND BOUNDARY
Claim text/source/date; product and specification:
Feedstock type/composition/moisture:
Dry mass versus wet delivered mass; units and conversion:
Process route and integrated mass/energy balance:
Plant location/scale, currency and cost year:
Included/excluded costs and coproduct/policy credits:

PRODUCTION DENOMINATOR
Dry tonnes per operating day:
Operating days per year:
Saleable litres per dry tonne:
Annual litres = dry tonnes/day x operating days x L/dry tonne.
Fixed-cost component per L = annual fixed cost / annual litres.
Feedstock component per L = delivered cost/dry tonne / L/dry tonne.
Fictional check: 100 dry t/day x 300 days x 250 L/dry t = 7.5 million L. At 200 days output is 5 million L. Invented US$3 million annual fixed cost gives $0.40/L or $0.60/L respectively. Invented $80/dry t feedstock gives $0.32/L at 250 L/t or $0.40/L at 200 L/t. These are components, not complete cost or current prices.

EVIDENCE AND SENSITIVITY
Lab/pilot/demonstration/commercial; run duration and scale:
Measured versus target yield, recovery and utilization:
Startup, downtime, off-spec material and maintenance treatment:
Utility/chemical/waste needs and feedstock variability:
Base and less-favorable cases for yield, uptime, supply and credits:
Scale-up evidence needed to support the proposed operation:
Conclusion / key dependency / missing record / responsible party:
Identify historical model assumptions explicitly; funding and construction milestones require separate operating evidence for cost claims.

REFERENCE CONTEXT
The linked article explains the comparisons and limits. Check exact project or equipment documents before using a specification.
U.S. Alternative Fuels Data Center’s ethanol-production overview
https://afdc.energy.gov/fuels/ethanol-production
May 2011 NREL corn-stover ethanol design report
https://afdc.energy.gov/files/pdfs/47764.pdf