Optimization and economic evaluation of industrial gas production and combined heat and power generation from gasification of corn stover and distillers grains

Ajay Kumar, Yasar Demirel, David D. Jones, Milford A. Hanna

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

Thermochemical gasification is one of the most promising technologies for converting biomass into power, fuels and chemicals. The objectives of this study were to maximize the net energy efficiency for biomass gasification, and to estimate the cost of producing industrial gas and combined heat and power (CHP) at a feedrate of 2000 kg/h. Aspen Plus-based model for gasification was combined with a CHP generation model, and optimized using corn stover and dried distillers grains with solubles (DDGS) as the biomass feedstocks. The cold gas efficiencies for gas production were 57% and 52%, respectively, for corn stover and DDGS. The selling price of gas was estimated to be $11.49 and $13.08/GJ, respectively, for corn stover and DDGS. For CHP generation, the electrical and net efficiencies were as high as 37% and 88%, respectively, for corn stover and 34% and 78%, respectively, for DDGS. The selling price of electricity was estimated to be $0.1351 and $0.1287/kW h for corn stover and DDGS, respectively. Overall, high net energy efficiencies for gas and CHP production from biomass gasification can be achieved with optimized processing conditions. However, the economical feasibility of these conversion processes will depend on the relative local prices of fossil fuels.

Original languageEnglish (US)
Pages (from-to)3696-3701
Number of pages6
JournalBioresource Technology
Volume101
Issue number10
DOIs
StatePublished - May 2010

Keywords

  • Aspen Plus model
  • Biomass thermochemical gasification
  • Combined heat and power generation
  • Economics
  • Industrial gas

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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