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Title: INTEGRATED PYROLYSIS COMBINED CYCLE BIOMASS POWER SYSTEM CONCEPT DEFINITION

Advanced power systems based on integrated gasification/combined cycles (IGCC) are often presented as a solution to the present shortcomings of biomass as fuel. Although IGCC has been technically demonstrated at full scale, it has not been adopted for commercial power generation. Part of the reason for this situation is the continuing low price for coal. However, another significant barrier to IGCC is the high level of integration of this technology: the gas output from the gasifier must be perfectly matched to the energy demand of the gas turbine cycle. We are developing an alternative to IGCC for biomass power: the integrated (fast) pyrolysis/ combined cycle (IPCC). In this system solid biomass is converted into liquid rather than gaseous fuel. This liquid fuel, called bio-oil, is a mixture of oxygenated organic compounds and water that serves as fuel for a gas turbine topping cycle. Waste heat from the gas turbine provides thermal energy to the steam turbine bottoming cycle. Advantages of the biomass-fueled IPCC system include: combined cycle efficiency exceeding 37 percent efficiency for a system as small as 7.6 MW{sub e}; absence of high pressure thermal reactors; decoupling of fuel processing and power generation; and opportunities for recovering value-added productsmore » from the bio-oil. This report provides a technical overview of the system including pyrolyzer design, fuel clean-up strategies, pyrolysate condenser design, opportunities for recovering pyrolysis byproducts, gas turbine cycle design, and Rankine steam cycle. The report also reviews the potential biomass fuel supply in Iowa, provide and economic analysis, and present a summery of benefits from the proposed system.« less
Authors:
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Publication Date:
OSTI Identifier:
826269
DOE Contract Number:
FC26-01NT41353
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Mar 2003
Research Org:
Alliant Energy (US)
Sponsoring Org:
(US)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; 21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS; 24 POWER TRANSMISSION AND DISTRIBUTION; BIOMASS; BOTTOMING CYCLES; COMBINED CYCLES; ECONOMIC ANALYSIS; ENERGY DEMAND; GAS TURBINES; LIQUID FUELS; ORGANIC COMPOUNDS; POWER GENERATION; POWER SYSTEMS; PYROLYSIS; STEAM TURBINES; THERMAL REACTORS; TOPPING CYCLES; WASTE HEAT