Economic analysis of biomass torrefaction plants integrated with corn ethanol plants and coal-fired power plants

IF 0.5 Q4 ENERGY & FUELS Advances in Energy Research Pub Date : 2013-06-01 DOI:10.12989/ERI.2013.1.2.127
D. Tiffany, Won Fy Lee, V. Morey, N. Kaliyan
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引用次数: 8

Abstract

Torrefaction technologies convert assorted biomass feedstocks into energy- concentrated, carbon neutral fuel that is economically transported and easily ground for blending with fossil coals at numerous power plants around the world without needs to retrofit. Utilization of torrefied biomass in conventional electric generating units may be an increasingly attractive alternative for electricity generation as aging power plants in the world need to be upgraded or improved. This paper examines the economic feasibility of torrefaction in different scenarios by modeling torrefaction plants producing 136,078 t/year (150,000 ton/year) biocoal from wood and corn stover. The utilization of biocoal blends in existing coal-fired power plants is modeled to determine the demand for this fuel in the context of emerging policies regulating emissions from coal in the U.S. setting. Opportunities to co-locate torrefaction facilities adjacent to corn ethanol plants and coal-fired power plants are explored as means to improve economics for collaborating businesses. Life cycle analysis was conducted in parallel to this economic study and was used to determine environmental impacts of converting biomass to biocoal for blending in coal-fired power plants as well as the use of substantial flows of off-gasses produced in the torrefaction process. Sensitivity analysis of the financial rates of return of the different businesses has been performed to measure impacts of different factors, whether input prices, output prices, or policy measures that render costs or rewards for the businesses.
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生物质焙烧厂与玉米乙醇厂和燃煤电厂相结合的经济分析
焙烧技术将各种生物质原料转化为能量集中的碳中性燃料,这种燃料运输经济,易于研磨,可以在世界各地的许多发电厂与化石煤混合,而无需改造。由于世界上老化的发电厂需要升级或改进,在常规发电机组中利用碳化生物质可能是一种越来越有吸引力的发电替代方案。本文通过模拟从木材和玉米秸秆中生产136,078吨/年(150,000吨/年)生物煤的焙烧工厂,考察了不同情景下焙烧的经济可行性。对现有燃煤电厂中生物煤混合物的利用进行了建模,以确定在美国监管煤炭排放的新政策背景下对这种燃料的需求。探索在玉米乙醇厂和燃煤电厂附近共同选址炼油设施的机会,作为提高合作企业经济效益的手段。生命周期分析与这项经济研究同时进行,并用于确定将生物质转化为生物煤用于燃煤发电厂的混合以及在焙烧过程中产生的大量废气的使用对环境的影响。对不同企业的财务回报率进行了敏感性分析,以衡量不同因素的影响,无论是投入价格,产出价格还是为企业提供成本或回报的政策措施。
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Advances in Energy Research
Advances in Energy Research ENERGY & FUELS-
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