Technoeconomic analysis of wheat straw densification in the Canadian Prairie Province of Manitoba

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• 作者：Edmund Mupondwa^a ; ^{Edmund.Mupondwa@agr.gc.ca} ; Xue Li^a ; Lope Tabil^b ; Adapa Phani^b ; Shahab Sokhansanj^c ; ^d ; Mark Stumborg^e ; Margie Gruber^a ; Serge Laberge^f
• 关键词：Biomass densification ; Plant capacity ; Capital investment ; Net present value
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：April, 2012
• 卷：110
• 期：Complete
• 页码：355-363
• 文件大小：880 K

摘要

This study presents a technoeconomic analysis of wheat straw densification in Canada鈥檚 prairie province of Manitoba as an integral part of biomass-to-cellulosic-ethanol infrastructure. Costs of wheat straw bale and pellet transportation and densification are analysed, including densification plant profitability. Wheat straw collection radius increases nonlinearly with pellet plant capacity, from 9.2 to 37 km for a 2-35 tonnes h^鈭? plant. Bales are cheaper under 250 km, beyond which the cheapest feedstocks are pellets from the largest pellet plant that can be built to exploit economies of scale. Feedstocks account for the largest percentage of variable costs. Marginal and average cost curves suggest Manitoba could support a pellet plant up to 35 tonnes h^鈭?. Operating below capacity (75-50%) significantly erodes a plant鈥檚 net present value (NPV). Smaller plants require higher NPV break-even prices. Very large plants have considerable risk under low pellet prices and increased processing costs.