Change of pyrolysis characteristics and structure of woody biomass due to steam explosion pretreatment

IF 7.7 2区工程技术 Q1 CHEMISTRY, APPLIED

Fuel Processing Technology Pub Date : 2011-10-01 DOI:10.1016/j.fuproc.2011.04.038

Amit Kumar Biswas, Kentaro Umeki , Weihong Yang, Wlodzimierz Blasiak

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引用次数: 72

Abstract

Steam explosion (SE) pretreatment has been implemented for the production of wood pellet. This paper investigated changes in biomass structure due to implication of steam explosion process by its pyrolysis behavior/characteristics. Salix wood chip was treated by SE at different pretreatment conditions, and then pyrolysis characteristic was examined by thermogravimetric analyzer (TGA) at heating rate of 10 K/min. Both pyrolysis characteristics and structure of biomass were altered due to SE pretreatment. Hemicellulose decomposition region shifted to low temperature range due to the depolymerization caused by SE pretreatment. The peak intensities of cellulose decreased at mild pretreatment condition while they increased at severe conditions. Lignin reactivity also increased due to SE pretreatment. However, severe pretreatment condition resulted in reduction of lignin reactivity due to condensation and re-polymerization reaction. In summary, higher pretreatment temperature provided more active biomass compared with milder pretreatment conditions.

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蒸汽爆炸预处理对木质生物质热解特性及结构的影响

采用蒸汽爆破预处理技术生产木屑颗粒。本文从生物质的热解行为特征出发，研究了蒸汽爆炸过程对生物质结构的影响。采用SE处理不同预处理条件下的柳木屑，在升温速率为10 K/min的条件下，用热重分析仪(TGA)检测其热解特性。SE预处理改变了生物质的热解特性和结构。由于SE预处理引起的解聚作用，半纤维素分解区向低温区转移。在温和的预处理条件下，纤维素的峰值强度降低，而在严酷的预处理条件下，纤维素的峰值强度增加。木质素的反应性也因SE预处理而提高。然而，严格的预处理条件导致木质素的反应活性由于缩聚和再聚合反应而降低。综上所述，与较温和的预处理条件相比，较高的预处理温度提供了更多的活性生物质。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel Processing Technology 工程技术-工程：化工

CiteScore

13.20

自引率

9.30%

发文量

398

审稿时长

26 days

期刊介绍： Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.