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了解和缓解通过酸水解和脱水生产的生物炭中的粘性
Ehsan Ullah Sardar1,2, Ravikant Patil2, Sampath Karunarathne2
1Chemical and Biomedical Engineering, University of Maine, Orono, Maine 04469, United States.
概括
用酸预先调节基纤维素生物质,可以显著减少酸生产过程中粘性生物炭的形成. 这种化学预处理提高了反应器的效率,并在酸化和脱水过程中提高了有机酸的产量.
科学领域:
- 生物质转换生物质转换
- 化学工程是化学工程的组成部分.
- 可持续的化学可持续的化学
背景情况:
- 酸是生物基产品的关键平台化学物质.
- 酸性水解和脱水 (AHDH) 是一种常见的生产方法.
- 粘性生物炭的形成阻碍了AHDH过程的可扩展性.
研究的目的:
- 调查化学预制,以减轻生物炭的形成.
- 提高反应堆运行能力和酸产量.
- 分析预条件对生物质成分的影响.
主要方法:
- 木质生物质预制 (170°C,0.26重量% H2SO4,30分钟). 在木质生物质预制过程中,
- 预条件生物质的酸性水解和脱水 (AHDH).
- 热重力测量分析 (TGA) 用于研究碳形成机制.
主要成果:
- 预先调节去除了半纤维素和酸溶性红素.
- 预条件固体的AHDH产生了不粘附的生物炭.
- TGA证实了降解产品和红素之间的相互作用减少.
- 软木种比硬木产生6%的有机酸;树皮降低了产量.
结论:
- 化学预制有效地减少了ADHDH中的粘性生物炭.
- 预处理提高了反应堆的运行能力和有机酸生产效率.
- 生物质原料的特性 (物种,树皮) 影响产量.
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