Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, United States.
Bioresour Technol. 2011 Apr;102(8):5265-9. doi: 10.1016/j.biortech.2011.02.018. Epub 2011 Feb 26.
The objective of this study was to elucidate primary and secondary reactions of cellulose pyrolysis, which was accomplished by comparing results from a micro-pyrolyzer coupled to a GC-MS/FID system and a 100 g/hr bench scale fluidized bed reactor system. The residence time of vapors in the micro-pyrolyzer was only 15-20 ms, which precluded significant secondary reactions. The fluidized bed reactor had a vapor residence time of 1-2 s, which is similar to full-scale pyrolysis systems and is long enough for secondary reactions to occur. Products from the fluidized bed pyrolyzer reactor were analyzed using a combination of micro-GC, GC-MS/FID, LC-MS and IC techniques. Comparison between the products from the two reactor systems revealed that the oligomerization of leglucosan and decomposition of primary products such as 5-hydroxymethyl furfural, anhydro xylopyranose and 2-furaldehyde were the major secondary reactions occurring in the fluidized bed reactor. This study can be used to build more descriptive pyrolysis models that can predict yield of specific compounds.
本研究的目的是阐明纤维素热解的一级和二级反应，通过比较与 GC-MS/FID 系统耦合的微热解仪和 100 g/hr 流化床反应器系统的结果来实现。微热解仪中蒸气的停留时间仅为 15-20 ms，这排除了显著的二级反应。流化床反应器的蒸气停留时间为 1-2 s，与大规模热解系统相似，足以发生二级反应。使用微 GC、GC-MS/FID、LC-MS 和 IC 技术组合分析流化床热解器反应器的产物。对两种反应器系统产物的比较表明，在流化床反应器中，半乳糖醇的齐聚和 5-羟甲基糠醛、脱水木糖和 2-糠醛等初级产物的分解是主要的二级反应。本研究可用于构建更具描述性的热解模型，以预测特定化合物的产率。
