Products distribution and kinetic analysis on gaseous products during fast pyrolysis of two kinds of biomass pellet
Products distribution and kinetic analysis on gaseous products during fast pyrolysis of two kinds of biomass pellet
复制标题
两种生物质颗粒快速热解过程中气体产物分布及动力学分析
DOI：
10.1016/j.fuel.2019.03.100
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发表时间：
2019-08
期刊：
影响因子：
7.4
通讯作者：
Yang Bolun
中科院分区：
文献类型：
--
作者：
Wu Zhiqiang;Zhang Bo;Hu Qiang;Hao Wenbin;Ma Chen;Li Yaowu;Yang Bolun
生物质可以通过快速热解转化为高附加值产品。将生物质挤压成颗粒不仅可以提高能量密度和燃烧特性，而且有利于储存和运输。本文采用恒温管式反应器结合在线质谱测定了两种生物质颗粒PP（松木颗粒）和BP（树皮颗粒）的热解特性。采用常规方法计算了初级气态产物形成的动力学参数。结果表明，随着热解温度从600℃升高到850℃，PP气态产物的收率从12.48%增加到21.11%，而焦油和焦炭的收率分别从70.62%下降到64.05%和16.9%到14.19%。随着温度的进一步升高，BP的产气率从12.10%增加到16.99%，并保持稳定。而BP的炭收率从30.86%下降到25.09%，热值从11.01MJ·M−3上升到13.21MJ·M−3。 PP的挥发分含量高于BP，导致气态产物的热值较高。 PP生成H2和BP生成CH4的活化能高于其他气态产物，分别为52.52kJ·mol−1和59.57kJ·mol−1。这项工作提供了生物质颗粒热行为的基本信息。
Biomass can be converted into high value-added products via rapid pyrolysis. Extruding biomass into pellets not only promote the energy density and combustion characteristics but also benefit for storage and transportation. In this paper, a thermostatic tubular reactor combined with online mass spectrometry was used to determine the pyrolysis characteristics of two biomass pellets, PP (pine pellet) and BP (bark pellet). The kinetic parameters about the formation of primary gaseous products were calculated by the iso-conventional method. The results show that with the pyrolysis temperature increasing from 600 °C to 850 °C, the yield of the gaseous products of PP increase from 12.48% to 21.11%, while the yield of tar and char decreased from 70.62% to 64.05% and 16.9% to 14.19%, respectively. The gas yield of BP increased from 12.10% to 16.99% and remained stable with the further increase of temperature. While the yield of char decreased from 30.86% to 25.09%, and the heat value increased from 11.01 MJ·M−3to 13.21 MJ·M−3from BP. The volatile content of the PP was higher than that of BP, resulting in a higher heat value of the gaseous product. The activation energy for the formation of H2from PP and CH4from BP was higher than other gaseous products, with the value of 52.52 kJ·mol−1and 59.57 kJ·mol−1, respectively. This work provides basic information on the thermal behavior of biomass pellet.
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