Novel treatment of a biomass tar model compound via microwave-metal discharges

Novel treatment of a biomass tar model compound via microwave-metal discharges
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通过微波金属放电处理生物质焦油模型化合物的新方法

DOI:
10.1016/j.fuel.2017.06.075
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发表时间:
2017-11
期刊:
影响因子:
7.4
通讯作者:
马春元
马春元
中科院分区:
工程技术1区
文献类型:
--
作者:
孙静;王文龙;宋占龙;赵希强;毛岩鹏;马春元

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微波-金属相互作用引发的放电是微波加热过程中产生等离子体的重要现象。在这项研究中,微波金属(MW-m)放电被开发用于焦油破坏。使用甲苯作为焦油模型化合物。采用并优化均匀的钨电极,提供快速点火、相对稳定和可持续的放电过程。研究了不同气体流量下甲苯的转化率,并进行了初步测试以原位消除固体碳的产生。微波钨放电能有效地将甲苯分解为有用气体(H2、C2H2和CH4)和固体碳,转化效率高达90%以上。通过在放电反应中引入水蒸汽,可以有效消除产生的固体碳,达到92.3%的甲苯转化率,并产生合成气(H2与CO之比约为1.6)。该工作可为开发生物质气化焦油裂解新技术提供重要参考。
Electrical discharges triggered by microwave-metal interactions are important phenomena in microwave heating processes with the generation of plasma. In this study, microwave-metal (MW-m) discharge was developed for tar destruction. Toluene was used as a tar model compound. Uniform tungsten electrodes was adopted and optimized to provide a fast-ignition, relatively-stable and sustainable discharge process. The conversions of toluene were investigated at different gas flow rates and preliminary tests were conducted to in-situ eliminate the generation of solid carbon. Microwave-tungsten discharge can effectively destruct toluene into useful gases (H2, C2H2and CH4) and solid carbon, with a high conversion efficiency of more than 90%. The generated solid carbon can be effectively eliminated by introducing water steam into the discharge reaction to achieve a comparable toluene conversion efficiency of 92.3% and a production of syngas (H2to CO ratio is around 1.6). This work can offer important reference for developing a new technology for tar cracking in a biomass gasification process.
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