等离子体耦合催化焦油脱除同时生物质燃气甲烷化性能研究  

Performance study on simultaneous tar removal and bio-syngas methanation by combining catalysis with nonthermal plasma

作　　者：徐彬[1] 李嘉卿 谢建军[1] 黄艳琴[1,3] 阴秀丽[1] 吴创之[1,2] XU Bin;LI Jia-qing;XIE Jian-jun;HUANG Yan-qin;YIN Xiu-li;WU Chuang-zhi(CAS Key Laboratory of Renewable Energy,Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Dalian National Laboratory for Clean Energy,Dalian 116023,China)

机构地区：[1]中国科学院广州能源研究所中国科学院可再生能源重点实验室,广东省新能源和可再生能源研究开发与应用重点实验室,广东广州510640 [2]中国科学院大学,北京100049 [3]中国科学院洁净能源创新研究院,辽宁大连116023

出　　处：《燃料化学学报》2021年第7期967-977,共11页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51576200);广东省自然科学基金重大培育项目(2017B030308002);中国科学院洁净能源创新研究院合作基金(DNL180306);中国科学院可再生能源重点实验室(中国科学院广州能源研究所)(E0290109)资助。

摘　　要：以含甲苯的模拟气化燃气(SGG)为对象,在介质阻挡放电耦合Ni/γ-Al2O3反应器上开展同时甲苯脱除及SGG甲烷化实验研究。考察了反应温度、H_(2)/CO比、H_(2)O添加的影响。结果表明,等离子体耦合催化可在400℃实现高效的同时甲苯脱除与SGG甲烷化。H_(2)/CO比为3.2时,甲苯脱除率与焦油脱除率可达100%和97%,CO转化率与CH4选择性可达88%和97%,甲苯脱除与SGG甲烷化过程能量效率可达9.7 g/(kW·h)和17.3 mol/(kW·h)。高H_(2)/CO比与H_(2)O添加可促进甲苯脱除和SGG甲烷化,降低催化剂积炭量并提升积炭石墨化程度,其中,高H_(2)/CO比还可提升SGG热值,获得高甲苯脱除及SGG甲烷化过程能量效率;而H_(2)O添加会降低热值且难获得高CH4选择性,同时不利于SGG甲烷化过程能量效率的提升。此外,SGG甲烷化会抑制甲苯的脱除,而甲苯因浓度较低对甲烷化过程的影响较小。In this work,simultaneous toluene removal and syngas methanation using the combination of packed-bed dielectric barrier discharge and Ni/γ-Al2O3 catalyst were conducted with the research object of simulated gasification gas(SGG)containing toluene.The effects of reaction temperature,H_(2)/CO ratio and H_(2)O addition on the reaction performances of both toluene removal and SGG methanation were investigated.The results show that high-efficiency simultaneous toluene removal and SGG methanation can be achieved at 400°C under plasma catalysis treatment.When the H_(2)/CO ratio is 3.2,the toluene removal rate and the tar removal rate are close to 100%and 97%,the CO conversion rate and CH4 selectivity approach about 88%and 97%,and the energy efficiencies in toluene removal and SGG methanation processes can reach 9.7 g/(kW·h)and 17.3 mol/(kW·h).Both the high H_(2)/CO ratio and the H_(2)O addition can promote toluene removal and SGG methanation,and reduce the amount of carbon deposition but increase its graphitized degree.Moreover,high H_(2)/CO ratio can rise the heating value of SGG and achieve higher energy efficiencies in both toluene removal and SGG methanation processes,while the H_(2)O addition is difficult to obtain high CH4 selectivity to increase the heating value and is not conducive to the promotion of energy efficiency in SGG methanation process.In addition,for these two simultaneous processes,the SGG methanation process exerts a significant inhibiting effect on toluene removal,but process of toluene removal has less influence on the other process due to the lower concentration of toluene.

关 键 词：生物质气化 焦油脱除 甲烷化 低温等离子体 催化 

分 类 号：TK6[动力工程及工程热物理—生物能]