铜基催化剂对不同气氛下麦秆热解产生焦油和芳烃的作用  

Effects of Cu-based Catalyst on Tar and Aromatic Hydrocarbons from Wheat Straw Pyrolysis under Different Atmospheres

作　　者：孙亭亭[1] 肖军[1] 宋敏[1] Sun Tingting;Xiao Jun;Song Min(Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《发电设备》2018年第3期168-174,共7页Power Equipment

基　　金：国家自然科学基金(51576047;51576048)

摘　　要：采用浸渍法制备铜基催化剂Cu/Al,并在横向管式炉中进行了麦秆的催化热解,研究在不同温度(600℃、700℃、800℃)及不同气氛(N_2或N_2+水蒸气)下催化剂对麦秆热解产物分布、焦油成分分布的影响。结果表明:在两种气氛下,Cu/Al催化热解产物中气相产率增加,而固相与液相产率下降,且热解气体产物与焦油成分随温度的变化趋势与Al_2O_3一致;在两种气氛下,Cu/Al均有利于促进挥发分二次裂解和抑制芳烃聚合,减少多环芳烃及其衍生物的生成。The experiments of wheat straw pyrolysis were carried out at different temperatures（600℃,700 ℃ and 800 ℃）and under different atmospheres（nitrogen or nitrogen with steam）in a horizontal tube furnace,with the Cu-based（Cu/Al）catalysts prepared by impregnation method,so as to further study the influences of Cu/Al catalysts on the pyrolysis product distribution and tar composition.Results show that Cu/Al catalysts can increase the gas yield whereas decrease the solid and liquid production rates in both atmospheres,and the changing trends of pyrolysis gas products and tar compositions with temperatures are consistent with those using Al2O3;besides,Cu/Al catalysts are beneficial to promoting secondary cracking of volatiles and inhibiting polymerization of polycyclic aromatic hydrocarbons（PAHs）,which would result in reduced PAHs and their derivatives.

关 键 词：热解 焦油 芳烃 麦秆 铜基催化剂 

分 类 号：TK62[动力工程及工程热物理—生物能]