Improving hydrocarbons production via catalytic co-pyrolysis of torrefied-biomass with plastics and dual catalytic pyrolysis  

作　　者：Peter Keliona Wani Likun Huiyan Zhang Yuyang Fan 

机构地区：[1]Key Laboratory of Thermal Energy Conversion and Control Ministry of Education,Southeast University,Nanjing 210096,China [2]Department of Mechanical Engineering,Juba University,Juba,P.O.Box 82,South Sudan

出　　处：《Chinese Journal of Chemical Engineering》2022年第2期196-209,共14页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foun-dation for Excellent Young Scholar of China(51822604);the Nature Science Foundation of Jiangsu Province for Distinguished Young Scholar(BK20180014).

摘　　要：To increase the low yield and selectivity of aromatic hydrocarbons during the biomass pyrolysis process,we torrefied the biomass and then co-pyrolyzing with plastics such as high-density polyethylene(HDPE),polystyrene(PS),ethylene-vinyl acetate(EVA)and polypropylene(PP)and also single and dual catalyst layouts were investigated by Py-GC/MS.The results showed that non-catalytic fast pyrolysis(CFP)of raw bagasse(RBG)generated no aromatics.After torrefaction non-CFP of torrefied bagasse(TBG)generated low aromatic yield.Indicating that torrefaction would enhance the proportion of aromatics during the pyrolysis process.The CFP of TBG_(200℃)and TBG_(240℃)over ZSM-5 produced the total aromatic yield of 1.96 and 1.88 times higher,respectively,compared to non-CFP of TBG.Furthermore,the addition of plastic could increase H/Ceff ratio of the mixture,consequently,increase the yield of aromatic compounds.Among the various torrefied-bagasse/plastic mixtures,the CFP of TBG/EVA(7:3 ratio)mixture generated the highest the total aromatic yield of 7.7 times more than the CFP of TBG alone.The dual catalyst layout could enhance the yield of aromatics hydrocarbons.The dual-catalytic co-pyrolysis of TBG_(200℃)/plastic(1:1)ratio over USY(ultra-stable Y zeolite)/ZSM-5,improved the total aromatics yield by 4.33 times more than the catalytic pyrolysis of TBG_(200℃)alone over ZSM-5 catalyst.The above results showed that the yield and selectivities of light aromatic hydrocarbons can be improved via catalytic co-pyrolysis and dual catalytic co-pyrolysis of torrefied-biomass with plastics.

关 键 词：TORREFACTION Biomass PLASTICS CO-PYROLYSIS Dual-catalyst AROMATICS Selectivity 

分 类 号：TQ426[化学工程] TK6[动力工程及工程热物理—生物能]