Mg与聚乙二醇协同改性对ZSM-5催化剂裂解甘蔗渣性能的影响  

Effects of Mg and polyethylene glycol modification of ZSM-5 catalyst on cracking bagasse

作　　者：鞠亚楠 程向炜[2] 杨霞珍[1] 霍超[1] 刘化章[1] JU Yanan;CHENG Xiangwei;YANG Xiazhen;HUO Chao;LIU Huazhang(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310012,Zhejiang,China;Zhejiang Police College,Hangzhou 310053,Zhejiang,China)

机构地区：[1]浙江工业大学化工学院,浙江杭州310012 [2]浙江警察学院,浙江杭州310053

出　　处：《化工进展》2022年第S01期221-228,共8页Chemical Industry and Engineering Progress

基　　金：浙江省自然科学基金一般项目(LY18B060015,LQ19B060007);浙江省自然科学基金横向项目(KYY-HX-20210097)。

摘　　要：采用水热合成法,在制备ZSM-5的过程中添加Mg或/和聚乙二醇(PEG),制备了一系列原位改性的ZSM-5催化剂,并运用XRD、SEM、EDS-Mapping、BET、NH_(3)-TPD等大型仪器对所制备的催化剂进行表征分析。结果表明:改性后的ZSM-5催化剂在孔径、孔容、酸量和酸强度方面均有不同程度的提高。进一步将改性的ZSM-5催化剂用于甘蔗渣催化裂解反应。评价结果显示,相较于甘蔗渣直接裂解,催化裂解可以显著提高2,3-二氢苯并呋喃产物的选择性,而金属Mg的引入、酸型、孔径和孔容是影响2,3-二氢苯并呋喃生成的主要因素。同时,金属Mg和聚乙二醇之间存在一定的协同作用。金属Mg和聚乙二醇协同改性的ZSM-5催化剂催化裂解甘蔗渣得到的生物油中呋喃类选择性高达40.12%,其中2,3-二氢苯并呋喃的选择性达到23.16%。A series of in-situ modified ZSM-5 catalysts were prepared by hydrothermal synthesis method through adding Mg or/and polyethylene glycol.The catalysts were characterized by XRD,SEM,EDSMapping,BET and NH_(3)-TPD.The results showed that the modified ZSM-5 catalysts had improved pore size,pore volume,acid content and acid strength.The modified catalysts were further used for catalytic cracking of bagasse.The catalytic cracking had significantly improved the selectivity of 2,3-dihydrobenzofuran product as compared with direct pyrolysis of bagasse,and the introduction of metal Mg,acid type,and the pore size and volume are the main factors affecting the formation of 2,3-dihydrobenzofuran.At the same time,there was a synergistic effect between Mg and polyethylene glycol.The selectivity of furans in bio-oil from bagasse pyrolysis was 40.12%,and the selectivity of 2,3-dihydrobenzofurans was 23.16%.

关 键 词：催化剂 热解 分子筛 生物质 2 3-二氢苯并呋喃 

分 类 号：TQ352.79[化学工程]