CAJ | 학술논문

采用浸渍法制备 Ni改性的 HZSM-5催化剂，采用 BET，XRD，Py-FTIR，NH3-TPD等分析手段对催化剂进行表征。以纯甲醇为原料，在固定床微反装置上，考察不同 Ni负载量改性 HZSM-5催化剂对甲醇芳构化（MTA）反应性能的影响。实验结果表明：Ni的引入使催化剂产生了比较稳定的新 L酸位；随着 Ni负载量的增加，Ni？HZSM-5催化剂的总酸量增加，尤其是弱酸酸量；MTA反应的芳烃总收率随着 Ni负载量的增加呈现先减少后增加然后又减少的趋势；Ni的引入可能改变了 HZSM-5催化剂上 MTA反应的路径，由氢转移芳构化向脱氢芳构化转变；生成的芳烃主要以C7～C9芳烃为主，C6和 C10＋芳烃相对较少；副产物甲烷和 COx收率则随 Ni负载量的增加而增加，这可能与 Ni促进了甲醇的甲烷化反应有关。
채용침지법제비 Ni개성적 HZSM-5최화제，채용 BET，XRD，Py-FTIR，NH3-TPD등분석수단대최화제진행표정。이순갑순위원료，재고정상미반장치상，고찰불동 Ni부재량개성 HZSM-5최화제대갑순방구화（MTA）반응성능적영향。실험결과표명：Ni적인입사최화제산생료비교은정적신 L산위；수착 Ni부재량적증가，Ni？HZSM-5최화제적총산량증가，우기시약산산량；MTA반응적방경총수솔수착 Ni부재량적증가정현선감소후증가연후우감소적추세；Ni적인입가능개변료 HZSM-5최화제상 MTA반응적로경，유경전이방구화향탈경방구화전변；생성적방경주요이C7～C9방경위주，C6화 C10＋방경상대교소；부산물갑완화 COx수솔칙수 Ni부재량적증가이증가，저가능여 Ni촉진료갑순적갑완화반응유관。
The performance of modified HZSM-5 catalysts with different loadings of nickel on the aromatization of methanol was investigated in a continuous fixed bed microreactor using pure methanol as raw material.The catalysts were characterized by BET,XRD,Py-FTIR,and NH3-TPD techniques.Results show that the introduction of nickel species results in the formation of new Lewis acid sites.Furthermore,the total acid amount of the HZSM-5 catalyst increases gradually,especially the weak acid,with increasing amount of nickel.The total aromatic yield decreases first and then increases,fol-lowed by decrease again with the Ni loading. The introduction of nickel species may change the path from the hydrogen transfer aromatization to the dehydrogenation aromatization. In addition,aromatic hydrocarbons generated are mainly C7—C9 aromatics,while C6 and C10+ aromatics are relatively few.Meanwhile,by-products such as methane and COx increase gradually with the increase of nickel loading, which is probably in correlation with the enhancement of methylation of methanol caused by nickel species.