化工进展2025，Vol.44Issue(3)：1355-1367,13.DOI:10.16085/j.issn.1000-6613.2024-0379
Mg改性对低铂载量Pt/ZSM-22烷烃加氢异构性能的影响
Effect of Mg-modification on the catalytic performance of Pt/ZSM-22 with low Pt content in n-alkane hydroisomerization
摘要
Abstract
Mg-modified PtMg/ZSM-22 catalyst with low-content Pt(Pt mass fraction 0.1%)was prepared by incipient wetness co-impregnation method using ZSM-22 as the support.N2 adsorption,temperature programmed desorption of NH3,Py-FTIR,OH-FTIR,and 2,6-DTBPy-FTIR were applied to characterize the catalysts.The results revealed that Mg-modification reduced the specific surface area,the micropore volume,the amount of medium-strong Brønsted sites,and the total acid sites on Pt/ZSM-22 catalysts.The hydroisomerization performance of the catalysts was evaluated using n-dodecane as the model reactant in a fixed-bed reactor.The results of n-dodecane hydroisomerization showed that the selectivity of the i-dodecane increases significantly after the modification of the Mg promoter.An i-dodecane yield of 84.3%were obtained on the Pt0.5Mg/ZSM-22 catalyst.According to the results of the reaction and catalyst characterization,the effects of the Mg promoter on the texture properties,acidity,and catalytic performance of the bifunctional catalysts were discussed.关键词
催化剂/分子筛/烷烃/加氢异构/Mg助剂/孔道性质/酸性Key words
catalyst/molecular sieves/alkane/hydroisomerization/Mg-additive/texture properties/acidity分类
化学工程引用本文复制引用
毕文涛,王学林,曲炜,王从新,田志坚..Mg改性对低铂载量Pt/ZSM-22烷烃加氢异构性能的影响[J].化工进展,2025,44(3):1355-1367,13.基金项目
国家重点研发计划(2020YFB0606405) （2020YFB0606405）
中国科学院战略性先导专项A(XDA21021201). （XDA21021201）
