当前位置: X-MOL 学术Fuel Process. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Controllable synthesis of ultra-tiny nano-ZSM-5 catalyst based on the control of crystal growth for methanol to hydrocarbon reaction
Fuel Processing Technology ( IF 7.2 ) Pub Date : 2020-09-16 , DOI: 10.1016/j.fuproc.2020.106594
Tingjun Fu , Hao Zhou , Zhong Li

A series of aggregated nano-ZSM-5 with controlled crystal size (<100 nm) were prepared via low temperature hydrothermal synthesis and utilized for the study of particle size effect of ZSM-5 on methanol to hydrocarbon (MTH) reaction for the first time. The textural and acidic properties of ZSM-5 at different crystal growth process were characterized and analyzed by N2-sorption, XRD, NH3-TPD, TEM, SEM, TG, Py-IR and XPS. Two stages of crystal growth were found during the synthesis which could be used to guide the controlled synthesis of ultra-tiny nano-ZSM-5. According to catalytic performance, it was found that compared to external acid sites, internal acid sites play a crucial role on the synthesis of gasoline products. A positive relationship was found between the acidity and liquid hydrocarbon yield. In nanometer scale (<100 nm) the crystal size and acidity of ZSM-5 still strongly influenced the catalytic performance and a balance existed between the crystal size control and acidity regulation for the catalytic stability. This work could attract more attention on the structure fine control of nanoscale ZSM-5 catalyst.



中文翻译:

基于控制甲醇至烃反应的晶体生长的可控合成超小纳米ZSM-5催化剂

通过低温水热合成制备了一系列具有受控晶体尺寸(<100 nm)的纳米ZSM-5聚集体,并首次用于研究ZSM-5对甲醇制烃(MTH)反应的粒径影响。通过N 2吸附,XRD,NH 3表征和分析了ZSM-5在不同晶体生长过程中的质构和酸性。-TPD,TEM,SEM,TG,Py-IR和XPS。在合成过程中发现了两个晶体生长阶段,可用于指导超微小纳米ZSM-5的受控合成。根据催化性能,发现与外部酸性位相比,内部酸性位在汽油产物的合成中起关键作用。在酸度和液态烃产率之间发现正相关。在纳米级(<100 nm)中,ZSM-5的晶体尺寸和酸度仍然强烈影响催化性能,并且在晶体尺寸控制和酸度调节之间存在平衡,以保持催化稳定性。这项工作可能会在纳米级ZSM-5催化剂的结构精细控制上引起更多关注。

更新日期:2020-09-16
down
wechat
bug