Bimetallic PtSn nanoparticles confined in hierarchical ZSM-5 for propane dehydrogenation
Bimetallic PtSn nanoparticles confined in hierarchical ZSM-5 for propane dehydrogenation
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用于丙烷脱氢的分级 ZSM-5 中限制的双金属 PtSn 纳米颗粒
DOI：
10.1016/j.cjche.2021.11.020
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发表时间：
2021-12
影响因子：
3.8
通讯作者：
Zhu Haibo
中科院分区：
文献类型：
--
作者：
Wang Tianlei;Xu Zhikang;Yue Yuanyuan;Wang Tinghai;Lin Minggui;Zhu Haibo
以丙烷脱氢反应为目的，制备了一系列PtSn/分级ZSM-5催化剂，其中PtSn颗粒被限制在分级ZSM-5分子筛的介孔中。PtSn/分级ZSM-5催化剂的合成通过将Pt和Sn物质负载到通过常规ZSM-5的脱硅获得的分级ZSM-5催化剂上来实现。采用XRD、N_2吸附、STEM、XPS和CO-IR等手段对PtSn/分级ZSM-5催化剂进行了表征，结果表明PtSn纳米粒子高度分散地嵌入到分级ZSM-5的介孔中。脱硅过程中碱液浓度和PtSn/ZSM-5中Sn/Pt比对PtSn/ZSM-5的催化性能有很大影响。PtSn 1.00/ ZSM-5（0.8）催化剂的丙烷脱氢效率最高，在570 ℃时的初始转化率为46%，选择性为98%。这些PtSn/分级ZSM-5催化剂用于丙烷脱氢的高效率主要归因于PtSn颗粒在分级ZSM-5沸石的介孔中的限制。
A series of PtSn/hierarchical ZSM-5 catalysts were developed for propane dehydrogenation, in which the PtSn bimetallic particles are confined in the mesopores of hierarchical ZSM-5 zeolite. The synthesis of PtSn/hierarchical ZSM-5 catalysts was achieved via the loading of Pt and Sn species onto the hierarchical ZSM-5 catalysts that are obtained through a desilication of conventional ZSM-5. The PtSn/hierarchical ZSM-5 catalysts were fully characterized by XRD, N_2 adsorption, STEM, XPS, and CO-IR techniques, which reveals that highly dispersed PtSn bimetallic nanoparticles are enclosed into mesopores of hierarchical ZSM-5. The catalytic performance of PtSn/hierarchical ZSM-5 is greatly affected by the concentrations of alkali solution in the desilication process and Sn/Pt ratios in PtSn bimetallic particles. The PtSn1.00/ ZSM-5(0.8) catalyst shows the highest efficiency in propane dehydrogenation, which gives an initial conversion of 46% and selectivity of 98% at 570 ℃. The high efficiency in these PtSn/hierarchical ZSM-5 catalysts for propane dehydrogenation is mainly ascribed to the confinement of PtSn particles in the mesopores of hierarchical ZSM-5 zeolite.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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