核壳结构催化剂Cr-Zn@SiO2@SAPO-34催化合成气直接转化制低碳烃的性能

合成气直接转化高选择性制烃类产物仍是巨大的挑战.本文合成了以Cr-Zn氧化物为核,Si O2为中间过渡层,再通过原位水热合成覆盖一层SAPO-34分子筛为壳的核壳结构催化剂.合成气转化反应结果显示,与纯Cr-Zn金属氧化物相比,核壳结构催化剂将产物分布由甲醇和甲烷移动至C2–C4烃（所有烃类产物中占66.9%）.这表明核壳结构催化剂用于合成气一步法直接转化制液化石油气的反应具有可行性,但是催化剂结构和组成有待于进一步优化,以提高其催化反应性能....

Full description

Saved in:
Bibliographic Details
Published in催化学报 Vol. 36; no. 7; pp. 1131 - 1135
Main Author 李津京 潘秀莲 包信和
Format Journal Article
LanguageChinese
Published 中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连,116023 2015
Subjects
C2–C4烃
分子筛
合成气直接转化
核壳结构
铬锌金属氧化物
铬锌金属氧化物
核壳结构
Syngas direct conversion
C2-C4 hydrocarbons
合成气直接转化
Chromium-zinc oxide
Zeolite
Core-shell
分子筛
C2-C4烃
Online AccessGet full text

Cover

More Information
Summary:合成气直接转化高选择性制烃类产物仍是巨大的挑战.本文合成了以Cr-Zn氧化物为核,Si O2为中间过渡层,再通过原位水热合成覆盖一层SAPO-34分子筛为壳的核壳结构催化剂.合成气转化反应结果显示,与纯Cr-Zn金属氧化物相比,核壳结构催化剂将产物分布由甲醇和甲烷移动至C2–C4烃（所有烃类产物中占66.9%）.这表明核壳结构催化剂用于合成气一步法直接转化制液化石油气的反应具有可行性,但是催化剂结构和组成有待于进一步优化,以提高其催化反应性能.
Bibliography:Chromium-zinc oxide Zeolite Core-shell C2-C4 hydrocarbons Syngas direct conversion
Jinjing Li, Xiulian Pan, Xinhe Bao State（ Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China）
Direct conversion of syngas into hydrocarbons with high selectivity remains a challenge. Herein, we report the synthesis of a core–shell-structured catalyst constituting Cr-Zn oxide as the core and SAPO-34 as the shell for the conversion of syngas into hydrocarbons with high selectivity. A SiO 2layer was sandwiched between the core and the shell to prevent damage to the core during shell synthesis. Furthermore, the intermediate SiO 2 layer acted as a Si source for the formation of the shell. The prepared catalyst displayed considerably higher selectivity toward the production of C2–C4 hydrocarbons（66.9%） than that of methanol and methane. The findings show the potential of the prepared core–shell-structured catalyst in the one-step production of hydrocarbons, suc
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(14)60297-7