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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.
The direct conversion of syngas to highly selective hydrocarbon production is still a huge challenge.In this paper, Cr-Zn oxide as the core, Si O2 as the intermediate transition layer, and then by in situ hydrothermal synthesis covered with a layer of SAPO-34 molecular sieve As the core-shell structure catalyst for the shell.Synthetic gas conversion reaction results show that, compared with the pure Cr-Zn metal oxide, the core-shell structure catalyst moves the product distribution from methanol and methane to C2-C4 hydrocarbons (all hydrocarbon products 66.9%) .This shows that the core-shell structure of the catalyst for the direct synthesis of liquefied petroleum gas by one-step reaction is feasible, but the structure and composition of the catalyst to be further optimized to improve its catalytic performance.