Support effects on Ru-based catalysts for Fischer-Tropsch synthesis to olefins

Q3 Energy

燃料化学学报 Pub Date : 2023-10-01 DOI:10.1016/S1872-5813(23)60351-2

Tai-zhen YAO , Yun-lei AN , Hai-ling YU , Tie-jun LIN , Fei YU , Liang-shu ZHONG

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引用次数: 0

Abstract

The effects of supports (CeO₂, ZrO₂, MnO₂, SiO₂ and active carbon) on the structure and catalytic performance of Ru-based catalysts for Fischer-Tropsch synthesis to olefins (FTO) were investigated. It was found that the intrinsic characteristics of supports and the metal-support interaction (MSI) would greatly influence the catalytic performance. The catalytic activity followed the order: Ru/SiO₂ > Ru/ZrO₂ > Ru/MnO₂ > Ru/AC > Ru/CeO₂. As far as olefins selectivity was concerned, both Ru/SiO₂ and Ru/MnO₂ possessed high selectivity to olefins (>70%), while olefins selectivity for Ru/ZrO₂ was the lowest (29.9%). Ru/SiO₂ exhibited the appropriate Ru nanoparticles size (~ 5 nm) with highest activity due to the relatively low MSI between Ru and SiO₂. Both Ru/AC and Ru/MnO₂ presented low CO conversion with Ru nanoparticles size of 1–3 nm. Stronger olefins secondary hydrogenation capacity led to the significantly decreased olefins selectivity for Ru/AC and Ru/ZrO₂. In addition, partial Ru species might be encapsulated by reducible CeO₂ layer for Ru/CeO₂ due to strong MSI effects, leading to the lowest activity.

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钌基费托合成烯烃催化剂的负载效应

研究了载体（CeO2、ZrO2、MnO2、SiO2和活性炭）对钌基催化剂结构和催化性能的影响。研究发现，载体的固有特性和金属-载体相互作用（MSI）对催化性能有很大影响。催化活性的顺序为：Ru/SiO2>；Ru/ZrO2>；Ru/MnO2>；Ru/AC>；Ru/CeO2。就烯烃选择性而言，Ru/SiO2和Ru/MnO2对烯烃的选择性都很高（>；70%），而对Ru/ZrO2的烯烃选择性最低（29.9%）。由于Ru和SiO2之间的MSI相对较低，Ru/SO2表现出合适的Ru纳米颗粒尺寸（~5nm）和最高的活性。Ru/AC和Ru/MnO2都表现出低的CO转化率，Ru纳米颗粒尺寸为1–3 nm。更强的烯烃二次加氢能力导致Ru/AC和Ru/ZrO2的烯烃选择性显著降低。此外，由于强烈的MSI效应，Ru/CeO2的部分Ru物种可能被可还原的CeO2层包裹，导致最低的活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.