Rh/MgAlO/ fecral泡沫结构催化剂，具有可调的碱性和金属-载体相互作用，用于甲苯的有效蒸汽重整

IF 4.3 2区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Science Pub Date : 2025-06-09 DOI:10.1016/j.ces.2025.122006

Shangxin Guo , Rongrong Zhang , Sibao Liu , Guozhu Liu

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引用次数: 0

摘要

蒸汽重整是生物质气化过程中一种很有前途的除焦油方法。本研究提出了一系列以FeCrAl泡沫为载体的Rh/MgAlO催化剂，具有可调的金属-载体相互作用（MSI），用于甲苯蒸汽重整。通过调整Mg/Al比，优化了Rh分散度、基本性能和MSI。通过氢氧转化，在Rh表面形成多孔MgAlO覆盖层，增强了Rh- mgalox界面，提高了催化活性和高温稳定性。在结构催化剂中，Mg/Al比为1:1的Rh/MgAlO催化剂由于具有中等的MSI和碱性，表现出优异的活性和抗烧结、抗积炭性能。催化性能取决于表面Rh0上的C-C/C-H键断裂和碱性位点上的H2O活化之间的平衡。Rh-MgAlOx界面促进了MgAlOx上H2O产生的活性氧与Rh0位甲苯分解产生的CHx蒸汽的相互作用

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Rh/MgAlO/FeCrAl-foam structured catalyst with tunable basic and metal-support interaction for effective steam reforming of toluene

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Rh/MgAlO/FeCrAl-foam structured catalyst with tunable basic and metal-support interaction for effective steam reforming of toluene

Steam reforming of tar is a promising method for tar removal during biomass gasification. This study presents a series of Rh/MgAlO catalysts supported on FeCrAl-foam, featuring tunable metal-support interactions (MSI) for toluene steam reforming. The Rh dispersion, basic properties, and MSI were optimized by adjusting the Mg/Al ratio. A porous MgAlO overlayer on Rh was achieved through hydroxide-to-oxide transformation, enhancing the Rh-MgAlO_x interface and improving catalytic activity and high-temperature stability. Among the structured catalysts, the Rh/MgAlO catalyst with an optimal Mg/Al ratio (1:1) exhibited superior activity and excellent resistance to sintering and coke deposition, attributed to its medium MSI and basic properties. The catalytic performance depends on the balance between C-C/C-H bond scission on surface Rh⁰ and H₂O activation over basic sites. The Rh-MgAlO_x interface promotes the interaction of active oxygen from H₂O on MgAlO_x with CH_x steam from toluene decomposition on Rh⁰ sites.

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来源期刊

Chemical Engineering Science 工程技术-工程：化工

CiteScore

7.50

自引率

8.50%

发文量

1025

审稿时长

50 days

期刊介绍： Chemical engineering enables the transformation of natural resources and energy into useful products for society. It draws on and applies natural sciences, mathematics and economics, and has developed fundamental engineering science that underpins the discipline. Chemical Engineering Science (CES) has been publishing papers on the fundamentals of chemical engineering since 1951. CES is the platform where the most significant advances in the discipline have ever since been published. Chemical Engineering Science has accompanied and sustained chemical engineering through its development into the vibrant and broad scientific discipline it is today.