Biogas reforming over bimetallic PdNi catalysts supported on phosphorus-modified alumina

被引：45

作者：

Damyanova, S. ^{[1
]}

Pawelec, B. ^{[2
]}

Arishtirova, K. ^{[1
]}

Fierro, J. L. G. ^{[2
]}

机构：

[1] Bulgarian Acad Sci, Inst Catalysis, BU-1113 Sofia, Bulgaria

[2] CSIC, Inst Catalisis & Petroleoquim, E-28040 Madrid, Spain

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 17期

关键词：

Dry reforming of CH4; Bimetallic PdNi catalysts; Alumina modified with phosphorus; Characterization; SOLID-SOLUTION CATALYSTS; CARBON-DIOXIDE; SYNTHESIS GAS; REACTION PATHWAYS; NICKEL-CATALYSTS; CERIA CONTENT; METHANE; CO2; SURFACE; NI;

D O I：

10.1016/j.ijhydene.2011.05.098

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A series of bimetallic PdNi catalysts supported on alumina modified with different amounts of phosphorus (0.5-5 wt%) were prepared. The effect of phosphorus content on the structure, surface properties and catalytic behavior of supported PdNi catalysts in biogas reforming was studied. The physicochemical properties of the samples were characterized by using different techniques: N-2 adsorption-desorption isotherms, X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (TPR), temperature-programmed desorption of ammonia (TPD), thermogravimetric and differential thermal analysis (TG/DTA) and scanning transmission electron microscopy (STEM). The catalytic properties of the catalysts were evaluated in the reaction of reforming of methane with CO2. It was shown that increasing the P content (>= 1 wt%) leads to agglomeration of the metal Ni particles, as well as to increase of the total acidity of the catalysts. Within bimetallic system, the PdNi catalyst with 0.5 wt% phosphorus showed the best performance and stability caused by the presence of highly dispersed nickel particles on the catalyst surface due to the strong interaction between supported species and alumina. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：10635 / 10647

页数：13

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