fulltext.study @t Gmail

Coke formation during CO2 reforming of CH4 over alumina-supported nickel catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42875 45944 2009 6 PDF Available
Title
Coke formation during CO2 reforming of CH4 over alumina-supported nickel catalysts
Abstract

Carbon dioxide reforming of methane to synthesis gas over Ni supported alumina catalysts was investigated at atmospheric pressure. Two supports: high surface area γ-Al2O3 (SA-6175) and low surface α-Al2O3 (SA-5239) were used for the preparation of catalysts by the wet impregnation method. The reforming reactions were carried out using (CO2:CH4) feed ratio of 1:1, and reaction temperatures 500, 600, 700 and 800 °C. Influences of Ni loading, catalyst stability, coke deposition and synthesis gas ratio (H2/CO) were studied. Spent and fresh catalysts calcined at 900 °C were characterized by XRD, SEM and TGA techniques. It was observed that increasing Ni loading increases the formation of carbon. For high surface area catalyst, at low Ni loading, no coke formation on the catalyst was obtained. Similarly, no carbon formation was observed for low surface catalyst at 800 °C reaction temperature with feed ratio of 1.3/1.0.

Graphical abstractCarbon dioxide reforming of methane to synthesis gas over Ni supported alumina catalysts was investigated at atmospheric pressure. Influences of Ni loading, catalyst stability, coke deposition and synthesis gas ratios(H2/CO ratio) were studied. It was observed that, increasing Ni loading increases the formation of carbon. For high surface area catalyst, at low Ni loading, no coke formation on the catalyst was obtained.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
CO2 reforming; CH4 activation; Supported catalysts; Coke; Ni loading; Stability
First Page Preview
Coke formation during CO2 reforming of CH4 over alumina-supported nickel catalysts
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 364, Issues 1–2, 31 July 2009, Pages 150–155
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis