Preparation and characterization of spherical nickel-doped carbonaceous resin as hydrogenation catalysts I. Carbonization procedures

Document Type

Article

Publication Date

8-23-2004

Abstract

A series of spherical nickel doped carbonized resin catalysts (Ni-Ca/C) was successfully prepared from bead-shaped polymerD152 Amberlyte exchanged with Ca2+ and Ni2+, carbonized and activated at 500-700°C. The effect of different preparation variables inclusive of carbonization method, carbonization temperature and steam activation on the properties of resultant was investigated. Preoxidation-multistage carbonization is most appropriate to make Ni-Ca/C have a high specific surface area, high dispersion of nickel on surface and good mechanical strength. The preoxidation promotes the crosslinking reactions during carbonization. The formation of network structure effectively restricts depolymerization reactions, loss of carbon and aggregate of nickel during carbonization. The optimal carbonization temperature was found to be in the range of 500-700°C and the optimal steam activation temperature in the range of 500-600°C. The interactions between nickel and its carbon support depend on the carbonization process and final temperature to a large extent. The proper choice of the preparation conditions allowed us to produce NiCa/C having a high degree of Ni dispersion (Ni crystallite size less than 16 Å) and a very high catalytic activity in hydrogenation of propenol under atmospheric pressure of H2 at 30°C. © 2004 Elsevier Ltd. All rights reserved.

Identifier

4043154877 (Scopus)

Publication Title

Carbon

External Full Text Location

https://doi.org/10.1016/j.carbon.2004.06.010

ISSN

00086223

First Page

2669

Last Page

2676

Issue

12-13

Volume

42

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