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Methane Cracking over a Bituminous Coal Char

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Methane cracking over a bed of Chinese bituminous coal char was studied using a fixed-bed reactor
at atmospheric pressure and temperatures between 1073 and 1223 K. Methane conversion over the fresh
char increased with increasing temperature to 90% at 1223 K. Hydrogen was the only gas-phase product
that was detected during the experimentation. The char was shown to exert a significant catalytic effect
on methane cracking by comparing results from experiments with the raw char and demineralised char
as well as from blank experiments using quartz. It was further shown that the ash was not the source
of the catalytic effect of the char. However, both methane conversion and hydrogen yield decreased with
increasing reaction time, irrespective of other experimental conditions, indicating that the char rapidly
became deactivated following the exposure to methane. It was speculated that the deposition of carbon
from methane cracking was responsible for this deactivation, which is supported by scanning electron
microscopy (SEM) image analysis. It was demonstrated that the catalytic activity of the deactivated char can
be partially recovered by burning off the carbon deposits with an oxidizing gas mixture containing 0.46%
oxygen.

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Informasi Detail

Judul Seri

Energy & Fuels

No. Panggil

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Penerbit

New York : American Chemical Society., 2007

Deskripsi Fisik

Energy & Fuels 2007, 21, 1601-1605

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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