Carbon deposition in methane reforming with carbon dioxide - Dry reforming

被引：29
|
作者：
Gronchi, P
Fumagalli, D
Del Rosso, R
Centola, P
机构：
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1996年 / 47卷 / 01期
关键词：
carbon deposition; dry reforming; Ni catalysts;
D O I：
10.1007/BF01982701
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Coke formation in the dry reforming of methane was studied using a thermobalance (TG) and with a catalytic microreactor in the temperature range 800-950 K. Silica-supported and lanthana-supported nickel catalysts were examined. The effects of process variables such as temperature and gas composition (He dilution, CH4/CO2 ratio) on the coke formation rate were determined. The reactivity of H-2 On several kinds of carbon was also investigated. The morphology of the coke was studied by scanning electron microscopy (SEM). The induction times for coke formation were significantly affected by temperature and by the CO content in the feed gas. The results of catalytic tests were consistent with the TG measurements. The behaviour of SiO2 and La2O3 supported Ni catalysts agree with a mechanism in which the lanthana support plays an important role in the carbon deposition.
引用
收藏
页码：227 / 234
页数：8
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