Coking resistance evaluation of tar removal catalysts

被引：20

作者：

Quitete, Cristina P. B. ^{[1
,2
]}

Bittencourt, Roberto Carlos P. ^{[1
]}

Souza, Mariana M. V. M. ^{[2
]}

机构：

[1] Petrobras Cenpes, BR-21941950 Rio De Janeiro, RJ, Brazil

[2] Univ Fed Rio de Janeiro, Escola Quim, Ctr Tecnol, BR-21941909 Rio de Janeiro, RJ, Brazil

来源：

CATALYSIS COMMUNICATIONS | 2015年 / 71卷

关键词：

Coking resistance; Nickel; Hexaaluminate; Tar; Steam reforming; NICKEL-CATALYSTS; NI/AL2O3; CATALYSTS; CARBON FORMATION; STEAM; METHANE; CO2; GASIFICATION; HYDROCARBONS; OXIDATION; GAS;

D O I：

10.1016/j.catcom.2015.08.013

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：

The tendency towards coke formation on nickel catalysts supported on hexaaluminates of barium, lanthanum and lanthanum/cerium was evaluated by two different methods: model reaction of cyclohexane dehydrogenation and thermogravimetric analysis using a synthetic gas composition. The ratio between hydrogenolysis and dehydrogenation rates provided a good indication of the potential for coke formation on the catalyst and is correlated to the nickel particle size. Thermogravimetric analysis was performed using a synthetic mixture containing H-2, CO, CO2 and CH4, and also in the presence of C2H4. The catalyst supported on barium hexaaluminate presented lower coking rate and higher activity in toluene steam reforming, with preferential formation of filamentous carbon. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：79 / 83

页数：5

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