Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The catalytic effect of lignite-CO2 gasification with K2CO3, alkali earth and transition metal salts as catalytic additivesa)
In this study, the catalytic effects of impregnated catalysts of K2CO3, alkali earth, and transition metal salts in lignite-CO2 gasification were investigated. The gasification experiments were conducted over a temperature range of 800–900 °C at atmospheric pressure. Catalysts such as K2CO3, Ca(OH)2, CaCO3, Ce(NO3)3, and Fe(NO3)3 were impregnated on Mongolia coal using aqueous solutions in a rotary evaporator. The modified volumetric reaction model of the gas-solid reaction was applied to the experimental data to obtain kinetic information. The catalytic activity of single catalysts followed the sequence K2CO3 > Ca(OH)2 > CaCO3 > Fe(NO3)3 ≈ Ce(NO3)3. The reaction rate with K2CO3 can be enhanced by the addition of Ca(OH)2. The synergistic effect of K2CO3 4 wt. % + Ca(OH)2 1 wt. % exhibited the highest catalytic activity at 900 °C and the lowest activation energy.
The catalytic effect of lignite-CO2 gasification with K2CO3, alkali earth and transition metal salts as catalytic additivesa)
In this study, the catalytic effects of impregnated catalysts of K2CO3, alkali earth, and transition metal salts in lignite-CO2 gasification were investigated. The gasification experiments were conducted over a temperature range of 800–900 °C at atmospheric pressure. Catalysts such as K2CO3, Ca(OH)2, CaCO3, Ce(NO3)3, and Fe(NO3)3 were impregnated on Mongolia coal using aqueous solutions in a rotary evaporator. The modified volumetric reaction model of the gas-solid reaction was applied to the experimental data to obtain kinetic information. The catalytic activity of single catalysts followed the sequence K2CO3 > Ca(OH)2 > CaCO3 > Fe(NO3)3 ≈ Ce(NO3)3. The reaction rate with K2CO3 can be enhanced by the addition of Ca(OH)2. The synergistic effect of K2CO3 4 wt. % + Ca(OH)2 1 wt. % exhibited the highest catalytic activity at 900 °C and the lowest activation energy.
The catalytic effect of lignite-CO2 gasification with K2CO3, alkali earth and transition metal salts as catalytic additivesa)
Seo, Seok Jin (Autor:in) / Lee, So Jung (Autor:in) / Sohn, Jung Min (Autor:in)
01.09.2014
10 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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