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首页> 外文期刊>Journal of Chemical Technology & Biotechnology >Catalyzed gasification of active carbon by oxygen: influence of catalyst type, temperature, oxygen partial pressure and particle size
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Catalyzed gasification of active carbon by oxygen: influence of catalyst type, temperature, oxygen partial pressure and particle size

机译：氧气对活性炭的催化气化：催化剂类型，温度，氧气分压和粒径的影响

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摘要

A thermogravimetric study of the oxygen gasification of a commercial active carbon using Co, Ni and Cu as catalysts has been carried out. This follows a previous study of the influence of the particle size, gas volumetric flow rate, initial sample weight temperature and oxgyen partial pressure an non-catalytic gasification. The results show that for T<500degC; P_(02)<1 atm; P_(02)<1 atm; D_p<0.4 mm, Q_v>50 cm~3 min~(-1) and M_o<75 mg the gasification of the acitve carbon iwht oxygen is controlled by the chemical reaction. The presence of a catalyst increases in all case the reaction rate, both temperature and catalyst concentration showing a very positive influence. The activity of the differnet catalysts follows the order: Co>Cu>Ni. A kinetic study applied to both types of gasification has allowed the activation energy and the reaction order with respect to oxygen and the catalyst to be determined. In all cases both the activation energy and the Arrhenius pre-exponential factor are lower in the catalytic gasification. This brings about the existence of an isokinetic point for the catalytic and the non-catalytic processes, which were also determined.
机译：已经进行了使用Co，Ni和Cu作为催化剂的商业活性炭的氧气气化的热重研究。在此之前，对非催化气化过程中粒径，气体体积流量，初始样品重量温度和氧分压的影响进行了研究。结果表明，对于T <500℃; P_（02）<1个大气压; P_（02）<1个大气压; D_p <0.4 mm，Q_v> 50 cm〜3 min〜（-1），M_o <75 mg，氧气中的活性炭气化是通过化学反应来控制的。在所有情况下，催化剂的存在都会增加反应速率，温度和催化剂浓度都显示出非常积极的影响。不同催化剂的活性遵循以下顺序：Co> Cu> Ni。应用于两种气化的动力学研究已经确定了关于氧气和催化剂的活化能和反应顺序。在所有情况下，催化气化中的活化能和Arrhenius指数前因子均较低。这带来了催化过程和非催化过程的等动力学点的存在，它们也已确定。

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