Improving the modeling of the kinetics of the catalytic tar elimination in biomass gasification
Improving the modeling of the kinetics of the catalytic tar elimination in biomass gasification
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DOI：
10.1021/ie0110336
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发表时间：
2002-06
影响因子：
4.2
通讯作者：
J. Corella;and José M. Toledo;M. Aznar
中科院分区：
文献类型：
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作者：
J. Corella;and José M. Toledo;M. Aznar
对于某些应用来说，用于催化消除生物质流化床气化炉烟气中焦油的单一一级反应还不够好。一个新的和更先进的反应网络和微观动力学模型已经产生，并在这里提出。它是基于两块，更多和更少的反应性焦油物种，并有四个动力学常数。每个块通过催化和热反应（消失）。将微动力学模型应用于在约840 °C和小型中试工厂水平下使用两种非常不同的固体获得的结果：硅砂和商业（ICI 46-1）镍基蒸汽重整催化剂。四个动力学常数的值是自洽的，很好地拟合的结果，并意味着一个明确的一步，在催化焦油减排的建模。
A single one-lump first-order reaction for the catalytic elimination of tar present in the flue gas from biomass-fluidized bed gasifiers is not good enough for some applications. A new and more advanced reacting network and microkinetic model has been generated and is here presented. It is based on two lumps, the more and the less reactive tar species, and has four kinetic constants. Each lump reacts (disappears) by both catalytic and thermal reactions. The microkinetic model is applied to results obtained at around 840 °C and at small pilot plant level with two very different solids: silica sand and a commercial (ICI 46-1) nickel-based steam-reforming catalyst. The values found for the four kinetic constants are self-consistent, fit well the results, and mean a clear step forward in the modeling of the catalytic tar abatement.