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Novel Model for the Release and Condensation of Inorganics for a Pressurized Fluidized-Bed Gasification Process: Effects of Gasification Temperature
ACS Omega ( IF 4.1 ) Pub Date : 2018-06-12 00:00:00 , DOI: 10.1021/acsomega.8b00019
Wei Wan 1 , Klas Engvall 1 , Weihong Yang
Affiliation  

A model is established to investigate the release and condensation of inorganics for a wood steam/oxygen-blown fluidized-bed gasification process. In the established model, fates of major elements (C, H, O, N, S, and Cl) and minor elements (Al, Ca, Fe, K, Mg, Mn, Na, P, Si, Ti, and Zn) are modeled separately. The composition of gaseous species involving major elements is predicted using Aspen Plus based on a semiempirical model. The release of minor elements and the condensation of inorganics are predicted using software SimuSage. The combination of Aspen Plus with SimuSage is achieved by manually inputting the stream parameters calculated from Aspen Plus into SimuSage. On the basis of this developed model, effects of gasification temperature on the condensation of Na-, K-, and Cl-containing species during gas cooling are studied. Results show that the process model established by combining Aspen Plus and SimuSage is valid and can be used to investigate the release of inorganics during gasification and condensation of inorganics during gas cooling. Under the investigated gasification conditions, regardless of the bed material, there are two temperature ranges within which no salt melt is formed during gas cooling. As the gasification temperature increases, the high-temperature range without salt melt formation becomes successively wider.

中文翻译:

加压流化床气化过程中无机物释放和冷凝的新模型:气化温度的影响

建立了一个模型,以研究木材蒸汽/吹氧流化床气化过程中无机物的释放和冷凝。在建立的模型中,主要元素(C,H,O,N,S和Cl)和次要元素(Al,Ca,Fe,K,Mg,Mn,Na,P,Si,Ti和Zn的命运)分别建模。基于半经验模型,使用Aspen Plus预测涉及主要元素的气态物质的组成。使用SimuSage软件可以预测微量元素的释放和无机物的缩合。通过将从Aspen Plus计算出的流参数手动输入到SimuSage中,可以实现Aspen Plus与SimuSage的结合。在此开发模型的基础上,研究了气化温度对气体冷却过程中含Na,K和Cl的物质凝结的影响。结果表明,结合Aspen Plus和SimuSage建立的过程模型是有效的,可用于研究气化过程中无机物的释放以及气体冷却过程中无机物的冷凝。在研究的气化条件下,无论床层材料如何,都有两个温度范围,在此温度范围内,气体冷却过程中不会形成盐熔体。随着气化温度的升高,没有形成盐熔体的高温范围逐渐变宽。在两个温度范围内,在气体冷却过程中不会形成盐熔。随着气化温度的升高,没有形成盐熔体的高温范围逐渐变宽。在两个温度范围内,在气体冷却过程中不会形成盐熔。随着气化温度的升高,没有形成盐熔体的高温范围逐渐变宽。
更新日期:2018-06-12
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