TITLE:
Experiment Research on Gasification Character of Pulve-rized Coal at Medium Temperature
AUTHORS:
Tong Lou, Zhong-xiao Zhang, Jun-jie Fan, Hai-quan An, Zhi-hao Zhou, Pu-jie Yue
KEYWORDS:
Gasification Characteristic; Pulverized Coal; Carbon Conversion; Cold Gas Efficiency
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
October
16,
2013
ABSTRACT: In this paper, effect of gasification temperature and residence time on gasification characteristics of typical pulverized coals under atmosphere pressure were studied on a one-dimensional electric heating drop tube furnace system to evaluate gasification characteristics of pulverized coal at medium temperature. The results show that the gasification rate increases with the raising of the gasification temperature under the temperature among 1150℃and1450℃, and as the temperature is above1350℃, the increasing rate become slower. Cold gas efficiencyandcarbon conversion meet the maximum value when the temperature approaches the ash fusion point of coal. With the further rise of the temperature, ash on the surface of the char starts to be melted,the gasification reaction rate decreases, due to the hindrance of the effective contact between coal char and gasification agent. The gasification efficiency would become steady when the residence time exceeds 8s.