Investigation on sulfur transformation of Yangquan anthracite with various gas atmospheres

Document Type

Article

Publication Date

12-1-2001

Abstract

The investigation on sulfur transformation of Yangquan anthracite was carried out in a lab-scale fluidized bed reactor by thermo-chemical treatment including low temperature oxidation (LTO), high temperature pyrolysis and partial gasification (HTPG), and co-gasification with methane (CGM). It is found that sulfur in Yangquan anthracite can be quickly and selectively released into coal gas in the early stage of HTPG process and then released at the same rate of carbon in coal. Thus, char with lower sulfur and higher carbon recovery can be obtained at lower temperature and shorter residence time. Compared with HTPG method, the char with lower sulfur content can be obtained by LTO method. However, char with lower heat value was obtained although its weight and volatile matter content changed little. The newly-developed pre-desulfurization process of CGM can utilize coalbed methane to ensure a hydrogen-rich environment in gasifier to promote the coal sulfur release and meanwhile decrease heat loss of coal treated. And its sulfur release rate was greater than that of HTPG and LTO methods at the same carbon conversion rate. The futher work will be conducted to optimize operation conditions of CGM method.

Publication Source (Journal or Book title)

Journal of Fuel Chemistry and Technology

First Page

333

This document is currently not available here.

Share

COinS