Title: Impact of alkaline oxide on coal ash fusion temperature

Authors: Changlong Liu; Yonghui Bai; Lunjing Yan; Yongfei Zuo; Yulong Wang; Fan Li

Addresses: State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China ' State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China ' State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China ' State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China ' State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China ' State Key Laboratory Breeding Base of Coal Science and Technology, Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China

Abstract: Ash fusion temperature (AFT) is an important index for coal gasification. A blend of fluxing agent with coal can decrease the AFT to meet the requirements of specific gasification process. Effect of alkaline oxide and silica alumina ratio on decreasing AFT is focused in this study. Simulation ash was used to investigate the effect of alkaline oxide on AFT. The experimental results showed that AFT of simulation ash significantly decreased by adding single or composite fluxing agent of Fe₂O₃, CaO, Na₂O into it and the silica alumina ratio has specific effect on the AFT. The single or composite fluxing agent was also added to three coals with high AFT, consistent results were obtained. Biomass was blended to adjust the silica alumina ratio of high AFT coal and the AFT was evidently decreased. [Received: April 25, 2013; Accepted; October 2, 2013]

Keywords: alkaline oxide; coal ash; ash fusion temperature; AFT; coal gasification; fluxing agent; Fe2O3; CaO; Na2O; simulation; silica alumina ratio; biomass; iron oxide; calcium oxide; sodium oxide.

DOI: 10.1504/IJOGCT.2014.064427

International Journal of Oil, Gas and Coal Technology, 2014 Vol.8 No.1, pp.79 - 92

Received: 30 Apr 2013
Accepted: 02 Oct 2013
Published online: 18 Sep 2014 *

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