Study of Effect of Ternary-Component Blended Coal on Coal Gasification Reaction at High Temperature

Abstract:

Three typical Chinese individual coals which existed remarkable difference on coal ash chemical composition and ash fusion temperature were selected to carry out coal blending experiments to study the coal gasification reaction at high temperature by means of using ternary-component blended coal technique and TGA-DTA method. According to ternary-component blended coal with a certain proportion, ash chemical composition and coal-char/CO2 gasification reactivity were analyzed by X-ray fluorescence (XRF) and thermogravimetric analysis-derivative thermogravimetric analysis (TGA-DTG), respectively. The results show that the ash chemical components change because ternary-component blended coals change the mineral composition, and hence, the gasification reactivity can be affected as well. Moreover, in accordance with reactivity index R, it indicates that the order of gasification reactivity of three individual coals and four blended coal options is coal x > option B > option A > option D > option C > coal z >coal y. Meanwhile, a new mathematical model called per unit ash alkali index B* was established by using the ash chemical component dates, which has a good corresponding relationship with R for four blending coal options. Utilizing ternary-component blended coal technique could improve the high-temperature coal ash gasification reaction.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 3104-3109
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.3104
• Online since: February 2013
• Authors: Han Xu Li, Xiang Cao, Yong Xin Tang
• Keywords: Ash Chemical Component, Gasification Reactivity, Ternary-Component Blended Coal

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