煤催化气化工艺中含碱灰渣对不同耐火材料的腐蚀性研究

doi:10.11896/cldb.19070148

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Abstract Six refractories were selected for erosion investigation under simulated catalytic coal gasification atmosphere. The changes of composition, phase and refractory structure before and after the reaction were characterized by using scanning electron microscope (SEM) and energy spectrum analysis, X-ray diffraction (XRD) analysis. The results showed that corundum refractories could resist alkali corrosion better, and alkali corrosion resistance of high purity corundum was weaker than that of magnesia-alumina spinel and wollastonite under catalytic coal gasification condition. Chromium-containing refractories used in catalytic gasification process had greater safety risks. Trivalent chromium reacted with alkali metals at oxidative atmosphere and converted into toxic and leachable potassium chromate. SiC series refractories had great risks when used in oxygen-containing atmosphere of catalytic gasification process. It was not recommended to use SiC series refractories in oxygen-containing area of gasifier. The alkaline refractory - high purity magnesium oxide had good alkali corrosion resistance. There was no obvious chemical reaction occurred between refractory and alkali gasification ash under the condition of catalytic coal gasification.

Key words： catalytic coal gasification alkali corrosion gasification ash containing alkali refractory

Published: 06 November 2020

CLC number:	TQ54
	TQ51

Fund:National Key Technology R&D Program of China (2009BAA25B00) and the National Basic Program Research of China (2011CB201305).

About author:: Yandong Maoreceived her Ph.D. degree in chemical engineering from Tianjin University, and joined as se-nior engineer in ENN Technology Development Co. in 2008. She participates in the development of coal gasification process. Her research interests are research and development of catalytic coal gasification process and key devices. She has published more than 20 articles in important journals and applied for more than 120 patents.

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Cite this article:

MAO Yandong,LIU Lei,LI Kezhong. Corrosivity of Alkali-containing Ash Slag on Different Refractories in Catalytic Coal Gasification Process[J]. Materials Reports, 2020, 34(20): 20061-20065.

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http://www.mater-rep.com/EN/10.11896/cldb.19070148 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20061

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