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材料导报  2020, Vol. 34 Issue (20): 20061-20065    https://doi.org/10.11896/cldb.19070148
  无机非金属及其复合材料 |
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
毛燕东, 刘雷, 李克忠
新奥科技发展有限公司煤基低碳能源国家重点实验室,廊坊 065001
Corrosivity of Alkali-containing Ash Slag on Different Refractories in Catalytic Coal Gasification Process
MAO Yandong, LIU Lei, LI Kezhong
State Key Lab of Coal-based Low Carbon Energy, Enn Technology & Development Co. Ltd, Langfang 065001, China
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摘要 采用催化气化中试装置得到的含碱气化灰渣为实验原料,在催化气化工况气氛下考察其对不同耐火材料的腐蚀情况,为催化气化工业化气化炉内衬材质的选择及优化提供数据指导。本研究选取了六种耐火材料,模拟催化气化工况气氛进行侵蚀性考察,结合SEM 及XRD分析等表征手段,观察反应前后成分、物相及耐火材料结构等的变化,考察是否有腐蚀发生。结果表明,刚玉质耐材能较好地抵抗碱腐蚀,高纯刚玉在催化气化工况气氛下耐碱腐蚀性能相比镁铝尖晶石及黑铝钙石较弱;铬刚玉耐材用于催化气化工艺存在较大的安全风险,三价铬在有氧气氛下同碱金属反应转化为有毒易流失的铬酸钾;SiC系耐材用于催化气化工艺在含氧气氛时存在较大的风险,不建议在气化炉含氧区域使用;碱系耐材-高纯氧化镁具有较好的耐碱腐蚀性能,在催化气化工况气氛下,与含碱灰渣接触未发生明显的化学反应。
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毛燕东
刘雷
李克忠
关键词:  催化气化  碱腐蚀  含碱灰渣  耐火材料    
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
               出版日期:  2020-10-25      发布日期:  2020-11-06
ZTFLH:  TQ54  
  TQ51  
基金资助: 国家科技支撑计划(2009BAA25B00);国家重点基础研究发展规划(2011CB201305)
通讯作者:  nyyjy@enn.cn   
作者简介:  毛燕东,新奥科技发展有限公司,高级工程师,天津大学化学工程专业博士。2008年加入新奥科技发展有限公司工作至今,主要从事煤气化工艺的研发,重点研究煤催化气化制备合成天然气工艺及关键系统研究。在国内外重要期刊发表文章20多篇,申报专利120余项。
引用本文:    
毛燕东, 刘雷, 李克忠. 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[J]. 材料导报, 2020, 34(20): 20061-20065.
MAO Yandong, LIU Lei, LI Kezhong. Corrosivity of Alkali-containing Ash Slag on Different Refractories in Catalytic Coal Gasification Process. Materials Reports, 2020, 34(20): 20061-20065.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19070148  或          http://www.mater-rep.com/CN/Y2020/V34/I20/20061
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