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OALib Journal期刊
ISSN: 2333-9721
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酸洗脱矿对胜利褐煤热解过程中n迁移转化的影响
, PP. 519-526
Keywords: 褐煤,热解,氮,碱金属,碱土金属
Abstract:
？在石英管流化床反应器中对胜利褐煤进行快速热解实验，考察了773~1173k下酸洗脱矿对胜利褐煤热解过程中n迁移转化规律的影响。通过比较原煤和酸洗后煤中n的不同逸出规律可以得出，影响酸洗前后胜利褐煤热解过程中n迁移转化规律的主要是碱金属na及碱土金属ca；热解过程中，煤中的na和ca促使煤中的n向nh3转化并有效抑制了hcn的生成，金属离子的存在对催化焦油n转化为nh3的作用较为明显；原煤中的碱金属和碱土金属的赋存使半焦裂解反应加剧，降低了固体半焦的产率，半焦n的产率也随之减少；与原煤相比，酸洗煤热解半焦中的吡啶型n（n-6）含量较多，而吡咯型n（n-5）和季n（n-q）相对较少。
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