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OALib Journal期刊
ISSN: 2333-9721
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煤焦油重组分甲苯不溶物结构组成及对悬浮床加氢裂化生焦的影响
, PP. 923-931
Keywords: 煤焦油重组分,悬浮床加氢,甲苯不溶物,生焦
Abstract:
？以煤焦油常压渣油(ctar)为原料在3000ml环流反应器悬浮床加氢装置上进行了中试实验,并分别从ctar和加氢产物中提取了甲苯不溶物(ti)及焦炭,通过元素分析、sem、xrd、ft-ir、xps等手段对ti及焦炭进行对比分析,明确了ti的结构组成并将其与加氢裂化生焦情况进行了关联。结果表明,ctar悬浮床加氢工艺具有轻油收率高、生焦总量小、没有壁相焦的特点。ti由煤焦油生产过程中带入的碳质、矿物质颗粒及稠环芳烃有机物构成,o是其中含量最高的杂原子,ca、si、al、na来源于煤焦油中矿物质,c和o主要存在于c-c、c-h、c-o-c、c-oh结构中,n主要以吡咯和胺的形式存在,s主要以脂肪类s存在。ti具有明显的片层堆积结构,在作用力下容易破碎为具有较大比表面积及吸附能力的微米级微晶及碳质颗粒,和硫化后的催化剂颗粒一起为加氢反应提供载焦中心,优先吸附大分子自由基从而明显减少壁相焦的生成。
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