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OALib Journal期刊
ISSN: 2333-9721
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煤焦油重组分沥青质性质分析及对加氢裂化生焦影响的推测
, PP. 938-944
Keywords: 中/低温煤焦油,重组分加氢,正庚烷沥青质,结构参数,缩合生焦
Abstract:
？从中/低温煤焦油中切取重组分，提取了重组分c7-沥青质，并以此重组分为原料进行了高压釜加氢实验，通过1h-nmr、xrd、ft-ir、sem、元素分析和相对分子量测定等手段对重组分沥青质结构参数、官能团、表观形态等方面进行了分析，并将其与加氢过程中生焦情况进行了关联。结果表明，c7-沥青质基本结构单元以稠环芳烃为中心，周围分布少而短的侧链，侧链以小于3个碳的短直链正构烷基为主，相对分子量小，芳香片层没有堆积结构。o是该沥青质中氢键主要来源，大多分布在环氧烷烃和醚类结构中，外围的o数量低，分子间氢键更难形成，结构单元之间缔合性弱，沉积聚合慢而均匀。沥青质中短侧链不易断裂，在反应过程中产生的稠环芳烃自由基少，缩合能力小，使该馏分油生焦能力低，具有较高的加氢潜质。
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