CAJ | 학술논문

煤炭直接液化油中含有种类丰富且数量可观的酚类化合物,研究影响酚类含量和组成的因素,对于深入研究煤液化产物中酚类化合物的生成机理具有重要的理论意义和实践意义.考察了煤液化过程中反应温度、催化剂及添加高分油三种工艺条件对煤液化油(41 ℃～220 ℃)中酚类含量分布的影响.结果表明:随着反应温度升高和催化剂加入都能增加煤液化油中总粗酚产率,而添加高分油方式则不太明显;另外,升高反应温度和添加高分油两种方式可以促进高级酚类中间体发生裂解、脱烷基及脱羟基等二次反应向生成分子量更小、结构更简单的低级酚类进行转化,而通过催化剂的加入可以抑制部分高级酚类向低级酚类的转化.
매탄직접액화유중함유충류봉부차수량가관적분류화합물,연구영향분류함량화조성적인소,대우심입연구매액화산물중분류화합물적생성궤리구유중요적이론의의화실천의의.고찰료매액화과정중반응온도、최화제급첨가고분유삼충공예조건대매액화유(41 ℃～220 ℃)중분류함량분포적영향.결과표명:수착반응온도승고화최화제가입도능증가매액화유중총조분산솔,이첨가고분유방식칙불태명현;령외,승고반응온도화첨가고분유량충방식가이촉진고급분류중간체발생렬해、탈완기급탈간기등이차반응향생성분자량경소、결구경간단적저급분류진행전화,이통과최화제적가입가이억제부분고급분류향저급분류적전화.
High-abundance content-rich phenolic compounds are formed in the direct coal liquefaction oil. It is crucial to investigate the factors that determine the contents and compositions of phenolic compounds, in order to understand better the mechanism how phenolic compounds are produced. In this paper, we study the effects of three process conditions, including reaction temperature,catalyst and addition of high boiling point oil, on the content distribution of phenolic compounds in a boiling 41 ℃-220 ℃ coal liquefaction oil. We have found out that both the addition of catalyst and the increase of reaction temperature lead to the enhanced yield of crude phenol while addition of high boiling oil has insignificant effect. In addition, both the increase of reaction temperature and addition of high boiling oil help convert high-level phenolic intermediates to lower-molecular-weight, simpler-structure, low-level phenols by means of cleavage, hydrodealkylation, and dehydroxylation. In contrast, the addition of catalyst greatly inhibits the transformation from higer phenols to low-grade phenolic.