溶剂供氢性对艾丁低阶煤直接液化低级酚生成的影响研究  

Study on the effect of solvent hydrogen supply on the lower phenol formation from the Aiding low rank coal direct liquefaction

作　　者：马博文 MA Bowen(Beijing Research Institute of Coal Chemistry,China Coal Research Institute Corporation Ltd.,Beijing 100013,China;National Energy Technology&Equipment Laboratory of Coal Utilization and Emission Control,Beijing 100013,China;State Key Laboratory of Coal Mining and Clean Utilization,Beijing 100013,China)

机构地区：[1]煤炭科学技术研究院有限公司煤化工分院,北京100013 [2]国家能源煤炭高效利用与节能减排技术装备重点实验室,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室,北京100013

出　　处：《煤质技术》2020年第4期48-51,57,共5页Coal Quality Technology

基　　金：国家重点研发计划资助项目(2017YFB0602803)。

摘　　要：低级酚的分离可提高煤炭直接液化的经济性且降低液化油后期加工的氢耗,从而增强煤炭直接液化技术的竞争力。配制不同比例的四氢萘、十氢萘混合溶剂并将其作为艾丁低阶煤直接液化的供氢溶剂,在高压釜四氢萘溶剂条件下进行艾丁低阶煤直接液化对比实验,以考察对低级酚生成的影响。研究结果表明:四氢萘与十氢萘比例为1∶1时,因溶剂供氢能力不足,煤液化反应发生结焦现象;当四氢萘与十氢萘比例为3∶1时,虽混合溶剂的供氢性比四氢萘溶剂降低,但反应取得了较好的效果,相比较完全四氢萘溶剂条件下粗酚产量能(IBP^230℃)明显提高,低级酚产量几乎相同,不同种类的低级酚产量略有差别,油产率、转化率出现了一定程度的上升,气产率略有下降。艾丁低阶煤加氢液化产物中的低级酚包括苯酚、邻甲酚、间甲酚、对甲酚、2,3-二甲酚、2,4-二甲酚、2,5-二甲酚、2,6-二甲酚、3,4-二甲酚和3,5-二甲酚,而十氢萘的加入虽减弱溶剂的供氢性,但未对低级酚产量产生明显影响。The separation of lower phenols can improve the economy of direct coal liquefaction and reduce the hydrogen consumption in the post-processing of liquefied oil,thereby enhancing the competitiveness of coal direct liquefaction technology.The mixed solvents of tetralin and decalin with different proportions were prepared and used as hydrogen supply solvent for direct liquefaction of Aiding low rank coal.The direct liquefaction comparison experiment of Aiding low rank coal was carried out to investigate the effect on the formation of lower phenols in the autoclave.The results show that when the ratio of tetralin to decalin is 1:1,coking occurs in coal liquefaction due to insufficient hydrogen supply capacity of solvent.When the ratio of tetralin to decalin is 3:1,although the hydrogen supply of the mixed solvent is lower than that of tetralin,the reaction has achieved better results.Compared with the total tetralin solvent,the yield of crude phenol(IBP-230℃)is significantly increased,the yield of lower phenols is almost the same,the yield of different kinds of lower phenols is slightly different,the oil yield and conversion rate increases to a certain extent,and the gas yield decreases slightly.The lower phenols in the liquefaction products of Aiding coal include phenol,o-cresol,m-cresol,p-cresol,2,3-xylenol,2,4-Xylenol,2,5-xylenol,2,6-xylenol,3,4-xylenol and 3,5-Xylenol.Although the addition of decalin weakens the hydrogen supply capacity of the solvent,it has no obvious effect on the production of low-grade phenol.

关 键 词：低级酚 供氢溶剂 煤直接液化 四氢萘 十氢萘 油产率 转化率 

分 类 号：TQ529.1[化学工程—煤化学工程]