乙醇辅助碳氢燃料催化吸热裂解反应的初步研究

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• 英文论文题名：Investigation on ethanol promoted endothermic catalytic cracking of hydrocarbon fuels
• 论文作者：许国梁 ; 丛昱 ; 吴春田 ; 陈帅 ; 杜健 ; 王晓东 ; 张涛
• 英文论文作者：Guoliang Xu ; Yu Cong ; Chuntian Wu ; Shuai Chen ; Jian Du ; Xiaodong Wang ; Tao Zhang ; Dalian Institute of Chemical Physics ; Chinese Academy of Sciences
• 年：2016
• 作者机构：中国科学院大连化学物理研究所;
• 论文关键词：碳氢燃料 ; 乙醇 ; 催化吸热裂解 ; 热沉
• 英文论文关键词：Hydrocarbon fuel ; Ethanol ; Endothermic catalytic cracking ; Heat-sink
• 会议召开时间：2016-07-01
• 会议录名称：中国化学会第30届学术年会摘要集-第四十六分会：燃烧化学
• 语种：中文
• 分类号：TQ511
• 学会代码：ZGHY
• 会议名称：中国化学会第30届学术年会-第四十六分会 ; 燃烧化学
• 会议地点：中国辽宁大连
• 主办单位：中国化学会
• 学会名称：中国化学会
• 页数：1
• 文件大小：118k
• 原文格式：D
• 会议级别：全国

摘要

利用自带航空燃料催化吸热裂解进行主动冷却是解决高速飞行器热管理问题的有效手段。燃料一般由C_8-C_(16)的烷烃和环烷烃组成,在大空速主动换热条件下,其起始裂解温度通常在500 ℃以上。而当温度高于650 ℃时,积炭生成又较为明显,这导致实际可用的化学热沉有限。鉴于文献中醇助剂可有效促进重油裂解增产烯烃的研究,我们引入乙醇作为第二反应物,以期在单相进料条件下促进催化裂解、提高吸热性能。本工作以EHF-01煤油为原料,在电加热单管评价装置上考察了催化剂种类、不同乙醇添加量(2-55wt%)对反应性能的影响。结果表明,乙醇的引入有利于提高反应活性、烯烃产物选择性和化学热沉,分子筛型催化剂对乙醇/燃料体系的催化裂解促进作用较为明显,起始裂解温度可降至400 ℃以下。乙醇添加量增加对提高燃料的低温热沉作用明显,但高温时(650 ℃以上)存在热沉下降、积炭增加的问题,进一步研究工作正在进行中。
Actively cooling process using endothermic catalytic cracking reaction of the onboard hydrocarbon fuels is an effective way to solve the thermal-management problems for advanced flights. As the fuels are mainly composed with paraffins and naphthenes, which are not easily to be cracked, the initial reaction temperatures of the fuels are generally higher than 500 ℃ under the simulated reaction conditions. Thus the obtained chemical heatsink is limited. To solve the problem, we introduced ethanol as the second reactant, aiming at reducing the reaction barrier, improving the endothermic performance with the single-phase feedstocks. The reaction performances were investigated on an electrically heated single-tube reaction evaluation apparatus with a series of catalysts as well as ethanol adding proportions. The results demonstrated that zeolitic coating catalysts were rather effective. The cracking activity and the reaction heatsink, especially in the low temperature range, were effectively enhanced with the addition of ethanol. However, the catalytic performances at higher temperatures(above 650 ℃) need further improvement.

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