聚乙烯亚胺萃取脱除模型燃油中氮化物的研究 |
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引用本文: | 朱 爽,朱海艳,全苇舟,姜兴茂,高家俊.聚乙烯亚胺萃取脱除模型燃油中氮化物的研究[J].武汉工程大学学报,2020,42(5):483-486. |
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作者姓名: | 朱 爽 朱海艳 全苇舟 姜兴茂 高家俊 |
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作者单位: | 绿色化工过程省部共建教育部重点实验室(武汉工程大学),新型反应器与绿色化学工艺湖北省重点实验室(武汉工程大学),武汉工程大学化工与制药学院,湖北 武汉 430205 |
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摘 要: | 为了解决燃油中的氮化物,尤其是碱性氮化物,对生态环境、油品品质和催化剂性能等的不利的影响,采用聚乙烯亚胺(PEI)为萃取剂,可同时脱除模型燃油中的非碱性氮化物和碱性氮化物。结果表明,在常压、萃取时间15 min、萃取温度30 ℃、剂油质量比0.1的条件下,PEI对吲哚和吡咯的N-脱除率分别高达97.8%、 95.1%,喹啉只有28.8%,吡啶的N-脱除率为85.1%。进一步地,PEI对吲哚、吡咯、喹啉和吡啶的N-分配系数分别为368、161、3.5和47.5。良好的脱氮性能源于PEI与氮化物之间形成的氢键作用,该作用可由1H-NMR所证实。此外,PEI可通过乙醚反萃再生,重复使用5次对萃取性能没有明显降低。
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关 键 词: | 聚乙烯亚胺 萃取脱氮 非碱性氮 碱性氮 |
Extractive Removal of Nitrides from Model Fuel by Polyethylimine |
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Authors: | ZHU Shuang ZHU Haiyan QUAN Weizhou JIANG Xingmao GAO Jiajun |
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Affiliation: | Key Laboratory for Green Chemical Process(Wuhan Institute of Technology), Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor & Green Chemical Technology(Wuhan Institute of Technology), School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430205, China |
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Abstract: | Nitrides in fuel oils, especially basic nitrides, have adverse effects on ecological environment, oil quality and catalyst performance. Polyethylimine (PEI), used as extractant in this work, can simultaneously remove non-basic and basic nitrides from fuel oils. Experimental results indicated that, under the conditions [ambient pressure,30 ℃, 15 min, m(extractant)/m(oil)= 1/10], N-removal of PEI was 97.8% for indole, 95.1% for pyrrole, 28.8% for quinoline, and 85.1% for pyridine, respectively. Further, N-distribution coefficient of PEI can amount to 368 for indole, 161 for pyrrole, 3.5 for quinoline, and 47.5 for pyridine, respectively. The good denitrogenation performance was ascribed to H-bonding between PEI and thenitride. The H-bonding can be identified by 1H nuclear magnetic resonance spectroscopy. Moreover, PEI can be regenerated by ether stripping, and its extractive performance is not significantly reduced for reusing 5 times. |
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Keywords: | polyethylimine extractive denitrogenation non-basic nitrogen basic nitride |
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