| 咪唑基离子液体用于天然气脱水过程中的技术-环境评价 |
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| 引用本文： | 王佳琪,代成娜,于刚强,武斌,刘宁,徐瑞年,王宁,陈标华.咪唑基离子液体用于天然气脱水过程中的技术-环境评价[J].环境工程,2022,40(11):199-210. |
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| 作者姓名： | 王佳琪 代成娜 于刚强 武斌 刘宁 徐瑞年 王宁 陈标华 |
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| 作者单位： | 北京工业大学 环境与生命学部, 北京 100020 |
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| 基金项目： | 国家自然科学基金（22008003；22178009） |
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| 摘 要： | 利用Aspen Plus建立离子液体天然气脱水的工艺流程模拟，结合灵敏度分析及生命周期评价方法，对该工艺应用不同离子液体产生的技术及环境影响进行比较，并分析离子液体结构对天然气脱水工艺技术及环境评价的影响。结果表明:与烷基链较短的阳离子结合的BF4]-离子液体具有较好的脱水性能（EMIM]BF4]>BMIM]BF4]>OMIM]BF4]）；对于生产1 kg甲烷气体而言，BMIM]PF6]脱水法的环境影响最大，达到OMIM]BF4]脱水法环境影响的5倍；此外，对于具有相同阴离子BF4]-的脱水情况，环境影响顺序为OMIM]BF4]4]4]。该结果从技术和环境评价的角度为筛选或开发天然气脱水过程中选择适当的离子液体提供了指导。
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| 关 键 词： | 天然气脱水 过程模拟 离子液体 生命周期评价 能量分析 |
| 收稿时间： | 2021-11-19 |
TECHNO-ENVIRONMENTAL ASSESSMENT IN NATURAL GAS DEHYDRATION WITH IMIDAZOLIUM-BASED IONIC LIQUIDS |
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| Affiliation: | Faculty of Environment and Life, Beijing University of Technology, Beijing 100020, China |
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| Abstract: | The process flow simulation of imidazolium-based ionic liquids (ILs) used for natural gas (NG) dehydration was established by Aspen Plus. Technological and environmental impacts of different ILs in the NG dehydration process were compared by using the sensitivity analysis and life cycle assessment (LCA), and the IL structural effect on techno-environmental assessment in NG dehydration was evaluated. The results demonstrated that the ILs withBF4]- combined with the cation possessing the shorter alkyl chain exhibited better dehydration performance (the order followingEMIM] BF4]>BMIM] BF4]>OMIM] BF4]). For producing 1 kg methane, the largest environmental impact lay in theBMIM] PF6] based dehydration process, and its impact was 5 times the lowest scenario usingOMIM] BF4] on average. Furthermore, for the dehydration scenarios with same anionsBF4]-, the impact order wasOMIM] BF4]4]4]. The results can serve as a significant guidance strategy from both the technical and environmental assessment on screening or developing proper IL candidates for NG dehydration processes. |
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