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作者:

Wu, Bin (Wu, Bin.) | Dai, Chengna (Dai, Chengna.) | Chen, Biaohua (Chen, Biaohua.) (学者:陈标华) | Yu, Gangqiang (Yu, Gangqiang.) | Liu, Ning (Liu, Ning.) | Xu, Ruinian (Xu, Ruinian.)

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摘要:

The life cycle environmental sustainability of the natural gas (NG) dehydration process using novel dehydrant [EMIM][Tf2N] ionic liquid (IL) has been evaluated using a "cradle to grave" life cycle assessment (LCA) methodology, and the results were compared with the traditional dehydrant triethylene glycol (TEG). The LCA results of [EMIM][Tf2N] production indicate that the precursors' production stage is the main hotspot that contributes to most of the environmental burdens. Meanwhile, compared with cation production, the anion production has higher environmental impacts (about 69.8% on average) in most of the categories except human toxicity potential (HTP) and freshwater aquatic ecotoxicity potential (FAETP). The comparative LCA results show that the NG dehydration with [EMIM] [Tf2N] has significantly higher environmental impacts than TEG in all categories, but the TEG-based scenario shows worse impacts than the [EMIM] [Tf2N] in the use stage (about 4.5 times higher). Moreover, the sensitivity analysis proved that the dehydrant recovery ratio is a crucial parameter. When considering the dehydrant recovery, the environmental impacts are comparable for [EMIM] [Tf2N] and TEG-based NG dehydration processes. This study can give guidance on novel material synthesis and process improvement from the life cycle perspective, and encourage further research on the potential of employing novel IL as traditional NG dehydrant alternatives.

关键词:

natural gas dehydration volatile organic solvent ionic liquid material and energy flow life cycle assessment

作者机构:

  • [ 1 ] [Wu, Bin]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China
  • [ 2 ] [Dai, Chengna]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China
  • [ 3 ] [Chen, Biaohua]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China
  • [ 4 ] [Yu, Gangqiang]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China
  • [ 5 ] [Liu, Ning]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China
  • [ 6 ] [Xu, Ruinian]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China

通讯作者信息:

  • [Dai, Chengna]Beijing Univ Technol, Coll Environm & Energy Engn, 100 Ping Yuan, Beijing 100124, Peoples R China

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来源 :

ACS SUSTAINABLE CHEMISTRY & ENGINEERING

ISSN: 2168-0485

年份: 2019

期: 23

卷: 7

页码: 19194-19201

8 . 4 0 0

JCR@2022

ESI学科: CHEMISTRY;

ESI高被引阀值:166

JCR分区:1

被引次数:

WoS核心集被引频次: 29

SCOPUS被引频次: 30

ESI高被引论文在榜: 0 展开所有

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