Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas

doi:10.1016/j.cjche.2022.09.020

中国化学工程学报 ›› 2023, Vol. 57 ›› Issue (5): 290-308.DOI: 10.1016/j.cjche.2022.09.020

• Full Length Article • 上一篇下一篇

Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas

Jixiang Liu¹, Xin Zhou^1,2, Gengfei Yang¹, Hui Zhao¹, Zhibo Zhang¹, Xiang Feng¹, Hao Yan¹, Yibin Liu¹, Xiaobo Chen¹, Chaohe Yang¹

1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China;
2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

收稿日期:2022-06-24 修回日期:2022-09-18 出版日期:2023-05-28 发布日期:2023-07-08
通讯作者: Xin Zhou,E-mail:xinzhou@ouc.edu.cn;Hui Zhao,E-mail:zhaohui@upc.edu.cn
基金资助:
Special thanks from the authors for the assistance and support from the National Natural Science Foundation of China (22108307).

Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas

Jixiang Liu¹, Xin Zhou^1,2, Gengfei Yang¹, Hui Zhao¹, Zhibo Zhang¹, Xiang Feng¹, Hao Yan¹, Yibin Liu¹, Xiaobo Chen¹, Chaohe Yang¹

1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China;
2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China

Received:2022-06-24 Revised:2022-09-18 Online:2023-05-28 Published:2023-07-08
Contact: Xin Zhou,E-mail:xinzhou@ouc.edu.cn;Hui Zhao,E-mail:zhaohui@upc.edu.cn
Supported by:
Special thanks from the authors for the assistance and support from the National Natural Science Foundation of China (22108307).

摘要/Abstract

摘要： The direct emission of waste refinery gas after combustion will cause a severe greenhouse effect. Recovering high-value-added ethylene from wasted refinery gas has fundamental economic and environmental significance. Due to the complexity of the composition of refinery waste gas, designing and optimizing the whole recovery process is still a challenging task. Herein, a novel process (SCOAS) was proposed to obtain polymer-grade ethylene from wasted refinery gas through a direct separation process, and heat pump-assisted thermal integration optimization (HPSCOAS) was carried out. The unique feature of the novel approach is that a new stripper and ethylene reabsorber follow the dry gas absorber to ensure ethylene recovery and methane content. An industrial model, shallow cooling oil absorption (SCOA), and concentration combined cold separation system of ethylene unit using wasted refinery gas was established to analyze the technology and environment. Based on the detailed process modeling and simulation results, the quantitative sustainability assessment of economy and environment based on product life cycle process is carried out. The results show that compared with the traditional process when the same product is obtained, the total annual cost of the HPSCOAS process is the lowest, which is 15.4% lower than that of the SCOA process and 6.1% lower than that of the SCOAS process. In addition, compared with the SCOA process and the HPSCOAS process, the SCOAS process has more environmental advantages. The non-renewable energy consumed by SCOAS is reduced by about 24.8% and 6.1%, respectively. The CO₂ equivalent is reduced by about 38.6% and 23.7%.

关键词: Wasted treatment, Computer simulation, Optimal design, Carbon-reduction, Life cycle environment assessment

Abstract: The direct emission of waste refinery gas after combustion will cause a severe greenhouse effect. Recovering high-value-added ethylene from wasted refinery gas has fundamental economic and environmental significance. Due to the complexity of the composition of refinery waste gas, designing and optimizing the whole recovery process is still a challenging task. Herein, a novel process (SCOAS) was proposed to obtain polymer-grade ethylene from wasted refinery gas through a direct separation process, and heat pump-assisted thermal integration optimization (HPSCOAS) was carried out. The unique feature of the novel approach is that a new stripper and ethylene reabsorber follow the dry gas absorber to ensure ethylene recovery and methane content. An industrial model, shallow cooling oil absorption (SCOA), and concentration combined cold separation system of ethylene unit using wasted refinery gas was established to analyze the technology and environment. Based on the detailed process modeling and simulation results, the quantitative sustainability assessment of economy and environment based on product life cycle process is carried out. The results show that compared with the traditional process when the same product is obtained, the total annual cost of the HPSCOAS process is the lowest, which is 15.4% lower than that of the SCOA process and 6.1% lower than that of the SCOAS process. In addition, compared with the SCOA process and the HPSCOAS process, the SCOAS process has more environmental advantages. The non-renewable energy consumed by SCOAS is reduced by about 24.8% and 6.1%, respectively. The CO₂ equivalent is reduced by about 38.6% and 23.7%.

Key words: Wasted treatment, Computer simulation, Optimal design, Carbon-reduction, Life cycle environment assessment

Jixiang Liu, Xin Zhou, Gengfei Yang, Hui Zhao, Zhibo Zhang, Xiang Feng, Hao Yan, Yibin Liu, Xiaobo Chen, Chaohe Yang. Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas[J]. 中国化学工程学报, 2023, 57(5): 290-308.

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Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas

Conceptual carbon-reduction process design and quantitative sustainable assessment for concentrating high purity ethylene from wasted refinery gas

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