Hybrid Membrane/Absorption-Adsorption separation of Hydrogen-Blended natural gas at receiving Terminal: Process Modelling and Multi-Objective optimization

IF 8.1 1区 工程技术 Q1 ENGINEERING, CHEMICAL
Ninghan Gao, Xiang Mao, Nan Nan, Tianqing Zhang, Bei Liu, Changyu Sun, Guangjin Chen, Chun Deng
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引用次数: 0

Abstract

Hydrogen energy is an important, abundant, green, low-carbon, and widely applicable source. Using natural gas pipelines for long-distance hydrogen transportation is expected to become a significant hydrogen transport method. Therefore, efficiently recovering hydrogen at the pipeline terminal is particularly critical, with the core challenge being the effective separation of H2/CH4. Traditional methods, such as single-stage membrane separation and fixed-bed pressure swing adsorption, struggle to purify low-concentration hydrogen with a high hydrogen recovery ratio efficiently. This study proposes a hybrid membrane/absorption-adsorption separation process. Mathematical models have been constructed for the membrane separation unit, the absorption-adsorption separation unit, and the hybrid membrane/absorption-adsorption separation process. The suitable ranges of operating parameters are determined using sensitivity analysis. Next, a multi-objective optimization model is used to optimize operating parameters, maximize the hydrogen recovery ratio, and minimize energy consumption. Results show that the H2 concentration in product gas can be enriched from 20 to 99.97 mol%, the hydrogen recovery ratios ranges from 98 to 98.93 %, and the energy consumption per unit of feed gas ranges from 0.2233 to 0.2757 kW⋅h−1/Nm3, while the energy consumption per unit of product gas ranges from 0.9417 to 1.1611 kW⋅h−1/Nm3 under different scenarios at the natural gas receiving station.
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来源期刊
Separation and Purification Technology
Separation and Purification Technology 工程技术-工程:化工
CiteScore
14.00
自引率
12.80%
发文量
2347
审稿时长
43 days
期刊介绍: Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.
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