Mathematical modeling of proton-conducting electrochemical cells for ethylene production from ethane

被引:4
作者
Lei, Libin [1 ]
Ou, Yongzhen [1 ]
Qiu, Ruiming [1 ]
Lian, Wenchao [1 ]
Mo, Yingyu [1 ]
Zhang, Jihao [2 ]
Shi, Zhicong [1 ]
Liu, Jianping [1 ]
Wang, Chao [1 ,3 ]
Chen, Ying [3 ]
机构
[1] Guangdong Univ Technol, Sch Mat & Energy, Smart Energy Res Ctr, Guangzhou 510006, Peoples R China
[2] China Univ Min & Technol, Sch Elect & Power Engn, Xuzhou 221116, Peoples R China
[3] Guangdong Univ Technol, Sch Mat & Energy, Guangdong Prov Key Lab Funct Soft Condensed Matte, Guangzhou 510006, Peoples R China
基金
中国国家自然科学基金;
关键词
Proton-conducting electrochemical cells; Proton-conducting solid oxide fuel cells; Ethylene production; Electrochemical model; OXIDE FUEL-CELL; CERAMIC FUEL; ANODE; PERFORMANCE; HYDROGEN;
D O I
10.1016/j.jpowsour.2022.231272
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The efficient conversion of ethane to ethylene in proton-conducting electrochemical cells (PCECs) is an emerging technology, garnering considerable research attention. However, the absence of modeling study concerning PCECs for ethylene production leads to limited fundamental and quantitative understandings of electrochemical/energy performance of the system. Aimed to fill this gap, an electrochemical model of PCECs is developed in this study. The electrochemical performance, Faraday efficiency, and energy performance of PCECs in the fuel cell mode and hydrogen pump mode are evaluated and compared. It is demonstrated that the decline of Faraday efficiency, caused by the current leakage within the electrolyte layer, is a problem in the fuel cell mode, rather than in the hydrogen pump mode. In addition, electric energy has a larger effect on the energy performance in the fuel cell mode than in the hydrogen pump mode. As a result of the combined effect of Faraday efficiency and electric energy, higher energy efficiency is achieved in the hydrogen pump mode. Moreover, introducing steam to the anode side is found to be beneficial for the conversion of ethane and the electrochemical performances of PCECs, mainly owing to the positive effect of humidity on the proton conductivity of electrolytes.
引用
收藏
页数:12
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