Reaction performance and energy consumption analysis of high-purity hydrogen production system of in-situ CO2 absorption enhanced aqueous phase reforming of methanol

被引：0

作者：

Tian, Zhipeng ^{[1
,2
]}

Huang, Zilong ^{[1
,2
]}

Huang, Jiahao ^{[2
,3
]}

Shu, Riyang ^{[1
]}

Wang, Junyao ^{[1
,2
]}

Wang, Chao ^{[1
]}

Chen, Ying ^{[1
]}

机构：

[1] Guangdong Univ Technol, Sch Mat & Energy, Guangdong Prov Key Lab Funct Soft Condensed Matter, Guangzhou 510006, Peoples R China

[2] Guangdong Univ Technol, Smart Energy Res Ctr, Sch Mat & Energy, Guangzhou 510006, Peoples R China

[3] Foshan Inst Environm & Energy Technol, Foshan 528000, Peoples R China

来源：

JOURNAL OF CLEANER PRODUCTION | 2024年 / 484卷

基金：

中国国家自然科学基金;

关键词：

Aqueous phase reforming; In-situ CO 2 absorption; High-purity hydrogen production; Energy consumption analysis; CATALYST; GLYCEROL; IMPURITIES; WATER; KOH;

D O I：

10.1016/j.jclepro.2024.144340

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

High-purity hydrogen was efficiently produced through an environmentally conscious process that combines aqueous phase reforming of methanol (APRM) with in-situ CO2 absorption. By integrating La-promoted Ni-based catalysts derived from layered double hydroxides (LDHs) with CO2 capture technology, the system not only enhanced hydrogen yield but also suppressed the formation of undesired by-products. The introduction of alkali into APRM process resulted in significant increase in methanol conversion, hydrogen production rate and hydrogen concentration in gas phase product, attributed to an equilibrium shift towards the forward APRM reaction, facilitated by in-situ CO2 absorption. This shift also suppressed the methanation reaction and improved catalyst stability. Optimal conditions were identified based on the calcination temperature of catalyst, the temperature of reactions and the molar ratio of methanol to KOH in substrate. Energy consumption analysis across three different systems demonstrated that the APRM system with in-situ CO2 absorption by KOH exhibited lower energy consumption (78.87 kJ/mol-H2) and greater viability for practical applications. Future perspectives for process development are also discussed, with a focus on improving reaction efficiency, reducing energy consumption, recycling alkali, and extending catalyst life.

引用

页数：13

共 44 条

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