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Facile hydrogen production from Al-water reaction promoted by choline hydroxide
Wang, Hongqi1,2; Wang, Zhi1; Shi, Zhihao1; Gong, Xuzhong1; Cao, Jianwei1; Wang, Mingyong1
Source PublicationENERGY

Choline hydroxide was used to accelerate the Al-water reaction to produce hydrogen efficiently and steadily, with only water and aluminum consumption. The effects of parameters such as initial aluminum mass, alkali concentration and temperature on the reaction rate and yield were studied. Compared with the average value 52.55 kJ/mol of other activation methods, the apparent activation energy of 45.92 kJ/mol indicates that choline hydroxide can promote the reaction significantly. The mechanism analysis demonstrates that the dissociation equilibrium of choline hydroxide (pK(b) = 1.3) can restrict the complete dissociation in the initial reaction stage and accelerate the regeneration of OH- in the latter stage. Compared with the NaOH (pK(b) = 0.2) under the same condition, the choline hydroxide is less corrosive. The dissociation equilibrium of choline hydroxide was also verified by the HSAB theory. The average hydrogen generation rate activated by choline hydroxide is as fast as that of NaOH. The standard deviation of hydrogen generation rate of choline hydroxide is 78.7 mL/min, lower than that of NaOH being 108.3 mL/min, indicating the stability by choline hydroxide. Therefore, the application of choline hydroxide can produce hydrogen for fuel cells due to its weak corrosion and stable supplement of OH-. (C) 2017 Elsevier Ltd. All rights reserved.

KeywordHydrogen Production Al-water Reaction Choline Hydroxide Fuel Cell
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
Indexed BySCI
WOS KeywordFuel-cell Applications ; Aqueous Naoh Solutions ; Aluminum Corrosion ; Sodium-borohydride ; Generation ; Dissolution ; Alloys ; Feasibility ; Oxidation ; Catalyst
WOS Research AreaThermodynamics ; Energy & Fuels
WOS SubjectThermodynamics ; Energy & Fuels
Funding OrganizationNational Natural Science Foundation of China(51422405 ; 51374192)
WOS IDWOS:000403996700010
Citation statistics
Cited Times:22[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Wang, Hongqi,Wang, Zhi,Shi, Zhihao,et al. Facile hydrogen production from Al-water reaction promoted by choline hydroxide[J]. ENERGY,2017,131:98-105.
APA Wang, Hongqi,Wang, Zhi,Shi, Zhihao,Gong, Xuzhong,Cao, Jianwei,&Wang, Mingyong.(2017).Facile hydrogen production from Al-water reaction promoted by choline hydroxide.ENERGY,131,98-105.
MLA Wang, Hongqi,et al."Facile hydrogen production from Al-water reaction promoted by choline hydroxide".ENERGY 131(2017):98-105.
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