DOI: 10.1016/j.jcou.2019.02.008
Scopus记录号: 2-s2.0-85062172842
论文题名: Enhanced hydrogen production with carbon storage by olivine alteration in CO 2 -rich hydrothermal environments
作者: Wang J. ; Watanabe N. ; Okamoto A. ; Nakamura K. ; Komai T.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 30 起始页码: 205
结束页码: 213
语种: 英语
英文关键词: CO 2 reduction
; CO 2 -rich
; H 2 production
; Hydrothermal
; Olivine alteration
Scopus关键词: Carbon dioxide
; Formic acid
; Hydrogen production
; Hydrogen storage
; Magnesite
; Olivine
; Reaction rates
; Silicate minerals
; Sodium bicarbonate
; Carbonation process
; CO2 reduction
; CO2-rich
; Enhanced hydrogen productions
; H2production
; Hydrothermal
; Hydrothermal environment
; Reaction conditions
; Iron compounds
英文摘要: Here we report a novel experimental study on simultaneous hydrogen (H 2 ) production and CO 2 storage. A high concentration of NaHCO 3 (source of CO 2 ) is utilized to promote H 2 generation from olivine (Mg,Fe) 2 SiO 4 ) hydration, and then CO 2 is reduced to formic acid (HCOOH) or sequestrated in magnesite (MgCO 3 ) in a hydrothermal system. The effects of NaHCO 3 concentration (0-1.0 mol/L) and initial pH (8-11) on H 2 production and CO 2 storage were experimentally lab-scale tested at 300 °C. Both reaction pathways and reaction rates changed with variation of the reaction conditions. Under CO 2 -rich conditions, olivine consumption was promoted with the absence of Fe(II)-bearing brucite (Mg,Fe(OH) 2 ), by which more Mg and Fe ions were released. Thus, the production of H 2 and carbonation processes were significantly accelerated. The highest H 2 generation rate reached 3.13 mmol/kg olivine ·h, which is more than 15 times higher than previously reported. The HCOOH yield was 129.1 mmol/kg olivine and magnesite ((Mg,Fe)CO 3 ) generation reached a maximum of 19.2 wt% in 72 h. The enhancement of H 2 production at lower pH is primarily attributed to the presence of HCO 3 - , rather than the pH changes caused by NaHCO 3 addition. The system proposed here has significant potential to be applied at the field-scale. © 2019 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117289
Appears in Collections: 气候变化与战略
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Recommended Citation:
Wang J.,Watanabe N.,Okamoto A.,et al. Enhanced hydrogen production with carbon storage by olivine alteration in CO 2 -rich hydrothermal environments[J]. Journal of CO2 Utilization,2019-01-01,30