Synergistic promotions between high purity H2 production and CO2 capture via sorption enhanced chemical looping reforming

被引:14
作者
Liu, Mingkai [1 ]
Li, Yang [1 ,2 ]
Wang, Xuyun [1 ,3 ]
Gai, Zhongrui [1 ,4 ,5 ]
Rao, Qiong [1 ,2 ]
Yang, Tianlong [1 ,4 ,5 ]
Zhang, Jinrui [1 ,2 ]
Tang, Sanli [1 ]
Pan, Ying [1 ]
Jin, Hongguang [1 ]
机构
[1] Chinese Acad Sci, Inst Engn Thermophys, 11 Beisihuanxi Rd, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[3] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230027, Peoples R China
[4] Xi An Jiao Tong Univ, Int Res Ctr Renewable Energy, Xian 710049, Peoples R China
[5] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China
基金
中国国家自然科学基金;
关键词
Isothermal sorption-enhanced chemical looping reforming; High-purity hydrogen production; In-situCO2; capture; Double metal oxide particles; K-Li4SiO4; particles; HYDROGEN-PRODUCTION; OXYGEN CARRIERS; METAL-OXIDE; COMBUSTION; PERFORMANCE; IRON; DEPOSITION; GLYCEROL; REACTOR; CAO;
D O I
10.1016/j.fuproc.2024.108042
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Hydrogen energy, a promising clean source, holds potential to combat global warming. To achieve efficient and low-carbon H-2 production, we proposed an isothermal sorption-enhanced chemical looping reforming (SE-CLR) process to realize the high-purity hydrogen production and in-situ CO2 capture at mild temperatures (550-650 degrees C). For practical application, the process is characterized to use Fe-Ni double metal oxide particles as steam methane reforming oxygen carriers, and K2CO3-promoted Li4SiO4 particles as CO2 sorbent. The oxygen transfer capacity of metal oxide matintained high at 57.4%, and the K-Li4SiO4 absorbents remained at 22.5% CO2 absorption capacity over 200 isothermal absorption-regeneration cycles. Conducting a synergistic conversion mechanism within double metal oxides and absorbents, and adjusting the absorbent-to-metal oxide mass ratio to 7:4, enhanced hydrogen purity to 92% and CO2 uptake to 95%. Furthermore, in-situ CO2 removal in CLR processes achieved methane conversion and H-2 production rates equivalent to conventional CLR processes under the same reaction conditions, but at temperatures similar to 60 degrees C lower. The effects of the reaction temperature, pressure, steam-to-methane and methane-to-solid ratios on SE-CLR performance were studied systematically. Finally, stable hydrogen production with a purity of 91%-89% and CO2 uptake of 94%-91% were obtained over 25 CLR cycles, with minimal changes in mechanical strength of particles.
引用
收藏
页数:11
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