Double adjustment of Co and Sr in LaMnO3+δ perovskite oxygen carriers for chemical looping steam methane reforming

被引：62
作者：
Yin, Xianglei [1 ,2 ]
Shen, Laihong [1 ]
Wang, Shen [1 ]
Wang, Baoyi [1 ]
Shen, Cheng [1 ]
机构：
[1] Southeast Univ, Sch Energy & Environm, Key Lab Energy Thermal Convers & Control, Minist Educ, Nanjing 210096, Jiangsu, Peoples R China
[2] Zaozhuang Univ, Sch Mech & Elect Engn, Zaozhuang 277160, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2022年 / 301卷
基金：
中国国家自然科学基金;
关键词：
Chemical looping methane reforming (CLMR); Syngas; Cobalt; Strontium; LaMnO3+delta; PARTIAL OXIDATION; OXIDES; FE; CATALYST; SYNGAS; COMBUSTION; REACTIVITY; DEPOSITION; SUPPORTS; CEO2;
D O I：
10.1016/j.apcatb.2021.120816
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：
As a key factor for chemical looping steam methane reforming, the oxygen carrier with high quality is essential. In this work, both high reactivity and coking resistance of the La1-xSrxMn1-yCoyO3+delta oxygen carriers are achieved by double adjustment of Co and Sr. The redox tests and characterization results showed that the introduction of cobalt provided surface active sites to accelerate the activation of methane on the surface, and the Sr doping increased the oxygen vacancies which facilitated the migration of oxygen anion in the bulk of the oxygen carrier particles. The doping of Co and Sr can match the supply of oxygen from the bulk and the need of oxygen on the surface of the oxygen carrier particles. The best substitution proportion of Co and Sr could be set in range of 0.4-0.5 and 0.2-0.4, respectively. The La0.8Sr0.2Mn0.5Co0.5O3+delta exhibited satisfactory performance and good stability in the cyclic redox tests.
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页数：16
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