DAI XIoaping, YU Changchun
(The Key Laboratory of Catalysis, China National Petroleum Corporation, China University of Petroleum, Beijing 102249, China)
Abstract: Chemical Looping Reforming (CLR) is a new technology that can be used for syngas production (CO+H2), which demands less energy than normal endothermic steam methane reforming (SMR) processes. CLR for syngas production avoids separation problems since the gasses are taken out separately from fuel reactor and air reactor. One key issue with the CLR concept that is being widely studied is the oxidation-reduction performance of potential oxygen-carrier materials. Two compound oxides (La-Cr-O and La-Ni-O) were prepared by sol-gel method, and characterized by XRD, BET, FT-IR, H2-TPR and CH4-TPSR. The catalytic performance of the prepared samples for CLR of CH4 to syngas was investigated. The results indicated that LaNiO3 should provide the oxygen species for the total oxidation and partial oxidation with CH4, whereas cracking reaction of CH4 to H2 is favourable on LaCrO3 oxide. Among them, LaNiO3 oxide has higher oxygen amount and continuous oxygen supply for CLR for CH4 to syngas with H2/CO=1.45 in continuous flow reaction. The CH4 conversion and CO selectivity are 23.4% and 86.9%.
Key words: methane; chemical-looping reforming (CLR); La-B-O compound oxides; oxygen carrier; synthesis gas
E-mail: daixp@cup.edu.cn
Journal of Molecular Catalysis, Vol. 26, Issue 5, 2012, 423-429
