Hydroxyapatite supported bimetallic cobalt and nickel catalysts for syngas production from dry reforming of methane

被引:129
作者
Thanh Son Phan [1 ]
Sane, Abdoul Razac [1 ]
de Vasconcelos, Bruna Rego [1 ]
Nzihou, Ange [1 ]
Sharrock, Patrick [1 ]
Grouset, Didier [1 ]
Doan Pham Minh [1 ]
机构
[1] Univ Toulouse, Mines Albi, CNRS, Ctr RAPSODEE,UMR 5302, Campus Jarlard, F-81013 Albi 09, France
关键词
Hydroxyapatite; Cobalt; Nickel; Bimetallic catalyst; Dry reforming of methane; PROMOTED NI; THERMODYNAMIC ANALYSIS; HYDROGEN-PRODUCTION; COKE FORMATION; CO2; DEACTIVATION; COKING; NANOCATALYST; CALCINATION; PERFORMANCE;
D O I
10.1016/j.apcatb.2017.10.063
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
Hydroxyapatite (HAP, Ca-10(PO4)(6)(OH)(2)) has all the criteria of a catalyst support, in particular its high thermal stability. However it is still less studied in the heterogeneous catalysis. For the first time, hydroxyapatite supported bimetallic Co-Ni catalysts were prepared and evaluated in the dry reforming of methane (DRM) process. Nanoparticles containing both nickel and cobalt were well formed on the surface of HAP by conventional impregnation methods. No modification of HAP structure was observed after metals deposition. DRM reaction was carried out at 700-750 degrees C and around 1.6 bar, using a fixed-bed reactor which was fed with a mixture of 20%vol CH4, 20%vol CO2 and 60%vol N-2. CH4 and CO2 conversion reached up to 60 and 68% at 700 degrees C, respectively, and 73 and 79% at 750 degrees C, respectively during long reaction times of 50-160 h. Water as a by-product could be quantified along the catalytic reaction indicating the implication of reverse water-gas-shift reaction. TEM-EDX analysis of the used catalysts recovered after catalytic tests showed that coke deposition was limited and there was slight modification of metals particle size. The results obtained were very promising for the design of an efficient catalytic system for DRM process.
引用
收藏
页码:310 / 321
页数:12
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