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Dry reforming of methane over calcium-deficient hydroxyapatite supported cobalt and nickel catalysts

Abstract : Calcium-deficient hydroxyapatite (HAP) non-porous supports were synthesized from Ca(NO3)2 and NH4H2PO4 (conventional synthesis route, HAP_N support) and from CaCO3 and H3PO4 (new synthesis route, HAP_C support) by wet chemical precipitation method. Monometallic and bimetallic supported catalysts were prepared by incipient wetness impregnation using Co(NO3)2 and Ni(NO3)2 salts. The size of Co- and Ni-based particles varied from some nm to dozens nm. Dry reforming of methane (DRM) tests at 700 °C, and 1.6 bar shows that HAP-supported cobalt catalysts were systematically more active than HAP-supported nickel catalysts, which is a new finding in DRM. Increasing the molar ratio of Ca/P from 1.43 (HAP_N) to 1.60 (HAP_C) support led to a slight decrease of the catalytic activity but an improvement of the catalytic stability. Thus, HAP_C support synthesized from CaCO3 and H3PO4 is a good candidate for designing an efficient catalyst for the DRM reaction.
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Submitted on : Thursday, September 10, 2020 - 3:17:04 PM
Last modification on : Tuesday, April 19, 2022 - 10:36:01 AM
Long-term archiving on: : Thursday, December 3, 2020 - 2:05:34 AM

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Thi Quynh Tran, Doan Pham Minh, Thanh Son Phan, Quoc Nghi Pham, Hoan Nguyen Xuan. Dry reforming of methane over calcium-deficient hydroxyapatite supported cobalt and nickel catalysts. Chemical Engineering Science, Elsevier, 2020, 228, pp.1-14/115975. ⟨10.1016/j.ces.2020.115975⟩. ⟨hal-02904693⟩

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