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.

中文翻译：

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在缺钙羟基磷灰石负载的钴和镍催化剂上干法重整甲烷

摘要 以Ca(NO3)2 和NH4H2PO4（常规合成路线，HAP_N 载体）和CaCO3 和H3PO4（新合成路线，HAP_C 载体）为原料，采用湿法化学沉淀法合成了缺钙羟基磷灰石(HAP) 无孔载体。使用 Co(NO3)2 和 Ni(NO3)2 盐通过初湿浸渍制备单金属和双金属负载型催化剂。钴基和镍基颗粒的大小从几纳米到几十纳米不等。在 700 °C 和 1.6 bar 条件下进行的甲烷干重整 (DRM) 测试表明，HAP 负载的钴催化剂比 HAP 负载的镍催化剂更具系统活性，这是 DRM 中的一项新发现。将 Ca/P 的摩尔比从 1.43 (HAP_N) 增加到 1.60 (HAP_C) 载体导致催化活性略有下降，但催化稳定性提高。因此，