Abstract The atmospheric pressure low temperature steam reforming of ethanol over Bi4(V0.90Co0.10)2O11-δ (BICOVOX) catalysts, synthesize by a solution combustion synthesis method and calcined at 400, 600 and 800 °C, has been investigated at different reactor temperatures, H2O: EtOH molar ratios and feed flow rates. For fresh catalysts amount, crystallinity and particle size of pure γ-BICOVOX phase is observed to increase with increasing calcination temperature. Phase purity and crystallinity of the catalysts are almost retained till 30 h of activity study with some amount of carbon formation as derived from XRD, XPS, FESEM and simultaneous DTA-TGA study. Catalyst calcined at 600 °C (BICOVOX-600) exhibits the highest ethanol conversion (100%) with maximum H2 selectivity (80%) under reaction conditions of 400 °C, 23:1H2O: EtOH molar ratio and 0.35 cc min−1 feed flow rate. The maximum O2− vacancy present in lattice and lowest coke deposition could explain the best performance of BICOVOX-600 catalyst.

中文翻译：

---

钴掺杂钒酸铋[Bi4(V0.90Co0.10)2O11-δ(BICOVOX)]催化剂上乙醇的低温蒸汽重整制氢

摘要 研究了采用溶液燃烧合成法合成并在 400、600 和 800 °C 下煅烧的 Bi4(V0.90Co0.10)2O11-δ (BICOVOX) 催化剂常压低温蒸汽重整乙醇。反应器温度、H2O: EtOH 摩尔比和进料流速。对于新鲜催化剂，观察到纯 γ-BICOVOX 相的结晶度和粒度随着煅烧温度的增加而增加。从 XRD、XPS、FESEM 和同步 DTA-TGA 研究得出，催化剂的相纯度和结晶度几乎保持到 30 小时的活性研究中，并有一定量的碳形成。在 600 °C 煅烧的催化剂 (BICOVOX-600) 在 400 °C、23:1H2O: EtOH 摩尔比和 0. 35 cc min-1 进料流速。晶格中存在的最大 O2- 空位和最低的焦炭沉积可以解释 BICOVOX-600 催化剂的最佳性能。