Catalytic steam reforming of long-chain hydrocarbons has drawn great attention for hydrogen production, which can be used for on-board/on-site fuel cell. In this study, various ceria (or Pr-doped ceria) supported Ni catalysts have been prepared by two different methods (impregnation method and sol-gel method), which are denoted as 10Ni/Ce_1-xPr_xO₂ and 10Ni-Ce_1-xPr_xO₂ (x = 0 or 0.2) respectively. Steam reforming of n-dodecane has been carried out to evaluate catalytic performance of the obtained catalysts at high LHSV (15 ml/g_cat h), low temperature (600 °C) and low mole ratio of water-to-carbon (2) in a fixed-bed tubular reactor. Results show that both the formation of nickel-ceria strong metal support interaction and Pr doping increase its catalytic performance. 10Ni-Ce_0.8Pr_0.2O₂ prepared by sol-gel method exhibits the highest activity (100% conversion of n-dodecane) and stability of hydrogen production (5917.1 μmol/min) together with lowest coke deposition (0.0251 g/g_cat h). Various techniques including XRD, nitrogen adsorption-desorption, H₂-TPR, TEM/STEM, SEM-EDS, XPS, TG/DTG and Raman spectra have been employed to characterize the fresh and spent catalysts. The evaluated activity and stability of ceria supported Ni catalyst is ascribed to the strong interaction between metal and support. In addition, the oxidation of deposited coke on metal is enhanced by the doping of Pr due to its high oxygen storage-release capability.

长链碳氢化合物的催化蒸汽重整已引起制氢的广泛关注，可用于车载/现场燃料电池。在这项研究中，通过两种不同的方法（浸渍法和溶胶-凝胶法）制备了各种二氧化铈（或掺Pr的二氧化铈）负载的Ni催化剂，分别表示为10Ni / Ce _1-x Pr _x O ₂和10Ni-。 Ce _1-x Pr _x O ₂（x = 0或0.2）。已经进行了正十二烷的蒸汽重整，以评估所得催化剂在高LHSV（15 ml / g _cat）下的催化性能。 h），低温（600°C）和固定床管式反应器中水与碳的摩尔比低（2）。结果表明，镍-二氧化铈强金属载体相互作用的形成和Pr掺杂均增加了其催化性能。溶胶-凝胶法制备的10Ni-Ce _0.8 Pr _0.2 O ₂具有最高的活性（正十二烷的100％转化率）和产氢的稳定性（5917.1μmol/ min），焦炭沉积最低（0.0251 g / g _cat  h ）。XRD，氮吸附脱附，H _2等各种技术-TPR，TEM / STEM，SEM-EDS，XPS，TG / DTG和拉曼光谱已用于表征新鲜和用过的催化剂。二氧化铈负载的镍催化剂的活性和稳定性的评估归因于金属和载体之间的强相互作用。另外，由于Pr的高储氧释放能力，通过Pr的掺杂增强了沉积在金属上的焦炭的氧化。