Co-Ni/Al2O3catalyst was prepared by the fusion method and used in Fischer-Tropsch synthesis(FTS).The catalysts were characterized by means of nitrogen sorption and scanning electron microscopy.The effect of some react...Co-Ni/Al2O3catalyst was prepared by the fusion method and used in Fischer-Tropsch synthesis(FTS).The catalysts were characterized by means of nitrogen sorption and scanning electron microscopy.The effect of some reaction conditions such as temperature,pressure and H2/CO feed ratio on the catalytic performance of Co-Ni/Al2O3in CO hydrogenation was investigated in a fixed-bed reactor.The results indicate that the optimum reaction conditions are 250℃,0.3 MPa,H2/CO feed ratio of 2.0,and GHSV of 3 000 h-1.Kinetically,the reaction rate was correlated with the Langmuir-Hinshelwood-Hougen-Watson type models.The activation energy for the best fitted model is 88.41 kJ/mol,suggesting that the intra-particle mass transport is not significant.展开更多
以失效加氢裂解催化剂为原料,利用液-固反应的核收缩模型研究硫酸-氯化钠-过氧化氢浸钯的浸出动力学,考察了液固比、搅拌转速、浸出温度、硫酸浓度、氯离子浓度对钯浸出反应速率的影响。结果表明,液固比及转速对浸出速率影响不大,废催...以失效加氢裂解催化剂为原料,利用液-固反应的核收缩模型研究硫酸-氯化钠-过氧化氢浸钯的浸出动力学,考察了液固比、搅拌转速、浸出温度、硫酸浓度、氯离子浓度对钯浸出反应速率的影响。结果表明,液固比及转速对浸出速率影响不大,废催化剂中钯的浸出主要受化学反应控制;提高反应温度、硫酸浓度、氯离子浓度均可提高钯的浸出率,并增大钯的浸出速率;采用阿伦尼乌斯公式求出反应活化能为44.8 k J·mol^(-1),3个动力学参数的拟合曲线的相关系数均在0.99以上,氢离子、氯离子反应级数分别为0.89、0.67。相关动力学研究结果可为类似物料的处理提供借鉴。展开更多
文摘Co-Ni/Al2O3catalyst was prepared by the fusion method and used in Fischer-Tropsch synthesis(FTS).The catalysts were characterized by means of nitrogen sorption and scanning electron microscopy.The effect of some reaction conditions such as temperature,pressure and H2/CO feed ratio on the catalytic performance of Co-Ni/Al2O3in CO hydrogenation was investigated in a fixed-bed reactor.The results indicate that the optimum reaction conditions are 250℃,0.3 MPa,H2/CO feed ratio of 2.0,and GHSV of 3 000 h-1.Kinetically,the reaction rate was correlated with the Langmuir-Hinshelwood-Hougen-Watson type models.The activation energy for the best fitted model is 88.41 kJ/mol,suggesting that the intra-particle mass transport is not significant.
文摘以失效加氢裂解催化剂为原料,利用液-固反应的核收缩模型研究硫酸-氯化钠-过氧化氢浸钯的浸出动力学,考察了液固比、搅拌转速、浸出温度、硫酸浓度、氯离子浓度对钯浸出反应速率的影响。结果表明,液固比及转速对浸出速率影响不大,废催化剂中钯的浸出主要受化学反应控制;提高反应温度、硫酸浓度、氯离子浓度均可提高钯的浸出率,并增大钯的浸出速率;采用阿伦尼乌斯公式求出反应活化能为44.8 k J·mol^(-1),3个动力学参数的拟合曲线的相关系数均在0.99以上,氢离子、氯离子反应级数分别为0.89、0.67。相关动力学研究结果可为类似物料的处理提供借鉴。
