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研制了一种 Ni/Al_2O_3多孔板状催化剂.该催化剂在反应温度高于750℃,氨分解率高于99.5%时,允许反应空速达10000—40000h~(-1).用该催化板组装的反应器可采用内加热形式,和一般的外加热反应器相比可节约能耗约30%.在催化板上氨分解的经验动力学方程是γ=kp~2NH_3,表观活化能为153.OkJ/mol.将该催化剂用于氨部分氧化时,在空气和氨比为1.0—1.7,680—750℃,氨空速10000—40000h~(-1)条件下,在氨点火后无外加能源情况下,能制得含氢30～43%,残氧小于0.1%的氮氢混合气,氨的转化率>99.5%,连续250小时反应表明,催化剂活性稳定.宏观动力学研究得出,反应对氨呈零级,表观活化能为37.2kJ/mol.
A porous Ni / Al_2O_3 catalyst was prepared, which allowed the reaction space velocity to reach 10000-40000h ~ (-1) when the reaction temperature was above 750 ℃ and the ammonia decomposition rate was above 99.5% The reactor can be used in the form of internal heating, which can save about 30% energy consumption compared with the general external heating reactor. The empirical kinetic equation of ammonia decomposition on the catalyst plate is γ = kp ~ 2NH_3, and the apparent activation energy is 153. OkJ / mol. The catalyst for ammonia partial oxidation, the air and ammonia ratio of 1.0-1.7,680-750 ℃, ammonia space velocity of 10000-40000h ~ (-1) conditions, after the ignition of ammonia without additional energy In the case, 30 to 43% of hydrogen can be obtained, the residual oxygen is less than 0.1% of the mixture of nitrogen and hydrogen, ammonia conversion rate of> 99.5% for 250 hours reaction showed that the catalyst activity stable macroscopical kinetic studies have shown that the reaction The ammonia is zero order, the apparent activation energy of 37.2kJ / mol.