引用本文:
邱发礼, 吕绍洁. 板状镍催化剂上氨分解和氨部分氧化制氮氢气的研究[J]. 应用化学,
1988, 5(5): 39-43.
Citation: Qiu Fali, Lü Shoujie. STUDY ON THE DECOMPOSITION AND PARTIAL OXIDATION OF AMMONIA ON POROUS Ni/Al2O3 CATALYST PLATE[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 39-43.
Citation: Qiu Fali, Lü Shoujie. STUDY ON THE DECOMPOSITION AND PARTIAL OXIDATION OF AMMONIA ON POROUS Ni/Al2O3 CATALYST PLATE[J]. Chinese Journal of Applied Chemistry, 1988, 5(5): 39-43.
板状镍催化剂上氨分解和氨部分氧化制氮氢气的研究
摘要:
研制了一种Ni/Al2O3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=kp2NH3,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.
English
STUDY ON THE DECOMPOSITION AND PARTIAL OXIDATION OF AMMONIA ON POROUS Ni/Al2O3 CATALYST PLATE
Abstract:
A porous Ni/Al2O3 catalyst plate was prepared.It gives NH3 conversion more than 99.5% at 750℃ and space velocity of NH3 10000-40000h1-.An internal heating type was adopted Which saves 30% energy in comparison with the external heating type.The results of reaction kinetics showed that the rate equation of ammonia decomposition on the catalyst plate is γ=kP2NH3 and the apparent activation energy is 153.0kJ/mol. The partial oxidation of ammonia on the catalyst plate was also investigated at the con-ditions of 680-750℃,air/NH3=1.7-1.0 and space velocity 10000-40000h-1.The results showed that a gas mixture containing 30-43% of H2 and less 0.1% of O2 was obtained without external heating after NH3 combustion.A duration test for 250h indicated that NH3 conversion was over 99.5%.The reaction kinetics showed that the rate equation of partial oxidation of ammonia was of zero order and the apparent activation energy obtained was 37.2kJ/mol.
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Key words:
- NH3-Decomposition of ammonia
- / NH3-Partial
- / Oxidation of ammonia
- / Ni catalyst
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