中华医学超声杂志

应用化学 ›› 1988, Vol. 0 ›› Issue (5): 39-43.

• 研究论文 • 上一篇    下一篇

板状镍催化剂上氨分解和氨部分氧化制氮氢气的研究

邱发礼, 吕绍洁   

  1. 中国科学院成都有机化学研究所
  • 收稿日期:1987-04-03 修回日期:1987-07-27 出版日期:1988-10-10 发布日期:1988-10-10
  • 基金资助:
    国家自然科学基金

STUDY ON THE DECOMPOSITION AND PARTIAL OXIDATION OF AMMONIA ON POROUS Ni/Al2O3 CATALYST PLATE

Qiu Fali, L? Shoujie   

  1. Chengdu Institute of Organic Chemistry, Academia Sinica
  • Received:1987-04-03 Revised:1987-07-27 Published:1988-10-10 Online:1988-10-10

PDF

441

被引次数

3

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153.0kJ/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.

关键词: 氨分解, 氨部分氧化, 镍催化剂, 动力学

Abstract: A porous Ni/Al2O3 catalyst plate was prepared.It gives NH3 conversion more than 99.5% at 750℃ and space velocity of NH3 10000-40000h-1.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 conditions 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.

Key words: NH3-Decomposition, of ammonia, NH3-Partial, Oxidation of ammonia Ni catalyst, Kinetics

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