浸渍活性炭脱除H2S的反应动力学

提出了浸渍活性炭脱除Ｈ２Ｓ的反应过程机理模型，认为脱硫过程主要是Ｈ２Ｓ在活性炭的吸附水膜内离解后被活化的Ｏ２分子以及活性氧原子氧化生成单质硫逐渐沉积在活性炭表面，同时应用最小二乘法回归实验数据得到了脱硫动力学方程ｄＷｓ／ｄｔ＝ｋ１ｋ２／ａｐｏ２／ｐＨ２Ｓ／１＋ｋ２ｐｏ２×（１－αＷｓ）＾２其中动力学参数ｋ１＝３．７５３×１０＾５ｅｘｐ「－３００６．５／Ｔｒ」ｋ２／０．２６３ｅｘｐ「１９４５．６／Ｔ

KINETICS OF REMOVING H_2S BY IMPREGNATED ACTIVATED CARBON

A kinetics model of removing hydrogen sulfide by impregnated activated carbon has been put forward ,which is described as follows: First, a water film is formed on the surface of the activated carbon. In this film the reactants H_2S and O _2 are dissolved. And then, the oxygen molecules are adsorbed on the carbon surface and polarized, and the H_2S molecules are dissociated into protons and hydro-sulphide ions. The latter react with the polarized oxygen molecules to form hydroxyl ions and sulfur. At the same time, the O-O bond is broken to form oxygen radicals which also react with hydro-sulphide ions. The product sulfur is deposited on the activated carbon. With least square method, the desulfurizig kinetics expression has been developed as follows:where This model is in excellent agreement with the experimental results, and the average rela tive errors are between 1. 36%and 6. 18%.