Study On The Optimum Technology Of Tannic Extract Desulfurization

During the process that the gas is produced, more or less 30-40% of all the sulfur in the raw coal is tranformed into the gas in the form of H2S and CS2. As a nocuous gas , H2S must be cleand through the desulfurization process.As an effective way to clean city gas, tannic extract has been widely used and received prominent effect. For example, tannic extract has been proved effective in Shenzhou company of Coal and Electricity in ShanXi province. However, the process of desulfurization has not been studied and explained efficiently for tannic is a catalyst from plant with complex structure. In order to explain the problem, a set of mini-experimental equipment was simulated and set up in the lab. Hence the enginnering operation condition of tannic extract desulfurization was studied.In the study of the process of tannic extract desulfurization. Alkabinity, tannic concentration, vanadium concer ration and temperature were studied and the common rule of each factor influence on desulfurization efficiency and appropriate operation condition were acquired. As the primary factor, alkabinity shouldcondition were acquired. As the primary factor, alkabinity should be below 12g/L; the desulfurization effect is optimum when the ratio of tannic and sodiumm metavanadate was 1.5-2; the high absorption temperature is unfavour for desulfurzation 30~40癈 was proved to be effective through experiments.Under the condition optimizational design of tannic desulfurization was carried out in order to obtain the optimum operation condition of tannic extract desulfurization: alkabinity is 10g/L, tannic concentration is 0.6g/L, vanadium concentration is 0.4g/L, the normal temperature, H2S velocity is 50mL/min. The influence factors: alkabinity>tannic concentration>vanadium concentration>H2S velocity>temperature. In addition, the character of tannic was analysed, and the solvation of industrial tannic was proved very good from IR, a lot of hydroxy and some ethnol and phenol existed in industrial tannic.The results of experimentts showed tannic is an effective way to clean city gas which not only can solve pipelines errosion but also be transformed to nocuous H2S into useful sulfur. The dc ible goal was obtained through tannic extract desulfurization.