Investigation of operating and geometric conditions of sweeting process of sour methane gas by zinc oxide nano particles

Author(s): Moslem Mohammadian, Parviz Darvishi, Behnam Pourhatami,Mahmud Moradi, Farshad Farahbod

Nano catalysts are adapted in this paper to vanish H S 2 as the toxic, corrosive and pyrophoric contaminant. The important feature which is considered is to improve the adsorption efficiency of hydrogen sulphide from hydrocarbon fuels such as methane gas by applying the zinc oxide as nano catalyst. Totally, the optimumconditions to eliminate the hydrogen sulphide frommethane gas are evaluated in this paper, experimentally. In this paper, zinc oxide nano particles are synthesized and are contacted with flow of sour methane. The synthesized nano particles are characterized by SEM and TEM. The process performance of H S 2 removal from methane gas on zinc oxide nano particles is illustrated by the ratio of outlet concentration per feed concentration. The effects of operating conditions such as operating temperature and pressure, the amount of H S 2 concentration in feed stream, size of nano catalyst and the bed diameter are investigated in this paper. This work studies the adsorption of H S 2 from natural gas with an emphasis on the influence of the operating and geometric parameters on process efficiency. Finally, results introduce the amount of pressure 12 atm, temperature 80 C , bed height 70 cm, diameter of catalytic bed 20 cm (for nanocatalysts with 35nm) and 40 cm (for nanocatalysts with 55nm) and 35 nm in diameter nano zinc oxide as the optimum basic properties. Therefore, the amount of 0 C /C is decreased to 0.024 for 35 nm in diameter zinc oxide and 0.033 for 55 nm in diameter zinc oxide, respectively. In addition, this is confirmed that the increase in the feed concentration of H S 2 , also the decrease in the diameter of zinc oxide catalyst enhances the process efficiency.

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