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IJSTR >> Volume 9 - Issue 8, August 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



H2S Dissociation In Natural Gasbecomes H2 And S8 By Zeolite And Caocomposite Synthesis Catalyst

[Full Text]

 

AUTHOR(S)

Rifqi Sufra, Muhammad Djoni Bustan, Sri Hartati

 

KEYWORDS

Adsorbent, H2S, ZnO, Zeolite, CaO, Dissociation.

 

ABSTRACT

The petrochemical industry is predicted for the next few years to still use raw materials from fossil fuels such as natural gas. The natural gas used still contains H2S which is corrosive and has the risk of poisoning the catalyst so that the presence of H2S is avoided before it damages or degrades the performance of the catalyst as used in the steam reforming or steam converting process. Several studies aimed at recovering hydrogen and sulfur. One such effort is through a thermal dissociation process. To dissociate H2S into hydrogen gas and S2 gas, an operating temperature of 1300oC is required. This method is less economical to apply to industry because it requires large amounts of energy and does not produce solid sulfur [9]. As a result researchers used catalysts to reduce energy consumption and also sought to convert into solid sulfur. From several studies by Nguyen et al, 2015 [8], zeolite modification with metal has the potential to increase H2S absorption in room temperature. It is hoped that the invention can be considered as an alternative ZnO catalyst. Therefore, in this study an attempt was made to make a catalyst made from natural zeolite combined with a metal compound, CaO. The catalyst preparation process is carried out by the impregnation method, in which there are 3 variations of the catalyst based on CaO : Natural Zeolite ratio that is, 1 : 5, 1 : 7.5, and 1 : 10. These three types of catalyst have been tested using SEM and XRD, where the results show success in the impregnation process. Furthermore, in this study a trial was carried out on the use of catalysts to absorb the gas that became the raw material. The mass of the catalyst in each variation of the composition used is also varied in mass, namely 40 gr, 50 gr, 60 gr, 70 gr, and 80 gr. In the process, variations in the feed flow rate of the catalyst are varied, namely 5, 10, 30, 50, and 80 Liters / minute. Therefore, it is known that the composition of CaO and Zeolite 1: 5 is the best composition and produces the highest conversion. The lower the flow rate and the higher the value of the catalyst mass, the better dissociation of H2S.

 

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