Study of methods of chemisorption purification of hydrogen sulfide in natural gases with natural sorbent

¹ Samarkand State University, Samarkand, Uzbekistan
² Samarkand Medical Institute, Samarkand, Uzbekistan

^* Corresponding author: fayzullayev72@inbox.ru

Abstract

We know from the literature that the cost-effectiveness of using zeolites to purify natural gas is much higher than other natural resources. In the laboratory, CaCl₂∙ZnCl₂∙MnCl₂/HQZ were prepared by treating bentonite obtained from local raw materials with calcium, zinc, and magnesium salts. Local raw materials are activated by mechanical-thermal and chemical processing and are delivered in the form of dark-colored granules (tablets) up to 5 mm in diameter.

The sorption potential of high-silica zeolite obtained from local raw materials by metal salts and heat treatment was studied, and a technological scheme was developed. A catalyst containing CaCl₂∙ZnCl₂∙MnCl₂/HQZ was developed for drying the obtained high-silica zeolite oil satellite and natural gas from water vapor and purification from sulfur compounds, and its texture and sorption properties were studied. The total amount of SiO₂, Ca²⁺, Zn^2+, and Mg²⁺ ion phases was studied in the radiological analysis of the surface of the catalyst CaCl₂∙ZnCl₂∙MnCl₂/HQZ. According to IR spectroscopy data, surface adsorption of hydrogen sulfide at 25°C occurs in the presence of hydroxyl groups. UZBEKGAZ JSC -Mubarek Gas Processing Plant conducted experimental tests to study the sorption properties of this catalyst, as well as a comparative study of the possibility of sorption of sulfides with the participation of catalysts CaCl₂∙ZnCl₂∙MnCl₂/HQZ and CaA (5A). The tests showed that another experimental test of the selected CaA (5A) compound catalyst was also performed. The absorption of this adsorbent hydrogen sulfide showed that the catalyst CaCl₂∙ZnCl₂∙MnCl₂/HQZ has a total capacity of 8.3% by mass and 14.3% by mass.