SELECTION OF ADSORBENTS WITH HIGH EFFICIENCY IN DRYING GASES AND STUDY OF THEIR PHYSICO-CHEMICAL PROPERTIES

Аннотация

Currently, it is considered important to select adsorbents with high efficiency in drying gases. For this purpose, the following works are being carried out: physical and chemical parameters of NaA (3Å) synthetic zeolite, physical and chemical properties of 3 types of KA (3Å) zeolite were reviewed. and other information is given in the article. KAYS WORD: Absorption drying, adsorption drying, condensation, membrane method, synthetic zeolite, corrosion resistance. АННОТАЦИЯ: В настоящее время считается важным подбор адсорбентов с высокой эффективностью осушки газов. С этой целью проводятся следующие работы: рассмотрены физико-химические параметры синтетического цеолита NaA (3Å), физико-химические свойства 3-х типов цеолита KA (3Å). и другая информация приведена в статье. KAYS WORD: Абсорбционная сушка, адсорбционная сушка, конденсация, мембранный метод, синтетический цеолит, коррозионная стойкость. Water vapor in gas can be separated by physical methods (adsorption, absorption, membrane, condensation) and chemical methods (using CaCl ) and their 2 hybrid combination methods. Today, oil and gas processing industries use the following traditional and modern gas drying methods [1]: • Absorption drying; • Adsorption drying; 36 Acumen: International Journal of Multidisciplinary Research Acumen: International Journal of Multidisciplinary Research Volume 1, Issue 1 • Condensation. Spray cooling of hydrate inhibitors; • Membrane method. Using elastomers and glassy polymers. • Chemical method. Using hygroscopic salts. Metal chlorides are usually used. Absorption and adsorption methods are widely used in the world. Absorption drying of gases (Glycolic drying) Drying gases using glycols is one of the most common methods, allowing gases to be dried sufficiently for transmission or use as fuel. Basic requirements for industrial consumers In the absorption process, ethylene glycol, diethylene glycol and triethylene glycol are mainly used as absorbers. In desorption cycle drying processes and repeated application of the absorbent, almost no absorbent is consumed. Therefore, any substance capable of separating the absorbent from the extracted component can be used as an absorbent. However, in order to choose an absorber in the industry, a number of the following requirements should be taken into account [2-3]: • The absorbent must have a high absorption capacity relative to the component to be extracted from the gas. The use of an absorbent with a low absorption capacity leads to an increase in circulation of the circulating solution and an increase in the cost of desorption. • Absorbent should be easily regenerated during desorption. For this, the component pressure in the absorbing solution must be high at the desorption temperature. • The selectivity of the absorbing solution should be high, that is, it should absorb the desired component well and not absorb other substances in the gas. • The absorption and desorption temperatures of the absorber should not have high vapor pressure. Otherwise, the quantitative loss of this absorbent may increase. • Absorbent should be chemically stable in working conditions, should not change its age and structure. Chemical reactions should not occur between the gas and the absorbent. • The absorber must be cheap and have a large resource. • The absorbent should not have a corrosive effect on the equipment of the absorption process. • The mass transfer coefficient must be sufficiently high. It served as a basis for choosing effective adsorbents for natural gas drying. In our study, various adsorbents were selected in order to improve the gas purification process at Shurtanneftgaz LLC. 37 Acumen: International Journal of Multidisciplinary Research Acumen: International Journal of Multidisciplinary Research Volume 1, Issue 1 Today, NaA synthetic zeolite with a pore size of 3 Å is used for natural gas drying at Shurtanneftgaz LLC (Fig. 1). Physico-chemical parameters of this adsorbent are presented in table 1. 1 – table Physico-chemical parameters of NaA (3Å) synthetic zeolite Demand for № Indicator name Analysis results TSh 1 Granular appearance Cylindrical Cylindrical 2 Adsorbent size, mm 2,8±3, 2,8 Cumulative density, g/cm3, 3 calculated relative to absolute dry 0.65 is not less 0,94 matter Not less than 4 Amount of zeolite phase crystals, % 81,5 80.0 Not less than 5 Moisture absorption capacity, mg/g 205,0 160.0 Not less than 6 Anti-aging strength, % 92,0 92.0 Not less than 7 Mass fraction of water resistance, % 96,0 96.0 The composition of NaA zeolite is determined to be Na O*Al O *SiO . 2 2 3 2 Zeolites of this type are widely used in gas drying, deep cleaning of liquids and gases. The main disadvantage of this type of zeolites is their water resistance and resistance to high pressures compared to new generation zeolites. 1 – picture. Overview of NaA (3Å) synthetic zeolite Taking into account the above, we have selected new generation adsorbents for gas drying processes. 38 Acumen: In