DOI: https://doi.org/10.9767/bcrec.17.1.12366.32-45

Complex Processing of Adsorbent Used in the Purification of Hydrogen-Containing Gas

1Institute of Material Science of the Uzbekistan Academy of Sciences, Ch. Aytmatov str.2B, Tashkent 100084, Uzbekistan

2Center for Advanced Technologies, University str.7, Tashkent 100174, Uzbekistan

3Bukhara Petroleum Refinery Plant Unitary Enterprise, Karaul-bazar, street mustakillik 1, Bukhara region 200900, Uzbekistan

4 Almalyk Branch of the National Research Technological University "MiSIS", Uzbekistan

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Received: 27 Sep 2021; Revised: 29 Oct 2021; Accepted: 30 Oct 2021; Available online: 9 Nov 2021; Published: 30 Mar 2022.
Editor(s): Istadi Istadi
Open Access Copyright (c) 2021 by Authors, Published by BCREC Group
Creative Commons License This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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Abstract

The problems of processing spent adsorbents with a high concentration of chemisorbed chlorine-containing compounds for their reuse are studied in this article. The genesis of the phase composition and morphology at all technological stages of thermochemical regeneration of the spent adsorbent - Axstrap-860 by means of alkaline modification with a combined solution of sodium and potassium hydroxides has been tested by diffractometry and elemental analysis. The results show that the formation of a layer with an increased concentration of alkali metals in the form of the corresponding carbonates and NaOH on the surface of the granules and in the volume of sodium and potassium aluminates provides adsorption of HCl, which are slightly inferior to the fresh adsorbent. The conditions for the removal of halogen-containing substances from technogenic raw materials with the subsequent isolation of useful products have been optimized: (1) crystalline NaCl intended for the preparation of electrolyte for electrode boilers and steam generators; (2) a mixture of chlorides and hydroxochlorides of aluminum tested in the process of coagulation purification of turbid natural and waste waters; (3) pseudoboehmite for the production of an adsorbent-desiccant and the synthesis of magnesium-aluminum spinel using the technology of destruction-epitaxial transformation, and a promising carrier for catalysts for steam reforming of hydrocarbons. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

 

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Keywords: Adsorbent; Catalyst carrier; Oil refining; Regeneration of catalysts; Hydrogen
Funding: Ministry of innovative development of the Republic of Uzbekistan under contract Grant Number FZ-2019-06066 and MUK-2021-45

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Section: Original Research Articles
Language : EN
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