Abstract: The tar carbonization was studied in the temperature range of 350−500 °C. Gaseous products formed during the tar carbonization at 450 °C were analyzed for the concentration of sulfur-containing compounds. H2S and COS were observed in the reaction products. An increase of the carbonization temperature from 450 to 550 °C led to the decrease of the coke yield due to deeper cracking of the tar components. The temperature increases also resulted in the decrease of the sulfur concentration in the coke from 1.28 % to 1.18 %. The efficiency of the carbonization process and the properties of the obtained coke were further improved by placing three different catalysts Ni-Mo/Sibunit, Cu/Sibunit and Ni/Sibunit in different zones of the autoclave where the tar carbonization was performed. In zone 1 the tar was subjected to hydrocracking and desulfurization over the 8%Ni-2,5%Mo/Sibunit catalyst. In zone 2 sulfur was trapped by the Cu/Sibunit catalyst in the form of copper sulfide. In zone 3 coke was formed over the Ni/Sibunit catalyst predominantly from gases formed by the tar cracking. Such organization of the carbonization process increased the coke yield to 45 wt.%. The three-zone catalyst arrangement during the tar carbonization also resulted in a substantial decrease of the sulfur concentration in gaseous products, which led to lower sulfur concentration in the solid reaction products in zone 3.

Cite: Chesnokov V.V. , Chichkan A.S.
Effect of Catalysts on Tar Carbonization
Catalysis Today. 2021. V.379. P.28-35. DOI: 10.1016/j.cattod.2020.08.002 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Nov 1, 2019
Accepted:	Aug 20, 2020
Published online:	Aug 27, 2020
Published print:	Nov 1, 2021

Identifiers:

Web of science:	WOS:000686897100005
Scopus:	2-s2.0-85090126149
Elibrary:	45320487
Chemical Abstracts:	2020:1779393
OpenAlex:	W3082132758

Citing:

DB	Citing
Scopus	4
Elibrary	4
Web of science	4
OpenAlex	4

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