Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material

Asaftei, Iuliean V.; Sandu, Ion; Bilba, Nicolae; Lungu, Neculai Catalin; Ignat, Maria; Mahu, Elvira

Iuliean V. Asaftei, Ion Sandu, Nicolae Bilba, Neculai Catalin Lungu, Maria Ignat, Elvira Mahu

Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material

Abstract:

The conversion of light hydrocarbons resulted as by-product of petroleum refining (mixtures of (n + i) butanes, 52.28 - 63.20 vol.%, (1-, cis-, trans-, 2-) butenes, 28.64 - 36.43 vol.% and propane - propylene, 4.79 - 14.64 vol.%) over bifunctional 5% ZnO/HZSM-5 co-catalyst in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450°C, 4 atm. total pressure and at a space velocity (WHSV) of 1 h-1 have been investigated. The results indicate that the selectivity to light aromatics - benzene, toluene and xylenes (BTX) - and to both the gaseous C1, C2 - C4 hydrocarbons and liquid (i + n) C5 - C10 aliphatic hydrocarbons depends on the time on stream of the process. This is a result of coke deposition (polyunsaturated compounds) and catalyst deactivation. The aromatics BTX represent 59-60 wt% in the liquid product during the first 24-36 hours time-on-stream and only 20-30 wt% after 40 hours of reaction when the aliphatic hydrocarbon C5 - C10 (mostly iso) and ]C10 (denoted “oligo”) reach to 70 - 80 wt%. The aromatic products were principally toluene, xylenes and benzene, theirs concentration varying with the time on stream of the process. The initial aromatization process described as dehydrocyclodimerization of alkanes and alkenes, principally to aromatics BTX and molecular hydrogen is accompanied by an oligomerization, isomerisation, cracking and alkylation process to form finally in the liquid product an excessively mixture of iso- and normal- C5 - C10 aliphatic hydrocarbons and ] C10.

Keywords:
light hydrocarbons; aromatization; ZnO/HZSM-5; solid-state ion exchange

Issue: 2020, Volume 71, Issue 2

Pages: 403-412

Publication date: 2020/3/3

https://doi.org/10.37358/RC.20.2.7943

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
ASAFTEI, I.V., SANDU, I., BILBA, N., LUNGU, N.C., IGNAT, M., MAHU, E., Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material, Rev. Chim., 71(2), 2020, 403-412.

Vancouver
Asaftei IV, Sandu I, Bilba N, Lungu NC, Ignat M, Mahu E. Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material. Rev. Chim.[internet]. 2020 Feb;71(2):403-412. Available from: https://doi.org/10.37358/RC.20.2.7943

APA 6th edition
Asaftei, I.V., Sandu, I., Bilba, N., Lungu, N.C., Ignat, M. & Mahu, E. (2020). Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material. Revista de Chimie, 71(2), 403-412. https://doi.org/10.37358/RC.20.2.7943

Harvard
Asaftei, I.V., Sandu, I., Bilba, N., Lungu, N.C., Ignat, M., Mahu, E. (2020). 'Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material', Revista de Chimie, 71(2), pp. 403-412. https://doi.org/10.37358/RC.20.2.7943

IEEE
I.V. Asaftei, I. Sandu, N. Bilba, N.C. Lungu, M. Ignat, E. Mahu, "Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material". Revista de Chimie, vol. 71, no. 2, pp. 403-412, 2020. [online]. https://doi.org/10.37358/RC.20.2.7943

Text
Iuliean V. Asaftei, Ion Sandu, Nicolae Bilba, Neculai Catalin Lungu, Maria Ignat, Elvira Mahu,
Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material,
Revista de Chimie,
Volume 71, Issue 2,
2020,
Pages 403-412,
ISSN 2668-8212,
https://doi.org/10.37358/RC.20.2.7943.
(https://revistadechimie.ro/Articles.asp?ID=7943)
Keywords: light hydrocarbons; aromatization; ZnO/HZSM-5; solid-state ion exchange

RIS
TY - JOUR
T1 - Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material
A1 - Asaftei, Iuliean V.
A2 - Sandu, Ion
A3 - Bilba, Nicolae
A4 - Lungu, Neculai Catalin
A5 - Ignat, Maria
A6 - Mahu, Elvira
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2020
VL - 71
IS - 2
SP - 403
EP - 412
UR - https://doi.org/10.37358/RC.20.2.7943
KW - light hydrocarbons
KW - aromatization
KW - ZnO/HZSM-5
KW - solid-state ion exchange
ER -

BibTex
@article{RevCh2020P403,
author = {Asaftei Iuliean V. and Sandu Ion and Bilba Nicolae and Lungu Neculai Catalin and Ignat Maria and Mahu Elvira},
title = {Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material},
journal = {Revista de Chimie},
volume = {71},
number = {2},
pages = {403-412},
year = {2020},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.20.2.7943},
url = {https://revistadechimie.ro/Articles.asp?ID=7943}
}

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