Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange

Asaftei, Iuliean Vasile; Sandu, Ion; Lungu, Neculai Catalin; Spac, Adrian Florin; Ignat, Maria

Iuliean Vasile Asaftei, Ion Sandu, Neculai Catalin Lungu, Adrian Florin Spac, Maria Ignat

Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange

Abstract:

Paraffin’s and olefins in the cracked naphtha can be transformed into aromatics and iso-paraffins to reduce the olefins content as well to improve the octane number of the gasoline commercial fraction. In this work Ni-HZSM-5 bifunctional catalyst was prepared by ion exchange with Ni(NO3)2 aqueous solution. The activity of Ni-HZSM-5 (wt.% 1.34% Ni) catalyst prepared by ion exchange method was investigated in the conversion of light hydrocarbons resulted as by-products of petroleum refining process (mixtures of butenes and (normal + iso) butanes as main components). The obtained Ni-based catalyst has been compare with HZSM-catalyst. The conversion experiments have been performed in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450oC, under 4 atm. (over Ni-HZSM-5) and 8 atm. pressure (over HZSM-5), respectively and at a space velocity (WHSV) of 1h-1. The catalytic activity of (Ni-HZSM-5 catalyst) monitored over 10 catalytic tests (with regeneration of catalyst after each test) using a mixtures butanes-butylenes. The catalytic activity and selectivity towards liquid products - BTX aromatic hydrocarbons and oligo(iC5-iC10, nC5-nC10, ] C10) - depends on time streaming, composition of butanes-butylenes mixture and pressure. In the first hours of each test the aromatic BTX are the main component of the liquid product (connected with butylenes consume) and after that, the oligo fraction become predominant. The initial aromatization process described as dehydrocyclodimerization of alkanes and alkenes, principally to aromatics BTX and molecular hydrogen, is accompanied by oligomerization, isomerization, cracking and alkylation processes to form finally in the liquid phase product an excessively mixture of iso- and normal - C5 -C10 and ] C10 aliphatic hydrocarbons.

Keywords:
light hydrocarbons; aromatization; dehydrocyclodimerization; HZSM-5; Ni-HZSM-5

Issue: 2018, Volume 69, Issue 4

Pages: 938-943

Publication date: 2018/5/15

https://doi.org/10.37358/RC.18.4.6232

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Citation Styles

Cite this article as:
ASAFTEI, I.V., SANDU, I., LUNGU, N.C., SPAC, A.F., IGNAT, M., Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange, Rev. Chim., 69(4), 2018, 938-943.

Vancouver
Asaftei IV, Sandu I, Lungu NC, Spac AF, Ignat M. Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange. Rev. Chim.[internet]. 2018 Apr;69(4):938-943. Available from: https://doi.org/10.37358/RC.18.4.6232

APA 6th edition
Asaftei, I.V., Sandu, I., Lungu, N.C., Spac, A.F. & Ignat, M. (2018). Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange. Revista de Chimie, 69(4), 938-943. https://doi.org/10.37358/RC.18.4.6232

Harvard
Asaftei, I.V., Sandu, I., Lungu, N.C., Spac, A.F., Ignat, M. (2018). 'Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange', Revista de Chimie, 69(4), pp. 938-943. https://doi.org/10.37358/RC.18.4.6232

IEEE
I.V. Asaftei, I. Sandu, N.C. Lungu, A.F. Spac, M. Ignat, "Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange". Revista de Chimie, vol. 69, no. 4, pp. 938-943, 2018. [online]. https://doi.org/10.37358/RC.18.4.6232

Text
Iuliean Vasile Asaftei, Ion Sandu, Neculai Catalin Lungu, Adrian Florin Spac, Maria Ignat,
Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange,
Revista de Chimie,
Volume 69, Issue 4,
2018,
Pages 938-943,
ISSN 2668-8212,
https://doi.org/10.37358/RC.18.4.6232.
(https://revistadechimie.ro/Articles.asp?ID=6232)
Keywords: light hydrocarbons; aromatization; dehydrocyclodimerization; HZSM-5; Ni-HZSM-5

RIS
TY - JOUR
T1 - Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange
A1 - Asaftei, Iuliean Vasile
A2 - Sandu, Ion
A3 - Lungu, Neculai Catalin
A4 - Spac, Adrian Florin
A5 - Ignat, Maria
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2018
VL - 69
IS - 4
SP - 938
EP - 943
UR - https://doi.org/10.37358/RC.18.4.6232
KW - light hydrocarbons
KW - aromatization
KW - dehydrocyclodimerization
KW - HZSM-5
KW - Ni-HZSM-5
ER -

BibTex
@article{RevCh2018P938,
author = {Asaftei Iuliean Vasile and Sandu Ion and Lungu Neculai Catalin and Spac Adrian Florin and Ignat Maria},
title = {Transformation of Gaseous Technical Mixture of the Alkanes and Alkenes Into Liquid Fraction Over Ni-HZSM-5 Obtained by Ionic Exchange},
journal = {Revista de Chimie},
volume = {69},
number = {4},
pages = {938-943},
year = {2018},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.18.4.6232},
url = {https://revistadechimie.ro/Articles.asp?ID=6232}
}

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