Cargando…

The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process

One of the valuable fractions of paraffinic oils is the diesel fraction, which can be used as a commercial fuel. However, the high content of alkanes of normal structure (~10–40%) in the diesel fraction leads to a deterioration in the performance characteristics of the fuel and, as a result, the ina...

Descripción completa

Detalles Bibliográficos
Autores principales: Abdildina, Kamilla, Vassilina, Gulzira, Abdrassilova, Albina, Klassen, Ivan A., Orynbassar, Raigul, Kanapiyeva, Fatima
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673333/
https://www.ncbi.nlm.nih.gov/pubmed/38005320
http://dx.doi.org/10.3390/molecules28227598
_version_ 1785149597812785152
author Abdildina, Kamilla
Vassilina, Gulzira
Abdrassilova, Albina
Klassen, Ivan A.
Orynbassar, Raigul
Kanapiyeva, Fatima
author_facet Abdildina, Kamilla
Vassilina, Gulzira
Abdrassilova, Albina
Klassen, Ivan A.
Orynbassar, Raigul
Kanapiyeva, Fatima
author_sort Abdildina, Kamilla
collection PubMed
description One of the valuable fractions of paraffinic oils is the diesel fraction, which can be used as a commercial fuel. However, the high content of alkanes of normal structure (~10–40%) in the diesel fraction leads to a deterioration in the performance characteristics of the fuel and, as a result, the inability to use the diesel fraction without additional processing in the cold season at lower temperatures, which is critical for many regions with cold winters. The process of catalytic dewaxing is one of the most promising ways to improve the low-temperature characteristics of diesel fractions. This work is devoted to studying the activity of promoted Ni, Mo, and Ni-Mo catalysts based on mesoporous aluminosilicate and pre-activated bentonite in dewaxing diesel fractions. The effect of the nature and content of promoting additives on the activity of bifunctional catalysts in the process of hydroisodewaxing of diesel fraction in a flow-type reactor in the temperature range of 260–340 °C, pressure of 2 MPa and feed space velocity of 1 h(–1) was studied. It is shown that the synthesized bifunctional catalysts based on mesoporous aluminosilicate and pre-activated bentonite from the Tagan field (Ni/MAS-H-bentonite, Mo/MAS-H-bentonite, and Ni-Mo/MAS-H-bentonite) have the necessary balance of Lewis and Bronsted acid centers strengths. It allows them to selectively conduct the hydroisodewaxing process. It has been established that the use of the synthesized 5% Ni-1% Mo/MAS-H-bentonite bifunctional catalyst in the diesel fractions hydroisodewaxing process under optimal process conditions makes it possible to obtain diesel fuel with low-temperature characteristics that meet the requirements for cold climate fuels: cold filter plugging point (CFPP)—minus 33 °C, flash point in a closed cup—39 °C and pour point—minus 36 °C.
format Online
Article
Text
id pubmed-10673333
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-106733332023-11-15 The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process Abdildina, Kamilla Vassilina, Gulzira Abdrassilova, Albina Klassen, Ivan A. Orynbassar, Raigul Kanapiyeva, Fatima Molecules Article One of the valuable fractions of paraffinic oils is the diesel fraction, which can be used as a commercial fuel. However, the high content of alkanes of normal structure (~10–40%) in the diesel fraction leads to a deterioration in the performance characteristics of the fuel and, as a result, the inability to use the diesel fraction without additional processing in the cold season at lower temperatures, which is critical for many regions with cold winters. The process of catalytic dewaxing is one of the most promising ways to improve the low-temperature characteristics of diesel fractions. This work is devoted to studying the activity of promoted Ni, Mo, and Ni-Mo catalysts based on mesoporous aluminosilicate and pre-activated bentonite in dewaxing diesel fractions. The effect of the nature and content of promoting additives on the activity of bifunctional catalysts in the process of hydroisodewaxing of diesel fraction in a flow-type reactor in the temperature range of 260–340 °C, pressure of 2 MPa and feed space velocity of 1 h(–1) was studied. It is shown that the synthesized bifunctional catalysts based on mesoporous aluminosilicate and pre-activated bentonite from the Tagan field (Ni/MAS-H-bentonite, Mo/MAS-H-bentonite, and Ni-Mo/MAS-H-bentonite) have the necessary balance of Lewis and Bronsted acid centers strengths. It allows them to selectively conduct the hydroisodewaxing process. It has been established that the use of the synthesized 5% Ni-1% Mo/MAS-H-bentonite bifunctional catalyst in the diesel fractions hydroisodewaxing process under optimal process conditions makes it possible to obtain diesel fuel with low-temperature characteristics that meet the requirements for cold climate fuels: cold filter plugging point (CFPP)—minus 33 °C, flash point in a closed cup—39 °C and pour point—minus 36 °C. MDPI 2023-11-15 /pmc/articles/PMC10673333/ /pubmed/38005320 http://dx.doi.org/10.3390/molecules28227598 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abdildina, Kamilla
Vassilina, Gulzira
Abdrassilova, Albina
Klassen, Ivan A.
Orynbassar, Raigul
Kanapiyeva, Fatima
The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title_full The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title_fullStr The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title_full_unstemmed The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title_short The Role of Catalyst Promotive Additives and Temperature in the Hydroisodewaxing Process
title_sort role of catalyst promotive additives and temperature in the hydroisodewaxing process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10673333/
https://www.ncbi.nlm.nih.gov/pubmed/38005320
http://dx.doi.org/10.3390/molecules28227598
work_keys_str_mv AT abdildinakamilla theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT vassilinagulzira theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT abdrassilovaalbina theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT klassenivana theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT orynbassarraigul theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT kanapiyevafatima theroleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT abdildinakamilla roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT vassilinagulzira roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT abdrassilovaalbina roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT klassenivana roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT orynbassarraigul roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess
AT kanapiyevafatima roleofcatalystpromotiveadditivesandtemperatureinthehydroisodewaxingprocess