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Mesoporous superacid catalysts for valorisation of refinery naphtha stream

In the current petroleum refining scenario, many refineries end up with surplus naphtha which is either absorbed into the gasoline pool or exported at unattractive prices. Therefore, several options for naphtha valorisation are currently being explored. The usage of Liquified Petroleum Gas (LPG) as...

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Autores principales: Mehla, Sunil, Krishsna, Vamsi, Sriganesh, Gandham, Ravishankar, Raman
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086598/
https://www.ncbi.nlm.nih.gov/pubmed/35548827
http://dx.doi.org/10.1039/c8ra07024e
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author Mehla, Sunil
Krishsna, Vamsi
Sriganesh, Gandham
Ravishankar, Raman
author_facet Mehla, Sunil
Krishsna, Vamsi
Sriganesh, Gandham
Ravishankar, Raman
author_sort Mehla, Sunil
collection PubMed
description In the current petroleum refining scenario, many refineries end up with surplus naphtha which is either absorbed into the gasoline pool or exported at unattractive prices. Therefore, several options for naphtha valorisation are currently being explored. The usage of Liquified Petroleum Gas (LPG) as a fuel in heating appliances, cooking equipment and automobiles is rapidly increasing. The high specific calorific value, high octane number, clean and efficient combustion of LPG distinguish it as an extremely promising fuel of the future. In the current work, tungstophosphoric acid (TPA) supported on four different mesoporous silica supports were investigated as mesoporous superacids for hydroconversion of refinery naphtha using n-heptane as a model feedstock. The varied levels of interactions of prepared mesoporous silica with tungstophosphoric acid catalysts were observed to have a prominent effect on the strength of the acid sites generated on silica surfaces and as a result affected heptane hydroconversion activity and selectivity of isomerized and cracked products. Interestingly, activity could be tuned towards selective cracking or isomerization-cracking by selection of a suitable topology of mesoporous silica. Hexagonal Mesoporous Silica (HMS) and plugged SBA-15 supported TPA catalysts demonstrated high n-heptane conversion activity and isomerization selectivity whereas KIT-6 and SBA-15 supported TPA catalysts demonstrated high cracking selectivity to LPG.
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spelling pubmed-90865982022-05-10 Mesoporous superacid catalysts for valorisation of refinery naphtha stream Mehla, Sunil Krishsna, Vamsi Sriganesh, Gandham Ravishankar, Raman RSC Adv Chemistry In the current petroleum refining scenario, many refineries end up with surplus naphtha which is either absorbed into the gasoline pool or exported at unattractive prices. Therefore, several options for naphtha valorisation are currently being explored. The usage of Liquified Petroleum Gas (LPG) as a fuel in heating appliances, cooking equipment and automobiles is rapidly increasing. The high specific calorific value, high octane number, clean and efficient combustion of LPG distinguish it as an extremely promising fuel of the future. In the current work, tungstophosphoric acid (TPA) supported on four different mesoporous silica supports were investigated as mesoporous superacids for hydroconversion of refinery naphtha using n-heptane as a model feedstock. The varied levels of interactions of prepared mesoporous silica with tungstophosphoric acid catalysts were observed to have a prominent effect on the strength of the acid sites generated on silica surfaces and as a result affected heptane hydroconversion activity and selectivity of isomerized and cracked products. Interestingly, activity could be tuned towards selective cracking or isomerization-cracking by selection of a suitable topology of mesoporous silica. Hexagonal Mesoporous Silica (HMS) and plugged SBA-15 supported TPA catalysts demonstrated high n-heptane conversion activity and isomerization selectivity whereas KIT-6 and SBA-15 supported TPA catalysts demonstrated high cracking selectivity to LPG. The Royal Society of Chemistry 2018-10-02 /pmc/articles/PMC9086598/ /pubmed/35548827 http://dx.doi.org/10.1039/c8ra07024e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Mehla, Sunil
Krishsna, Vamsi
Sriganesh, Gandham
Ravishankar, Raman
Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title_full Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title_fullStr Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title_full_unstemmed Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title_short Mesoporous superacid catalysts for valorisation of refinery naphtha stream
title_sort mesoporous superacid catalysts for valorisation of refinery naphtha stream
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9086598/
https://www.ncbi.nlm.nih.gov/pubmed/35548827
http://dx.doi.org/10.1039/c8ra07024e
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