Clean Syn-Fuels via Hydrogenation Processes: Acidity–Activity Relationship in O-Xylene Hydrotreating
| Autor: | Lorenzo Spadaro, Alessandra Palella, Katia Barbera, Francesco Arena |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Sulfide
General Chemical Engineering chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis lcsh:Chemistry fuels synthesis o-xylene hydrogenation refinery isomerization process HDT catalysts acidity-activity relationship Organic chemistry Zeolite chemistry.chemical_classification General Engineering 021001 nanoscience & nanotechnology Acidity–activity relationship Fuels synthesis O-xylene hydrogenation Refinery isomerization process 0104 chemical sciences Acid strength Nickel n/a General Energy lcsh:QD1-999 chemistry 0210 nano-technology Hydrodesulfurization Cobalt Isomerization |
| Zdroj: | ChemEngineering, Vol 4, Iss 1, p 4 (2020) ChemEngineering 4 (2020). doi:10.3390/chemengineering4010004 info:cnr-pdr/source/autori:Alessandra Palella, Katia Barbera, Francesco Arena, Lorenzo Spadaro/titolo:Clean Syn-Fuels via Hydrogenation Processes: Acidity-Activity Relationship in O-Xylene Hydrotreating/doi:10.3390%2Fchemengineering4010004/rivista:ChemEngineering/anno:2020/pagina_da:/pagina_a:/intervallo_pagine:/volume:4 ChemEngineering Volume 4 Issue 1 |
| ISSN: | 2305-7084 |
| DOI: | 10.3390/chemengineering4010004 |
| Popis: | Transition metal sulfide catalysts are actually the most performing catalytic materials in crude oil hydrotreating (HDT), for energetic purposes. However, these systems suffer from several drawbacks that limit their exploitation. Aiming to meet the even more stringent environmental requirement, through a remarkable improvement of HDT performance in the presence of refractory feedstock (i.e., in terms of activity, selectivity, and stability), a deeper knowledge of the structure&ndash activity relationship of catalysts must be achieved. Therefore, in this study, CoMo/&gamma Al2O3 and NiMo/&gamma Al2O3 catalysts were characterized and tested in the o-xylene hydrogenation model reaction, assessing the influence of both support acidity and catalyst acid strength on reaction pathway by employing &gamma Al2O3 and Y-Type zeolite as acid reference materials. A clear relationship between concentration and strength of acid sites and the performance of the catalytic materials was established. Cobalt based catalyst (CoMoSx) proves a higher acidic character with respect to Nickel (NiMoSx), prompting isomerization reactions preferentially, also reflecting a greater o-xylene conversion. The different chemical properties of metals also affect the catalytic pathway, leading on the CoMoSx system to the preferential formation of p-xylene isomer with respect to m-xylene. |
| Databáze: | OpenAIRE |
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