Preparation of sulphide catalysts for heteroatom elimination in hydrocarbon refining

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F25%3A00618306" target="_blank" >RIV/67985858:_____/25:00618306 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43931568

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0263876225001248?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0263876225001248?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cherd.2025.03.016" target="_blank" >10.1016/j.cherd.2025.03.016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Preparation of sulphide catalysts for heteroatom elimination in hydrocarbon refining

Popis výsledku v původním jazyce

Sulphide catalysts containing Co, Ni, Mo and/or W catalyse hydrogenolysis of carbon sulphur/nitrogen/oxygen bonds and they are widely used in the hydrodesulphurization (HDS) of petroleum fractions. The HDS process produces H2S, which is subsequently partially oxidized to water and elemental sulphur in the Claus process. Nevertheless, this process can be overflowed with H2S. Sulphide catalysts are therefore investigated for the direct thermocatalytic decomposition of H2S to form H2 and elemental sulphur. This work tailors on a novel and straightforward preparation method of the unsupported form of Co/MoS2, Ni/MoS2, Ni/WS2 and Ni/MoWS2 catalysts. The aqueous slurry of CoCO3.Co(OH)2 or 2NiCO3.3Ni(OH)2.4H2O reacts with MoS2, WS2 or MoS2+WS2 during milling in a planetary mill. After drying and re-sulphidation, the catalyst is characterised by its specific surface area (SBET), free sulphur vacancies (O2 up-take), crystalline size of molybdenite and/or tungstenite (DXRD), activity in thiophene (Th) and 4,6-dimethyldibenzothiophene (4,6DMDBT) HDS, and activity in thermo-catalytic decomposition of H2S. We concluded that the prepared catalysts nare active in Th and 4,6DMDBT hydrodesulphurization, and thermo-catalytic decomposition of H2S. The Ni/WS2 is the most active in all reactions and also the most selective to direct desulphurization (DDS) during the 4,6DMDBT HDS. WS2 best suits the studied preparation method.n

Název v anglickém jazyce

Preparation of sulphide catalysts for heteroatom elimination in hydrocarbon refining

Popis výsledku anglicky

Sulphide catalysts containing Co, Ni, Mo and/or W catalyse hydrogenolysis of carbon sulphur/nitrogen/oxygen bonds and they are widely used in the hydrodesulphurization (HDS) of petroleum fractions. The HDS process produces H2S, which is subsequently partially oxidized to water and elemental sulphur in the Claus process. Nevertheless, this process can be overflowed with H2S. Sulphide catalysts are therefore investigated for the direct thermocatalytic decomposition of H2S to form H2 and elemental sulphur. This work tailors on a novel and straightforward preparation method of the unsupported form of Co/MoS2, Ni/MoS2, Ni/WS2 and Ni/MoWS2 catalysts. The aqueous slurry of CoCO3.Co(OH)2 or 2NiCO3.3Ni(OH)2.4H2O reacts with MoS2, WS2 or MoS2+WS2 during milling in a planetary mill. After drying and re-sulphidation, the catalyst is characterised by its specific surface area (SBET), free sulphur vacancies (O2 up-take), crystalline size of molybdenite and/or tungstenite (DXRD), activity in thiophene (Th) and 4,6-dimethyldibenzothiophene (4,6DMDBT) HDS, and activity in thermo-catalytic decomposition of H2S. We concluded that the prepared catalysts nare active in Th and 4,6DMDBT hydrodesulphurization, and thermo-catalytic decomposition of H2S. The Ni/WS2 is the most active in all reactions and also the most selective to direct desulphurization (DDS) during the 4,6DMDBT HDS. WS2 best suits the studied preparation method.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering Research and Design

ISSN

0263-8762

e-ISSN

1744-3563

Svazek periodika

216

Číslo periodika v rámci svazku

APR 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

515-522

Kód UT WoS článku

001459402700001

EID výsledku v databázi Scopus

2-s2.0-105001373267