Characterization and HDS activity of Mo and NiMo sulfided catalyst prepared by thioglycolic acid assisted hydrothermal deposition method.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F22%3A00552065" target="_blank" >RIV/67985858:_____/22:00552065 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0327519" target="_blank" >http://hdl.handle.net/11104/0327519</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2022.163925" target="_blank" >10.1016/j.jallcom.2022.163925</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Characterization and HDS activity of Mo and NiMo sulfided catalyst prepared by thioglycolic acid assisted hydrothermal deposition method.

Popis výsledku v původním jazyce

Dispersed Ni-Mo sulfide catalysts were synthesized by hydrothermal deposition method with the assistance of thioglycolic acid as sulfiding agent ex situ at 160oC. The prepared samples were characterized by SBET, XRD, SEM, FTIR, XPS, TPR/TPS, TPD-NH3. The catalyst activity was investigated during hydrodesulfurization (HDS) of thiophene at 340oC. XRD and XPS methods showed that this hydrothermal synthesis of MoAl and NiMoAl solids yielded sulfide crystalline phases with high bulk and surface S/Mo ratio. Re-sulfidation of the Ni-containing samples led to an increase in surface area, which was thus able to redisperse the NiMo sulfide active sites. The results of temperature programmed sulfidation measurements combined with mass spectrometric analysis (TPS-MS) of the catalysts revealed the formation of a fraction of thioglycolic acid (TGA) species that remained in the pores of the sample with the highest TGA content. In the NiMo catalyst prepared at TGA/Mo molar ratio of four, this TGA enhanced the amount of NiMoS phase in the catalyst and positively affected the HDS activity.n

Název v anglickém jazyce

Characterization and HDS activity of Mo and NiMo sulfided catalyst prepared by thioglycolic acid assisted hydrothermal deposition method.

Popis výsledku anglicky

Dispersed Ni-Mo sulfide catalysts were synthesized by hydrothermal deposition method with the assistance of thioglycolic acid as sulfiding agent ex situ at 160oC. The prepared samples were characterized by SBET, XRD, SEM, FTIR, XPS, TPR/TPS, TPD-NH3. The catalyst activity was investigated during hydrodesulfurization (HDS) of thiophene at 340oC. XRD and XPS methods showed that this hydrothermal synthesis of MoAl and NiMoAl solids yielded sulfide crystalline phases with high bulk and surface S/Mo ratio. Re-sulfidation of the Ni-containing samples led to an increase in surface area, which was thus able to redisperse the NiMo sulfide active sites. The results of temperature programmed sulfidation measurements combined with mass spectrometric analysis (TPS-MS) of the catalysts revealed the formation of a fraction of thioglycolic acid (TGA) species that remained in the pores of the sample with the highest TGA content. In the NiMo catalyst prepared at TGA/Mo molar ratio of four, this TGA enhanced the amount of NiMoS phase in the catalyst and positively affected the HDS activity.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

903

Číslo periodika v rámci svazku

MAY 15

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

8

Strana od-do

163925

Kód UT WoS článku

000753459300004

EID výsledku v databázi Scopus

2-s2.0-85123349448