Theoretical insight into the catalytic effect of transition metal ions on the aquathermal degradation of heavy oil: A DFT study of cyclohexyl phenyl amine cleavage

Fuel ◽  
2022 ◽  
Vol 312 ◽  
pp. 123002
Nail R. Khafizov ◽  
Timur I. Madzhidov ◽  
Chengdong Yuan ◽  
Mikhail A. Varfolomeev ◽  
Oleg N. Kadkin
ACS Omega ◽  
2020 ◽  
Vol 5 (31) ◽  
pp. 19589-19597
Ilya Tverdov ◽  
Nail R. Khafizov ◽  
Timur I. Madzhidov ◽  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan ◽  

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1399
Silva Stanchovska ◽  
Georgy Ivanov ◽  
Sonya Harizanova ◽  
Krasimir Tenchev ◽  
Ekaterina Zhecheva ◽  

Elaboration of Pd-supported catalysts for catalytic combustion is, nowadays, considered as an imperative task to reduce the emissions of methane. This study provides new insight into the method of deposition, chemical state of Pd and oxygen storage capability of transition metal ions and their effects on the catalytic reactivity of supported catalysts for the combustion of methane. The catalyst with nominal composition La(Co0.8Ni0.1Fe0.1)0.85Pd0.15O3 was supported on SiO2-modified/γ-alumina using two synthetic procedures: (i) aerosol assisted chemical vapor deposition (U-AACVD) and (ii) wet impregnation (Imp). A comparative analysis shows that a higher catalytic activity is established for supported catalyst obtained by wet impregnation, where the PdO-like phase is well dispersed and the transition metal ions display a high oxygen storage capability. The reaction pathway over both catalysts proceeds most probably through Mars–van Krevelen mechanism. The supported catalysts are thermally stable when they are aged at 505 °C for 120 h in air containing 1.2 vol.% water vapor. Furthermore, the experimentally obtained data on La(Co0.8Ni0.1Fe0.1)0.85Pd0.15O3—based catalyst, supported on monolithic substrate VDM®Aluchrom Y Hf are simulated by using a two-dimensional heterogeneous model for monolithic reactor in order to predict the performance of an industrial catalytic reactor for abatement of methane emissions.

RSC Advances ◽  
2014 ◽  
Vol 4 (56) ◽  
pp. 29702-29714 ◽  
Yan Li ◽  
Yiming Jia ◽  
Zhenwen Wang ◽  
Xianghui Li ◽  
Wen Feng ◽  

Disruption of intramolecular H-bonding via N-substitution leads to rotational isomerization and much improvement in extraction of Hg2+.

1988 ◽  
Vol 20 (10) ◽  
pp. 45-47 ◽  
M. Reda

The general effects of Fe(III), Cu(II) and Mn(II) on the homogeneous catalytic auto-oxidation of aqueous sulfur(IV) were investigated. The results indicated that Fe(III) and Mn(II) are effective catalysts, and Cu(II) has a slight catalytic effect compared with distilled water. The apparent synergisms existing between Mn(II) and Cu(II), Mn(II) and Fe(III), and Fe(III) and Cu(II) were investigated.

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