Highly active CoMoS phase on titania nanotubes as new hydrodesulfurization catalysts

2009 ◽  
Vol 90 (1-2) ◽  
pp. 213-223 ◽  
Author(s):  
J.A. Toledo-Antonio ◽  
M.A. Cortés-Jácome ◽  
C. Angeles-Chávez ◽  
J. Escobar ◽  
M.C. Barrera ◽  
...  
2015 ◽  
Vol 250 ◽  
pp. 60-65 ◽  
Author(s):  
Aline Villarreal ◽  
Jorge Ramírez ◽  
Luis Cedeño Caero ◽  
Perla Castillo Villalón ◽  
Aída Gutiérrez-Alejandre

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Hamdy Farag ◽  
Abd-Alrahman Embaby ◽  
Masahiro Kishida ◽  
Abdel-Nasser A. El-Hendawy ◽  
Mohamed Mahmoud Nasef

A series of unsupported MoS2, Co9S8, and Co-promoted MoS2 catalysts have been synthesized by tuned impregnation and successive thermal annealing methods using a continuous flow of a mixture of H2 and H2S gases. The resulting catalysts were evaluated in terms of their activity and selectivity for the hydrodesulfurization of dibenzothiophene (DBT) both in the absence and the presence of H2S. The inclusion of Co onto MoS2 affected both the hydrogenation and direct desulfurization reactions, with the latter (production of biphenyl) being magnified to a much greater degree than the former. Interestingly, low cobalt/molybdenum ratio of ca. 0.05 of the catalyst exhibited outstanding promotion efficiency in the hydrodesulfurization reaction. However, as cobalt is added, the synergy effect drastically decreased. H2S in the reaction mixture led to a remarkable step up in the product from the direct desulfurization reaction route with the most notable increases occurring for the product from the hydrogenation reaction pathway. The HDS activity of such catalysts was much higher than that of the commercial CoMo/Al2O3. The promotion by H2S was discussed.


2001 ◽  
Vol 204 (2) ◽  
pp. 495-497 ◽  
Author(s):  
I Bezverkhyy ◽  
P Afanasiev ◽  
C Geantet ◽  
M Lacroix

2014 ◽  
Vol 20 (S3) ◽  
pp. 1980-1981 ◽  
Author(s):  
C. Ornelas ◽  
R. Farias ◽  
A. Aguilar-Elguézabal ◽  
L. Alvarez-Contreras

Author(s):  
Alicja Urbaniak ◽  
Anna Skarpańska-Stejnborn

Abstract. The aim of the study was to review recent findings on the use of POM supplements in athletes of various disciplines and physically active participants. Eleven articles published between 2010 and 2018 were included, where the total number of investigated subjects was 176. Male participants constituted the majority of the group (n = 155), as compared to females (n = 21). 45% of research described was conducted on athletes, whereas the remaining studies were based on highly active participants. Randomised, crossover, double-blind study designs constituted the majority of the experimental designs used. POM supplementation varied in terms of form (pills/juice), dosage (50 ml–500 ml) and time of intervention (7 days–2 months) between studies. Among the reviewed articles, POM supplementation had an effect on the improvement of the following: whole body strength; feeling of vitality; acute and delayed muscle fatigue and soreness; increase in vessel diameter; blood flow and serum level of TAC; reduction in the rate of increase for HR, SBP, CK and LDH; support in the recovery of post-training CK, LDH, CRP and ASAT to their baseline levels; reduction of MMP2, MMP9, hsCRP and MDA; and increased activity of antioxidant enzymes (glutathione peroxidase and superoxide dismutase). In the majority of reviewed articles POM supplementation had a positive effect on a variety of parameters studied and the authors recommended it as a supplement for athletes and physically active bodies.


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