Applied Catalysis A: General p. 62 - 68 (2014)
Update date:2022-09-26
Topics:
Espinoza-Armenta
Cruz-Reyes
Paraguay-Delgado
Del Valle
Alonso
Fuentes
Romero-Rivera
Five unsupported, highly active CoMoW trimetallic nanocatalysts were obtained by in situ decomposition from five novel precursors: (NH4)2[Co(MoS4)(WS4)] and (RN(CH3)3)2[(MoS4)(WS4)] (where R = dodecyl, tetradecyl, cetyl and octadecyl), during the HDS of DBT. The catalyst labeled CoMoWS-C14, derived from the precursor containing the tetradecyl group, exhibits the highest catalytic activity (k = 421 × 10-7mol/gs). N2 adsorption-desorption shows that the CoMoW catalysts are mesoporous materials with characteristic Type IV isotherms, having surface areas of 11-340m2/g. Elemental analysis by X-ray energy dispersive spectroscopy (EDS) working at STEM mode finds high concentrations of carbon (3.7 < C/Mo < 11.3 and 2.7 < C/W < 9) in all the catalysts except CoMoWS, where carbon was not detected. The XRD patterns show that the catalysts are highly dispersed (less so for the CoMoWS) given the absence of the (00 2) reflection, along with broad and low intensity (101) and (110) reflections. High dispersion is also supported by the STEM micrographs showing unstacked layers. The selectivity of the reaction for all catalysts favors the direct desulfurization pathway. The surface area and high catalytic activity do not show direct correlation with the length of the hydrocarbon chains of the precursors.
View MoreBeijing Cooperate Pharmaceutical Co.,Ltd
Contact:86-01060279497
Address:No.507,Building 4,Tianhua Street, Biomedicine industrial Base
Sichuan WeiKeqi Biological Technology Co., Ltd.
Contact:86-028-81700200
Address:sichuan Chengdu Qingjiang Zhonglu 63号
Contact:86-21-50966856
Address:Building 5,300 Chuanzhan Road,Pudong New District,Shanghai
Mollt Biochem Co., Ltd(expird)
Contact:+86-21-38682181
Address:shanghai ,china
Shanghai Yuantai Chemical Products Co., Ltd
Contact:021--66129803
Address:Chengyin Road,Shanghai,China
Doi:10.1134/S1070428013070130
(2013)Doi:10.1021/ol006485d
(2000)Doi:10.1016/S0960-894X(00)00456-X
(2000)Doi:10.1021/ja001626s
(2000)Doi:10.1002/ejoc.201900935
(2019)Doi:10.1002/hlca.19540370310
(1954)