Preparation of Co–Mo/Al2O3 model sulfide catalysts for hydrodesulfurization and their application to the study of the effects of catalyst preparation

Three-Dimensional NiS-MoS2/Graphene Heterostructured Nanohybrids as High-Performance Hydrodesulfurization Catalysts

“…Therefore, the development of active, stable, and low-cost catalyst systems for efficient hydrodesulfurization (HDS) is highly requisite . So far, most of the industrial HDS catalyst systems have been based on MoS 2 either supported or promoted with other active metals such as nickel (Ni) or cobalt (Co), widely noted as NiMoS and CoMoS phases. − The HDS catalytic mechanism using these hybrid catalysts was widely investigated by using classical-phase models, that is, active-phase model and remote-control model (RC). , According to phase-decoration model, the higher activity for the Ni- or Co-promoted MoS 2 catalyst is ascribed due to the realization of active Co–Mo–S and Ni–Mo–S phases . Nevertheless, the existence of such active phases was not directly identified and considered to be vulnerable at higher temperature, which is detrimental to the final catalytic activity .…”

Optimization of hybrid hyperbranched polymer/ceramic filters for the efficient absorption of polyaromatic hydrocarbons from water

“…Indeed the experimental results point to the ease of formation of nanolayered polymer films in pore surfaces of complex geometry that, in turn, increase absorption performance. The technique of double or multiple impregnations has already been used mainly for the preparation of novel catalytic ceramic membranes [34] or in order to induce special distribution properties [35] or a more homogenous dispersion [36] of the catalyst into the membrane but the use of the same material in the two impregnation stages is rare in bibliography [37]. In this case this procedure proved beneficial, improving the formation of a homogeneous polymeric layer inside the pores of the ceramic supports.…”

Synthesis And Characterization Of CoMo/Mordenite Catalyst For Hydrotreatment Of Lignin Compound Models

“…The impregnation method is affected by reaction conditions such as temperature, reflux time, pressure and the ratio of metal loaded [24]. While, the determinants factors of the catalysts-supported metals character are metal content [18], crystallinity [25], functional groups [26], acidity [27], surface area, pore size distribution, pore volume, particle size [28], and morphology [29].…”