Preparation of supported hydrodesulfurization catalysts with enhanced performance using Mo-based inorganic–organic hybrid nanocrystals as a superior precursor

Synthesis of Al‐Containing Spherical Mesocellular Silica Foams with Different Pore Sizes and Their Applications as Catalyst Supports for Hydrodesulfurization of Dibenzothiophene

“…The sulfidation degree (Mo 4 + fractions %) attainst he maximum value (68.6 %) for the NiMo/Al-SMCFs-1.25 catalyst, indicating the weakestm etal-supporti nteraction because Mo sulfidation depends inverselyo nt he interaction betweent he active metal and support. [16] This viewpoint can be confirmed in the later H 2 -TPR analysis. Many previous reports have demonstrated thatt he sulfidation degree of MoS 2 -based HDSc atalysts is closely associated to the physicochemical properties of the catalysts.…”

“…Various hydrogenization products from the DBT HDS reaction were analyzed by an offline Finnigan Trace GC-MS. ATrace Ultral gas chromatograph with aH P-5 MS (60 m0.25 mm 0.25 mm) capillary column was also used with the offline Finnigan Trace GC-MS. Supposing ap seudo-first-order reaction for the HDS of DBT,t he catalytic activity was determined by the following Equation (1). [16,31] …”

“…Many previous reports have demonstrated thatt he sulfidation degree of MoS 2 -based HDSc atalysts is closely associated to the physicochemical properties of the catalysts. [15][16][17] Undert he condition of constant loadings of NiMo, ac atalyst with large surface area and high pore volume generally exhibits characteristics of ah igh sulfidation degree after presulfuration.T he larger the values for the BET surface area of the support,t he bettert he dispersion of the corresponding supported activem etals, and, therefore, high Mo dispersion can efficientlyp romote the occupation of Ni atoms on the edge sites of MoS 2 slabs and greatly favor the formationo f NiÀMoÀSa ctive phases, whichp robably leads to as light improvement of the sulfidation degree. [61,62] On the contrary,acatalyst with as mall surface area and low pore volumeh as al ower sulfidation degree, thus the order for sulfidation degree in this study is as follows:N iMo/Al-SMCFs-1.5 < NiMo/ Al-SMCFs-0.5 < NiMo/Al-SMCFs-0.75 < NiMo/Al-SMCFs-1 < NiMo/Al-SMCFs-1.25.…”

“…The proportion firstly increases and then decreases on increasing the amount of TMB in the initial mixture. When the mass ratio of TMP/P123 was increased to 1.25, the propor- [16] To further study the redox properties and the interaction between metal and support, TPR experimentsw ere performed. In the H 2 -TPR curves ( Figure 11)o ft he five studied catalysts, two obvious peaks can be observed in the range of 400-650a nd 800-1000 8Cf or each sample.…”

Two-dimensional layered MoS2: rational design, properties and electrochemical applications

“…Due to its high anisotropy and unique crystal structure, the properties of 2D MoS 2 can be tuned via reducing dimensions, intercalation, and formation of heterostructures. 16 As a well-known hydro-desulfurization catalyst, 17 MoS 2 has been considered as an ideal catalyst for the electrocatalytic hydrogen evolution reaction (HER) according to computational and experimental studies. 18 Hydrogen, an ideal energy carrier, plays a significant role in future technologies.…”