Comparison of performance of Ni–Mo/γ-alumina catalyst in HDS and HDN reactions of main distillate fractions

Abstract

A bimetallic nickel-molybdenum catalyst supported on γ-alumina was synthesized by the two-step incipient wetness impregnation technique. The activity of the prepared Ni-Mo/γ-alumina catalyst was evaluated in a down flow fixed-bed microreactor. In this way, hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) reactions of the main distillate fractions of crude oil were assessed. XRD, SEM, TPR, ICP-OES, BET-BJH and nitrogen adsorption/desorption methods were used for characterizing the synthesized Ni-Mo/γ-alumina catalyst. The active metals with Ni/Mo mass ratio of 0.23 and total metal of 13.7 wt% were loaded on the support, similar to the commercial industrial catalyst. The performance tests were conducted at 3.0 MPa (for light naphtha and heavy naphtha) and at 4.5 MPa (for kerosene and gas oil). The results revealed that the total sulfur conversion of the light naphtha, heavy naphtha, kerosene and gas oil fractions was 98.3%, 95%, 91.7% and 90.1% (after 24 h), respectively.

Synthesis of NiMo/Al2O3 Nanocatalyst by one pot Co-impregnation Route

“…The appearance of these peaks can be attributed to the presence of Mo species and varying degree of the peaks are the result of the difference in the degree of crystalline , as well as the effect of calcination at high temperatures which depends on the crystallinity of the nanoparticles. On comparing these results with the peaks in previously reported that results are in agreement with the XRD of NiMo/γ-Al2O3 with her [23][24][25][26]. The most common NiO and Ni2O3 may also be present in the amorphous phase or microcrystals [13].…”

Converting Cyclohexanone to Liquid Fuel-Grade Products: A Characterization and Comparison Study of Hydrotreating Molybdenum Catalysts

“…Owing to the low concentration, well dispersion, and small size of cobalt and nickel particles, the weakly associated peaks were obtained. Such behavior was also reported in the previous studies dedicated to NiMo [78][79][80][81] and CoMo [82,83] catalysts. The wt.%, as well as well particle distribution, were obtained by EDXS and mapping analysis (Table 1 and Figures S1-S4).…”

Valorisation of glycerol through catalytic hydrogenolysis routes for sustainable production of value-added C3 chemicals: current and future trends

“…118,119 Nickel supported on conventional γ-alumina has been extensively investigated in glycerol hydrogenolysis because of the high dispersion, Lewis acidity, and textural properties. 120 For instance, Pudi et al (2015) 129 have developed a Cu–Ni/γ-Al 2 O 3 catalyst for the glycerol hydrogenolysis process. Only 2 g of Cu–Ni/γ-Al 2 O 3 catalyst was required to exhibit a high glycerol conversion of 59.3% at 493 K, 4.5 MPa H 2 pressure, and 12 h. Liu et al (2014) have reported a maximum glycerol conversion and 1,2-PDO selectivity of 92.3% and 94.5%, respectively, using a Cu/ZnO/Al 2 O 3 catalyst prepared via oxalate gel co-precipitation.…”