Synthesis of trimetallic nanocatalysts of alumina supported Ni-Mo-W by ultrasound-precipitation method for thiophene hydrodesulfurization | ||
| شیمى کاربردى روز | ||
| Article 38, Volume 15, Issue 54, March 2020, Pages 153-166 PDF (604.79 K) | ||
| Document Type: Original Article | ||
| DOI: 10.22075/chem.2019.17076.1592 | ||
| Authors | ||
| Dariush Moghaddam Nejad1; Somaiyeh Allahyari* 2; Nader Rahemi1 | ||
| 1Sahand University of Technology | ||
| 2Assistant professor in Sahand University of Technology | ||
| Receive Date: 29 January 2019, Revise Date: 05 March 2019, Accept Date: 12 March 2019 | ||
| Abstract | ||
| In this study trimetallic Ni-Mo-W/alumina catalysts with different percentages of tungsten were synthesized by a hybrid method of ultrasound-precipitation. Synthesized catalysts were characterized by XRD, BET, FTIR, FESEM and EDX and then were evaluated in hydrodesulfurization of thiophene. Thiophene removal in trimetallic Ni-Mo-W/alumina catalysts reached to 89.23% while was 66.72% for bimetallic similar catalyst. Among different tungsten contents the highest thiophene removal and butane/butene ratio was attributed to the catalyst with 6% wt. tungsten. This catalyst showed small nano crystallites of metal oxides with uniform morphology with average size of 13 nm. The post characterization tests confirmed the stability in crystals of catalyst but some changes in morphology and functional groups were observed. Moreover the effect of residence time and thiophene concentration on the activity and selectivity of the trimetallic catalyst with 6% wt. tungsten was studied and the results showed with increasing the reaction time and reducing thiophene concentration, activity of the catalyst enhanced. | ||
| Keywords | ||
| Hydrodesulfurization; Alumina; Ni-Mo-W; Nanocatalyst; Ultrasound-precipitation | ||
| References | ||
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