US 12,239,963 B2
Method for desulfurizing a hydrocarbon feedstock
Khalid R. Alhooshani, Dhahran (SA); and Saheed Adewale Ganiyu, Dhahran (SA)
Assigned to King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed by King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed on Oct. 19, 2022, as Appl. No. 17/969,480.
Application 17/969,480 is a division of application No. 16/454,849, filed on Jun. 27, 2019, granted, now 11,504,699.
Prior Publication US 2023/0048787 A1, Feb. 16, 2023
Int. Cl. C10G 45/08 (2006.01); B01J 21/08 (2006.01); B01J 27/051 (2006.01); B01J 35/61 (2024.01); B01J 35/63 (2024.01); B01J 35/64 (2024.01); B01J 37/00 (2006.01); B01J 37/02 (2006.01); B01J 37/04 (2006.01); B01J 37/10 (2006.01); B01J 37/18 (2006.01); B01J 37/20 (2006.01)
CPC B01J 27/0515 (2013.01) [B01J 21/08 (2013.01); B01J 35/615 (2024.01); B01J 35/635 (2024.01); B01J 35/647 (2024.01); B01J 37/0018 (2013.01); B01J 37/0205 (2013.01); B01J 37/0236 (2013.01); B01J 37/04 (2013.01); B01J 37/10 (2013.01); B01J 37/18 (2013.01); B01J 37/20 (2013.01); C10G 45/08 (2013.01); C10G 2300/1055 (2013.01); C10G 2300/70 (2013.01); C10G 2400/04 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for desulfurizing a hydrocarbon feedstock comprising a sulfur-containing compound, the method comprising:
first forming a NiMoS hydrodesulfurization catalyst in a single-step calcination and reduction method comprising:
mixing a silica source and an aqueous solution comprising a structural directing surfactant, an acid, and a molybdenum precursor to form a first mixture;
hydrothermally treating the first mixture at a temperature in a range of from 50 to 120° C. to form a first dried mass:
mixing a solution comprising a nickel precursor and the first dried mass to form a second mixture;
drying the second mixture at a temperature in a range of from 40 to 90° C. to form a catalyst precursor;
calcining the catalyst precursor in an atmosphere, comprising a reducing agent comprising H2, at a temperature in a range of from more than 350 to 600° C. to concurrently reduce the nickel precursor and form a calcined and reduced catalyst; and
sulfiding the calcined and reduced catalyst with a sulfide-containing solution thereby forming the NiMOS hydrodesulfurization catalyst,
wherein the first dried mass, the second mixture, and the catalyst precursor are not calcined prior to the calcining and are not catalytically active species, and then
contacting the hydrocarbon feedstock with the NiMOS hydrodesulfurization catalyst in the presence of H2 gas to convert at least a portion of the sulfur-containing compound into a mixture of H2S and a desulfurized product; and
removing H2S from the mixture thereby forming a desulfurized hydrocarbon stream,
wherein:
the NiMoS hydrodesulfurization catalyst comprises nickel sulfide and molybdenum sulfide disposed on a support material comprising a zirconium modified mesoporous silica with a Si:Zr weight ratio of 5:1 to 20:1;
the NiMOS hydrodesulfurization catalyst has a Mo content in a range of 8-20% by weight and a Ni content in a range of 1-6% by weight, each relative to a total weight of the NiMoS hydrodesulfurization catalyst; and
the NiMOS hydrodesulfurization catalyst has a BET surface area of 350-450 m2/g, a total pore volume of 0.52-0.8 cm3/g, and an average pore size of 4-7 nm.