Catalyst systems and methods of synthesizing catalyst systems
AssigneeKing Abdullah University of Science and Technology
InventorsLeilei Xu, Jean-Marie Basset, Pradeep Kumar Doggali
Life of this patent
Estimating the term…
Abstract
Embodiments of catalyst systems and methods of synthesizing catalyst systems are provided. The catalyst system may include a core comprising a zeolite; and a shell comprising a microporous fibrous silica. The shell may be in direct contact with at least a majority of an outer surface of the core. The catalyst system may have a Si/Al molar ratio greater than 5. At least a portion of the shell may have a thickness of from 50 nanometers (nm) to 360 nm.
Claims20
A catalyst system comprising:
- a core comprising a zeolite;
- and
- a shell comprising a microporous fibrous silica, the shell in direct contact with at least a majority of an outer surface of the core;
- wherein the catalyst system has a Si/Al molar ratio greater than 5 and
- wherein at least a portion of the shell has a thickness of from 50 nanometers (nm) to 360 nm.
A method of synthesizing a catalyst system having a core-shell morphology, the method comprising:
- mixing cetyltrimethylammonium bromide, urea, aluminum isopropoxide, a zeolite, and water to produce a first solution;
- mixing a hydrocarbon solvent, tetraethyl orthosilicate, and a co-solvent to produce a second solution;
- mixing the first solution and the second solution to produce a mixture;
- and
- heating the mixture to produce the catalyst system.
A method for converting hydrocarbons, the method comprising:
- contacting a feed with a catalyst system, the catalyst system comprising:
- a core comprising a zeolite;
- and
- a shell comprising a microporous fibrous silica, the shell in direct contact with at least a majority of an outer surface of the core;
- wherein the catalyst system has a Si/Al molar ratio greater than 5;
- wherein at least a portion of the shell has a thickness of from 50 nanometers (nm) to 360 nm;
- wherein the shell pre-cracks the feed to produce a pre-cracked feed;
- and
- wherein the core cracks the feed to produce light olefins.
Dependencies are inferred from the claim text.