Patent ID: 11938466
Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 8:
9. 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, wherein the catalyst system comprises:
a core comprising a ZSM-5 zeolite;
a shell comprising a mesoprous fibrous silica comprising KCC-1 and heteroatoms comprising aluminum, the shell in direct contact with at least a majority of an outer surface of the core; and
wherein:
the catalyst system has a Si/Al molar ratio of greater than 5 to equal or less than 20, and
at least a portion of the shell has a thickness of from 90 nanometers (nm) to 180 nm.