Platinum‐promoted fibrous silica Y zeolite with enhanced mass transfer as a highly selective catalyst for n ‐dodecane hydroisomerization

Abstract

Summary A fibrous silica zeolite Y (HY@KCC‐1) catalyst with a high surface area of 568 m2/g and unique core‐shell morphology was successfully synthesized via a modified KCC‐1 synthesis method. Characterization of the catalysts was achieved with X‐ray powder diffraction (XRD), field emission scanning microscope (FESEM), N2 adsorption/desorption, and 2,6‐dimethylpyridine adsorbed Fourier‐transform infrared spectroscopy (FTIR). The Pt/HY@KCC‐1 has displayed complete n‐dodecane conversion coupled with an incredibly enhanced isomer yield of 72% at 350°C, nearly two‐fold higher than that of unmodified Pt/HY catalyst. Remarkably, Pt/HY@KCC‐1 had an internal effectiveness factor (η) of unity and negligible internal diffusion limitation, thus suggesting its potential application in hydroisomerization of higher hydrocarbons for enhancing fuel properties.

Isostructural Atomically Dispersed Rhodium Catalysts Supported on SAPO-37 and on HY Zeolite

“…Zeolites, especially those with acidic properties, find wide applications as catalysts and supports for metal catalysts. Examples are faujasites containing platinum, used for processes such as alkane hydrocracking and hydroisomerization, − and zeolite Beta and chabazite containing iron and copper, used for vehicle exhaust abatement. − The metals in these catalysts are typically highly dispersed to maximize their accessibility to reactants. The most highly dispersedatomically dispersedmetals are drawing wide attention because they maximize the number of metal atoms engaged in catalysis and have properties different from those of metals present in nanoparticles, the commonly applied form of supported metals …”

Fibrous spherical Ni‐M/ZSM‐5 (M: Mg, Ca, Ta, Ga) catalysts for methane dry reforming: The interplay between surface acidity‐basicity and coking resistance

“…The FESEM images (Figure A) show the coffin shape morphology of commercial ZSM‐5 support. Figure B,C shows the core shell morphology of fibrous ZSM‐5 . The TEM micrograph (Figure D) reveals the presence of dendrimers covering the core of FZSM‐5 support .…”