Preparation of a highly efficient Pt/USY catalyst for hydrogenation and selective ring-opening reaction of tetralin

Abstract

Ultrastable Y zeolite (USY)-supported Pt catalyst was prepared by gas-bubbling-assisted membrane reduction. The influence of reaction conditions and the metal and acid sites of catalysts on the catalytic performance of catalyst in hydrogenation and selective ring opening of tetralin, 1,2,3,4-tetrahydronaphthalene (THN), was studied. It was found that the optimal reaction conditions were at a temperature of 280°C, hydrogen pressure of 4 MPa, liquid hourly space velocity of 2 h-1 and H 2 /THN ratio of 750. Under these optimal conditions, a high conversion of almost 100% was achieved on the 0.3Pt/USY catalyst. XRD patterns and TEM images revealed that Pt particles were highly dispersed on the USY, favorable to the hydrogenation reaction of tetralin. Ammonia temperature-programmed desorption and Py-IR results indicated that the introduction of Pt can reduce the acid sites of USY, particularly the strong acid sites of USY. Thus, the hydrocracking reaction can be suppressed.

Pd−Zn Alloy Nanoparticles Encapsulated into Mesoporous Silica with Confinement Effect for Highly Selective Semi‐Hydrogenation of Phenylacetylene

“…The hydrogenation path of phenylacetylene is shown in Scheme 2. The phenylacetylene reacts with one mole of hydrogen to obtain the target product styrene [43,44] . The second hydrogenation process is carried out when the styrene is failure to desorb in time, and the styrene will continue to react with hydrogen to generate the by‐product ethylbenzene.…”

Nanoparticle catalyzed hydrodesulfurization of diesel fuel in a trickle bed reactor: experimental and optimization study

“…The decrease was caused by the insufficient time of contact between the reactants on the surface of the nanocatalyst. 16,71 . A minimal reaction of DBT occurred due to the narrow pores of the nanocatalyst involving high-pressure activity to drive hydrogen and feedstock through the pores of the catalyst.…”

Highly Selective Hydrogenation of Tetralin to cis‐Decalin Using Ru Catalyst

“…Accordingly, using active hydrogenation catalysts is one way. Many metal catalysts have been developed, such as Pt, Ni,, Ir,, Pd,, Ru,, and Rh for tetralin hydrogenation. Besides, the acidic and adsorption properties of catalysts also influence the competition between hydrogenation and cis ‐to‐ trans isomerization.…”