Article info.

ABSTRACT

Received 28 Oct 2016
Revised 23 Dec 2016

Accepted 31 Oct 2017

A series of bifunctional catalysts, including sulfated zirconia, tungstated zirconia and alumina-supported zirconia as effective supports for Pt was prepared for isomerization reaction of pentane and hexane mixture at 7 atm. The structure and the surface property of denatured zirconium oxide catalysts were characterized by using physico-chemical methods such as X-ray diffraction, Brunauer–Emmett–Teller, scanning electron microscopy, transmission electron microscopy and temperature programmed reduction. Catalytic activity and stability in the isomerization reaction were studied in a micro-flow reactor under pressure of 7 atm and at 250°C, and molar ratio of H₂ : hydrocarbon mixture of 5.92. The coke deposited on catalyst surface was determined by a burn-off method. The mass of coke on Pt/ZrO₂-g-Al₂O₃ (Pt/ZrAl), Pt/ZrO₂-SO₄ (Pt/ZrS) and Pt/ZrO₂-WO₃ (Pt/ZrW) was 5.23%, 4.06% and 1.23% respectively.

Keywords

Hexane, isomerization, pentane, Pt/ZrAl, Pt/ZrS, Pt/ZrW

Cited as: Trung, N.D., Loc, L.C. and Tri, N., 2017. Determination of coke on promoted zirconium oxide catalysts in the isomerization re-action of pentane and hexane mixture at high pressure. Can Tho University Journal of Science. 7: 13-18.