Vagif Malik Akhmedov

Recent Advances and Future Aspects in the Selective Isomerization of High n‐Alkanes

This article provides an overview of the advances that have been marked during the last decades in the field of hydroconversion of high n‐alkanes (C7 +) with particular stress on the promising ways to meet the requirements for improved quality of motor fuels and oils. Particular attention is given to a catalyst formulation for selective conversion of high n‐alkanes to branched hydrocarbons. The challenge for successfully solving this problem is to find an effective catalyst favoring the isomerization of n‐alkanes without too much cracking. The regulation of active sites and adsorption properties, as well as the topology of support surfaces, allows a more predictive design of novel catalysts for selective conversion of high n‐alkanes into their branched isomers.

Hydroconversion of C5–C8 alkanes over Zr-containing supported catalysts prepared by metal vapor method

Abstract Zr-containing supported catalysts (Zr/ZSM-5, Zr-Re/ZSM-5 and Zr-Ni/ZSM-5) were prepared by metal vapor method (MVM). The isomerization and cracking activity and selectivity of prepared catalysts were investigated in hydroconversion of n -C 5 –C 8 alkanes. Results have shown that activity and selectivity of bimetallic catalysts toward hydroconversion of tested hydrocarbons were much higher than those over monometallic Zr/ZSM-5. The most significant difference was observed in the presence of Zr-Ni/ZSM-5 catalyst: n -pentane and n -hexane underwent isomerization while n -heptane was converted virtually to iso -butane and propane under mild conditions. This catalyst demonstrated high internal CC bond cleavage selectivity also in hydroconversion of n -octane.

RECENT ADVANCES AND FUTURE ASPECTS IN THE LOW-TEMPERATURE CONVERSION OF SATURATED HYDROCARBONS

A brief review on the advances and future aspects in the low-temperature activation of carbon–hydrogen and carbon–carbon bonds in hydrocarbons is presented. Particular attention is given to a catalyst formulation for low-temperature conversion of hydrocarbons. An efficient catalyst design method for low-temperature activation of saturated hydrocarbons has been worked out using metal evaporation techniques. The characteristic property of such catalysts is the presence of metal particles on the surface in an atomically dispersed state. Some of the prepared catalysts cause complete hydrocracking of alkanes and cycloalkanes at 423–463K.