Highly selective skeletal isomerization of cyclohexene over zeolite-based catalysts for high-purity methylcyclopentene production

Cyclohexene skeletal isomerization towards methylcyclopentene is an economically favorable process due to the higher added value of the product. Traditional oxide-based catalysts face the challenge of achieving both high activity and stability. In this work, cyclohexene skeletal isomerization is achieved under mild conditions over designed zeolite-based catalysts with 96.8 wt.% liquid yield, 95.8 wt.% selectivity towards methylcyclopentene and satisfactory stability for multiple runs. The favorable performance is attributed to the unique acidic, structural and morphological features of the optimized cobalt/NaUZSM-5 catalyst. Further experimental data and DFT studies suggest that a carboncationic mechanism might be followed and that the reaction mainly occurs within the internal pores of the zeolite structures.

Entropy driven preference for alkene adsorption at the pore mouth as the origin of pore-mouth catalysis for alkane hydroisomerization in 1D zeolites

This work presents a theoretical basis for a pore-mouth catalysis model developed to explain the positional selectivity of skeletal isomerization on bifunctional metal acid-zeolite catalysts.

Highly Selective Skeletal Isomerization of Cyclohexene Over Zeolite-Based Catalysts for High-Purity Methylcyclopentene Production

Cyclohexene skeletal isomerization was achieved under mild conditions over rationally designed zeolite-based catalysts with high selectivity towards methylcyclopentene and satisfactory stability for multiple runs. The favorable performance was investigated, which can be attributed to unique acidic, structural and morphologic features of optimized Co/NaUZSM-5 catalyst. Further experimental data suggested that carboncationic mechanism might be followed and the reaction mainly occurs within the internal pores of zeolite structures, which was also validated by DFT study.

Templated coordination as a tool to increase the catalytic activity of metal aluminophosphates: the case of CoAPO-11

Site shifting by templated coordination aimed at enhancing the performance during n-butene skeletal isomerization under severe conditions.

Impact of new skeletal isomerization in polymer semiconductors

A new skeletal isomerization strategy for achieving high-performance polymer semiconductors based on asymmetric aromatic group-flanked diketopyrrolopyrrole units for application in organic field-effect transistors was highlighted.