COMPARATIVE STUDY OF THE CATALYTIC STABILITY OF BIFUNCTIONAL NANOPOROUS- BASED CATALYSTS IN N-HEPTANE HYDROISOMERISATION (PPT)

摘要

1. The greater the value of nPt/nA, the slower the coke formation and the higher the catalyst stability. 2. The AHFS acid-leached zeolite had a larger pore volume (smaller pore size and larger surface area), due to the alleviation of the obstruction by EFAL of the mesopore system, thus slowing the formation of coke and providing good catalytic stability. 3. The higher Pt loading, up to 2 wt%, improved catalytic stability, due to a better balance and closeness of the catalytic functions. 4. Pt-Ni bimetallic catalysts were better than monometallic catalysts containing only Ni because they had higher activity, better selectivity for C7 isomers and more stability.