Xylene isomerization kinetic over acid-functionalized silicalite-1 catalytic membranes: Experimental and modeling studies

Modelling and sensitivity analysis of a nanocomposite MFI-alumina based extractor-type zeolite catalytic membrane reactor for m-Xylene isomerization over Pt-HZSM-5 catalyst

“…Contrary to the studies of Deshayes et al [7] and Yeong et al [16], the model presented in this study uses an inert tubular nanocomposite MFI-alumina membrane prepared on ␣-alumina support via pore-plugging technique and incorporated in e-ZCMR as a separative unit. The first part of this paper compares the model outputs with the results of m-Xylene isomerization conducted over a commercial Pt-HZSM-5 catalyst and the second part explains the results of the sensitivity analysis performed on the model.…”

“…They predicted a 12% increase in p-Xylene yield over an equivalent FBR. Furthermore, Yeong et al [16] reported studies on the application of acid functionalized catalytic membrane reactors for isomerization of m-Xylene to p-Xylene. The authors reported p-Xylene yield of 17.5% and m-Xylene conversion of 31.2% at 628 K. However, for in-depth understanding of the fundamental behaviour of extractor-type catalytic membrane reactors during xylene isomerization, further modelling studies are still required.…”

Synthesis, characterization and reactive separation activity of acid-functionalized silicalite-1 catalytic membrane in m-xylene isomerization

“…Acid-functionalized silicalite-1 membranes were synthesized on a porous ␣-alumina support by in situ hydrothermal crystallization method as reported in our previous study [19] where x is molar ratio of the organosilane source, OS and x = 0.05, 0.10, 0.15 and 0.20. Two types of organosilane source used in the present study were 3-mercaptopropyltrimethoxysilane (3MP) (85%, Acros) and phenethyltrimethoxysilane (PE) (>97%, Fluka), respectively.…”

Zeolite Catalysis

“…In the majority of the applications of PBMRs the zeolite membranes were utilized either for selective product removal or for selective reactant supply. Similarly, in catalytic membrane reactors (CMR), where the zeolite membranes used display both catalytic activity and permselectivity, as shown schematically in Figure 8, e.g., dehydrogenation reactions [144], isomerization [159,160,164,165] and esterification reactions [167,230,231] have been investigated. However, it is the nature of the beast that not all the aforementioned reactions can be carried out in CMRs since zeolites simply are not the candidates of choice for all reactions.…”

“…However, experimental evaluation would be still interesting for the verification of the theoretical observations. Recently, Yeong [164] studied theoretically and experimentally the isomerization of m-xylene in acid-functionalized silicalite-1 catalytic membrane reactors. Propylsulfonic acid sites or arenesulfonic acid sites were provided to the inert silicalite-1 membranes via post-synthesis modifications.…”