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A comparative study on the alkylation of benzene with propene over HBeta zeolites in different phases

“…The current results are consistent with those reported in the references [4][5][6][7], the liquid-like densities and enhanced transport properties of SCF are exploited to extract coke precursors in situ, thereby extending the catalyst activity. Moreover, the operation in the regions near the critical point was most desirable for the effective removal of the coke precursors and to promote the catalytic reaction.…”

“…The alkylation with a benzene/propene mole ratio of 5 on a series of Beta zeolites exhibited that the yield of cumene and the stability of catalysts reached the highest when the reaction was carried out under supercritical conditions near the critical point [7]. However, the results were rather vague because the different phases were categorized according to the V-L equilibria of the binary system of benzene + propene, which is actually improper because the composition and related critical properties of the reacting mixture change always along the reaction course.…”

Optimal feed ratio of benzene–propylene binary mixtures for alkylation in ZSM-5 by molecular simulation

“…Interestingly, at the near supercritical condition, the equilibrium ratio of benzene/propylene in ZSM-5 is closest to 1. As Meng et al [6] mentioned, the near-critical supercritical fluids have the liquid-like density and gas-like transport properties, which is desirable for effective Table 4. Table 4 The equilibrium ratio of benzene/propylene and the selectivity of cumene in different phases L b and L p are the mean loadings of benzene and propylene, respectively.…”

“…Supercritical fluid technology is one of the new technologies in chemical industry for environmentally friendly processes [2,6,7]. It has been developing quickly since the 1980s.…”

“…Supercritical fluids have many special properties, such as good heat transfer and mass transfer properties, excellent dissolution properties for the coke deposited on catalysts, etc [8]. Supercritical conditions can accelerate reaction rate and improve product selectivity and reduce catalyst coking [6,9]. Therefore, we intend to explore the system of benzene alkylation with propylene in ZSM-5 at supercritical conditions.…”