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41 Table 2. Overview of the application of packed bed reactor consisting of permselective membrane coated catalyst particles reported in the literature. Reaction Reactor Type Feed Operating Conditions Core-Shell Catalyst Xmixed (%) Smixed (%) Ymixed (%) XMR. (%) SMR. (%) YMR. (%) References Disproportiona-tion of toluene PLMR product selective toluene 723–823 K p = 101.3 kPa WHSV = 0.1 h−1 silicalite coated on silica-alumina catalyst Sp-xylene = 22 Xtoluene = 63 Sp-xylene > 91 Xtoluene = 42 [245] Alkylation of toluene PLMR product selective toluene, methanol 673 K silicalite coated on H-ZSM-5 crystals with different Si/Al ratios Sp-xylene = 40 X = 75.7 Sp-xylene > 99.9 X = 54 [246,247] Hydro-formylation of 1-hexene batch type reactor product selective 1-hexene, carbon monoxide, hydrogen ◦ silicalite-1 coated on Pd–Co/activated carbon Shexan = 13.3 Sisomer = 15.4 Shexan = 28.3 Sisomer = 21.9 Hydrogenation of linear and branched alkenes PLMR reactant selective 1-hexene, 3,3-dimethyl-but-1-ene 323–373 K p = 101.3 kPa silicalite-1 coated on Pt/TiO2 particles X1-hex > 90 X3,3-DMB > 90 X1-hex > 90 X3,3-DMB < 10 [249,250] Oxidation of CO and n-butane PLMR reactant selective air, carbon monoxide and n-butane 483 K p = 101.3 kPa zeolite-4A coated on spherical Pt/γ-Al2O3 particles (two-steps hydrothermal synthesis) S = 1–1.2 Xn-butane = 95 S = 12–20 Xn-butane = 0 [251] Shape-selective hydrogenation of xylene isomers PLMR reactant selective p-/o-xylene or p-/m- xylene 473 K p = 1.0 MPa WHSV = 1.0 h−1 silicalite-1 coated on Pt/Al2O3 pellets - Sp/m = 13.6 XCH4 increases [252] Steam reforming of methane and toluene PLMR reactant selective methane or toluene, steam, helium 780–840 ◦C p = 1 bar CH4/H2O = 1 H2O/C7H8 = 7 Hβ zeolite coated on Ni/Mg/Ce0.6Zr0.4O2 pellets XCH4 increases with temperature up to ~20XC7H8 ~58 with temperature up to ~30 XC7H8 ~22 [242] 130 C H2/CO = 1 [248] Si-hept. = 37.1 Sn-nept. = 33.1 Si-hept. = 13.9 Sn-nept. = 35.9 XCO = 93 XCO > 90 Sp/o = 17PDF Image | Zeolite Catalysis
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