Kinetics of consecutive heterogeneous catalytic reaction: Gas-phase hydrogenation of phenol on a platinum catalyst

Selective hydrogenation of phenol and related derivatives

“…[24][25][26][27] However, cyclohexanone is readily further hydrogenated to cyclohexanol under the investigated conditions. 18,22,[28][29][30][31][32][33][34][35] Another proposed reaction pathway involves cyclohexanol formation not only via cyclohexanone but also from 1-hydroxycyclohexene or directly from phenol. [36][37][38][39][40][41][42][43][44][45] In addition, some research groups have revealed that cyclohexanone and cyclohexanol are formed independently rather than at the expense of each other (Fig.…”

Selective Hydrogenation of Phenol

“…In 1970s, gas‐phase hydrogenation of phenol was carried out over Pt‐based catalysts which exhibited high catalytic activity . However, cyclohexanol instead of cyclohexanone was formed predominantly .…”

“…Considering the fact that the reaction routes and prerequisites for catalysts were different under different reaction conditions, the catalysts used in gas-phase and liquidphase hydrogenation of phenol were summarized and classified, respectively. 1%Pt/silica gel [15] 150 19 (initial) W/F 0.48 kg h mol À1 Fixed bed reactor 66.0 51.0 1%Pt/silica gel [15] 150 19 (initial) W/F 0.85 kg h mol À1 Fixed bed reactor 96.0 78.0 5%Pt/C [7a] 200 4.7 H 2 uptake 81.7 umol g À1 cat Fixed bed reactor 64.5 83.9 5%Pt-0.5%Cr/C [7a] 200 4.7 H 2 uptake 26.7 umol g À1 cat Fixed bed reactor 55.0 100 5%Pt-0.5%Zr/C [28] 200 4.7 H 2 uptake 20. [22] 150 -W/F phenol 385 g mol À1 h Fixed bed reactor 55.0 90.0 Pd/Ta 2 O 5 [22] 150 -W/F phenol 128 g mol À1 h Fixed bed reactor 54.0 87.0 Pd/graphite [22] 150 .…”

“…In 1970s, gas-phase hydrogenation of phenol was carried out over Pt-based catalysts which exhibited high catalytic activity. [15] However, cyclohexanol instead of cyclohexanone was formed predominantly. [16] Among the reported noble metal catalysts, Pd-based catalyst was declared with the best performance in phenol hydrogenation when the selectivity of cyclohexanone and production cost were taken into consideration.…”