Koo, Hyun Mo Park, Myung June Moon, Dong Ju Bae, Jong Wook 2024-01-19T22:33:08Z 2024-01-19T22:33:08Z 2021-09-03 2018-06 0256-1115 https://pubs.kist.re.kr/handle/201004/121304 Kinetic models of CO hydrogenation to paraffinic hydrocarbons through Fischer-Tropsch synthesis (FTS) reaction were studied by using Langmuir-Hinshelwood Hougen-Watson (LHHW) model of 16 different reaction steps with a pseudo steady-state assumption (PSSA) on the prototype Pt-promoted Co/Al2O3 catalyst having a granule size of similar to 1 mm of spherical gamma-Al2O3 support (surface area of 149m(2)/g). The derived kinetic models from ten sets of experimental data by altering the reaction conditions such as temperatures, pressures, space velocities and H-2/CO molar ratios were found to be well fitted with reasonable kinetic parameters and small errors of conversion of CO and hydrocarbon distributions in terms of mean absolute relative residual (MARR) and relative standard deviation error (RSDE). The derived reaction rates and CO activation energy of -86 kJ/mol well correspond to the our previously reported results using power-type catalysts. Based on the LHHW model with PSSA, the possible chemical intermediates on the granule ball-type Co-Pt/Al2O3 surfaces were precisely considered to explain the typical adsorption, initiation, propagation and termination steps of FTS reaction as well as to derive elementary reaction rates with their kinetic parameters and hydrocarbon distributions. The derived kinetic models were further used to verify temperature-profiles in a pilot-scale fixed-bed tubular FTS reactor with a packing depth of 100 cm catalyst, and it confirmed that the temperature gradients were less than 10 A degrees C in a length of reactor by effectively removing the generated heat by an exothermic FTS reaction. English KOREAN INSTITUTE CHEMICAL ENGINEERS CO HYDROGENATION HYDROCARBON SYNTHESIS COBALT CATALYSTS MESOPOROUS CO3O4 CARBON-MONOXIDE CHAIN GROWTH MECHANISM ALUMINA RUTHENIUM SURFACE Kinetic models of Fischer-Tropsch synthesis reaction over granule-type Pt-promoted Co/Al2O3 catalyst Article 10.1007/s11814-018-0032-x 1 KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.35, no.6, pp.1263 - 1273 KOREAN JOURNAL OF CHEMICAL ENGINEERING 35 6 1263 1273 scie scopus kci ART002347788 000435004500005 2-s2.0-85044210732 Chemistry, Multidisciplinary Engineering, Chemical Chemistry Engineering Article CO HYDROGENATION HYDROCARBON SYNTHESIS COBALT CATALYSTS MESOPOROUS CO3O4 CARBON-MONOXIDE CHAIN GROWTH MECHANISM ALUMINA RUTHENIUM SURFACE Fischer-Tropsch Synthesis (FTS) Reaction Cobalt-based FTS Catalyst Kinetic Parameter Estimations Langmuir-Hinshelwood Hougen-Watson (LHHW) Model Pseudo Steady-state Assumption (PSSA)