Lewis acid-base modulation for efficient CO2 oxidative propane dehydrogenation: A case study of a La-modified binuclear Feoxo site

Co-modified Fe2O3–ZrO2 for catalyzing propane and CO2 reaction to propylene

“…As seen from Fig. 10, at the beginning (30 °C), –OH (3734, 3700, 3679 cm −1 ), 37,38 –OH–(3631 cm −1 ), 39 –CH 3 (1453, 1443, 1375 cm −1 ) 40–42 of propane, and *CO 3 (1394 cm −1 ) 43,44 by CO 2 adsorption on the catalyst surface were observed. As the temperature increased, newly formed *HCO 3 (1650 cm −1 ) appeared 45,46 which was associated with the intermediates during propane activation.…”

“…As the temperature increased, newly formed *HCO 3 (1650 cm −1 ) appeared 45,46 which was associated with the intermediates during propane activation. 40 The intensity of this *HCO 3 species reached a maximum during 250–500 °C. Subsequently, this species disappeared.…”

“…Their absorbance intensity was strengthened upon increasing the temperature and extending time. The *OOCH species resulted from the reaction of CO 2 and dissociated *H species due to the C–H cleavage of propane, 40 which boosted the catalytic cycle during PDH–CO 2 . Furthermore, the intensity of the −CH 3 absorbance (1443 cm −1 ) was strengthened clearly in the range of 300 − 500 °C, strongly implying the formation of C 3 H 6 .…”

Catalyst development for O2-assisted oxidative dehydrogenation of propane to propylene

“…Song's group reported an efficient bifunctional CO 2 -ODHP site capable of activating C-H and CQO bonds with inhibited C-C scission capacity. 35 In detail, their work proposed a La-modified binuclear Feoxo (La-Feoxo) site stabilized on a silicalite-1 support, achieving 32.7% C 3 H 8 conversion with 83.2% C 3 H 6 selectivity. The improvement should be attributed to the balance in the acidbase property due to FeO x dispersion and La modification.…”

Suppressed Active Site Loss by Y-Doped ZnO/Silicalite-1 for Superior CO2 Oxidative Propane Dehydrogenation Performance by Microwave Catalysis

“…Propane dry reforming (DRP: C 3 H 8 + 3CO 2 → 6CO + 4H 2 ) is a major competing reaction for CO 2 −ODHP that produces syngas products and decreases propylene production. 7 time, the H 2 produced during the reaction tends to reduce the active metal ions to the metallic state, reducing the catalytic activity. 8 In addition, the dissociation energy of the C�O bond of CO 2 is 532.2 kJ/mol, which is very stable and difficult to activate at low temperatures.…”