Microwave-Mediated Continuous Hydrogen Abstraction Reaction from 2-PrOH Catalyzed by Platinum on Carbon Bead

Abstract

We developed a microwave-mediated continuous hydrogen production method from 2-PrOH using platinum on a spherical carbon-bead catalyst. The catalyst cartridge consisted of helical glass part, and straight glass part (helix−straight cartridge) was newly developed for the effective microwave heating of 2-PrOH in the presence of 5% Pt/CB. The microwave resonance was properly adjusted within 2.4−2.5 GHz using the helix−straight cartridge with the glass resonance-adjuster tube. The reaction was conducted by the irradiation of only 10 W of single-frequency microwaves and the catalyst was used continuously for at least 13 h without any loss of catalyst activity.

Iridium‐Catalyzed Dehydrogenation in a Continuous Flow Reactor for Practical On‐Board Hydrogen Generation From Liquid Organic Hydrogen Carriers

“…48 [a] 102 [a] 584 [11b] 200 2922 390 [a] 714 [a] > 3000 [11b] [a] Substrate/catalyst ratio = 16000 : 1. Pt/C 160 Gas phase, heterogeneous 0.2 g H2 g À 1 Pt min À 1 [28] Cu/MCM-41 350 Gas phase, heterogeneous 0.05 g H2 g À 1 Cu min À 1 [29] Raney nickel 82 Liquid phase, heterogeneous 0.0025 g H2 g À 1 cat min À 1 [30] Cu/C 175 Gas phase, heterogeneous 0.014 g H2 g À 1 Cu min À 1 [31] Ru-pincer 90 Liquid phase, homogeneous 1.1 g H2 g À 1 Ru min À 1 (12 h), 4.7 g H2 g À 1 Ru min À 1 (0.3 h) [8] Supported Ir pincer 350 Gas phase, heterogeneous 25 g H2 g À 1 Ir min À 1 this work…”

Pt/CB-Catalyzed Chemoselective Hydrogenation Using in situ-Generated Hydrogen by Microwave Mediated Dehydrogenation of Methylcyclohexane under Continuous-Flow Conditions

“…We developed a hydrogen extraction reaction from methylcyclohexane (MCH) [47] and 2propanol (2-PrOH) [48] catalyzed by platinum-supported bead-shaped activated carbon (Pt/CB), which proceeded under single-mode MW irradiation conditions of only 10-20 W (Figure 1a). Furthermore, this MW-mediated selective CB heating reaction mechanism was developed into a Pt/CB-catalyzed intramolecular C-C bond formation reaction of diarylacetylene derivatives under MW-assisted continuous-flow conditions, namely, the synthesis of polycyclic aromatic compounds based on C-H activation [49] (Figure 1b).…”

Pt/CB-Catalyzed Chemoselective Hydrogenation Using In Situ-Generated Hydrogen by Microwave-Mediated Dehydrogenation of Methylcyclohexane under Continuous-Flow Conditions

“…We developed a hydrogen extraction reaction from methylcyclohexane (MCH) [47] and 2-propanol (2-PrOH) [48] catalyzed by platinum-supported bead-shaped activated carbon (Pt/CB), which proceeded under single-mode MW irradiation conditions of only 10-20 W (Figure 1a). Furthermore, this MW-mediated selective CB heating reaction was developed into a Pt/CB-catalyzed intramolecular C-C bond formation reaction of diarylacetylene derivatives under MW-assisted continuous-flow conditions, namely, the synthesis of polycyclic aromatic compounds based on C-H activation [49] (Figure 1b).…”