Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model

Rossi, Giovanni E.; Winfield, John M.; Meyer, Nathalie; Jones, Don H.; Carr, R. H.; Lennon, David

doi:10.1016/j.apcata.2020.117900

Cited by 6 publications

(29 citation statements)

References 16 publications

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“…The extent of retained chlorine is within the range observed previously. 5 The error on the bromine analysis corresponds to a variance of ±72%, which reflects the variability of the bromine content observed in the different scans that ranged from 0–4.2 wt %. This dispersion indicates an uneven distribution of bromine throughout the areas examined.…”

Section: Resultsmentioning

confidence: 99%

“…A similar situation was previously reported for chlorine. 5 Small quantities (<1 wt %) of Si, Al, and S are additionally observed; the origins of these signals are unknown.…”

Section: Resultsmentioning

confidence: 99%

“…The following reaction scheme has recently been proposed by the authors to account for the reaction of CO and Cl 2 over activated carbon at 323 K to selectively produce COCl 2. 5 where eqs 6 – 9 constitute the reaction model to account for the reaction of CO (g) and Cl 2(g) over activated carbon (Donau Supersorbon K40) at 323 K to produce phosgene. K 1 and K 2 are equilibrium constants and k 1–3 are rate coefficients.…”

Section: Discussionmentioning

confidence: 99%

“…Chlorine adsorbed on Type I sites is designated by Cl′ (ad) , while chlorine at Type II sites is designated by Cl″ (ad) . 5 Importantly, chlorine atoms chemisorbed at Type I sites are thought to be in equilibrium with chlorine atoms residing in Type II sites ( eq 10 ). 5 …”

Section: Discussionmentioning

confidence: 99%

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Phosgene Synthesis Catalysis: The Influence of Small Quantities of Bromine in the Chlorine Feedstream

Rossi

Winfield

Meyer

et al. 2021

Ind. Eng. Chem. Res.

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The effect of relatively low concentrations of Br 2(g) in the Cl 2(g) feedstock for phosgene synthesis catalysis via the reaction of CO (g) and Cl 2(g) over activated carbon (Donau Supersorbon K40) is explored. Under the stated reaction conditions and in the absence of a catalyst, BrCl (g) forms from the reaction of Cl 2(g) and Br 2(g) . Phosgene synthesis over the catalyst at 323 K is investigated for Br 2(g) :Cl 2(g) molar flow ratios in the range 0–1.52% (0–15,190 ppm) and shows enhanced rates of phosgene production. Maximum phosgene production is observed at a Br 2(g) :Cl 2(g) molar flow ratio of 1.52% (15,190 ppm), which corresponds to an enhancement in the rate of phosgene production of ∼227% with respect to the phosgene flow rate observed in the absence of an incident bromine co-feed. A reaction model is proposed to account for the experimental observables, where BrCl (g) is highlighted as a significant intermediate. Specifically, enhanced rates of phosgene production are associated with the dissociative adsorption of BrCl (g) that indirectly increases the pool of Cl (ad) available for reaction.

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Section: Resultsmentioning

confidence: 99%

“…A similar situation was previously reported for chlorine. 5 Small quantities (<1 wt %) of Si, Al, and S are additionally observed; the origins of these signals are unknown.…”

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Phosgene Synthesis Catalysis: The Influence of Small Quantities of Bromine in the Chlorine Feedstream

Rossi

Winfield

Meyer

et al. 2021

Ind. Eng. Chem. Res.

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“…The gaseous reactants were pumped through the system using a peristaltic pump for 242 min. IR spectra were recorded 0, 3,6,9,12,15,19,22,25,28,39,40,100,161,221,282,342, 403, 363, and 524 min (fig. S23).…”

Section: General Description Of the Flow Setupmentioning

confidence: 99%

Novel synthetic pathway for the production of phosgene

et al. 2021

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Chloride ions are efficient catalysts for the synthesis of phosgene from carbon monoxide and elemental chlorine at room temperature and atmospheric pressure. Control experiments rule out a radical mechanism and highlight the role of triethylmethylammonium trichloride, [NEt 3 Me][Cl 3 ], as active species. In the catalytic reaction, commercially available [NEt 3 Me]Cl reacts with Cl 2 to form [NEt 3 Me][Cl 3 ], enabling the insertion of CO into an activated Cl─Cl bond with a calculated energy barrier of 56.9 to 77.6 kJ mol −1 . As [NEt 3 Me]Cl is also a useful chlorine storage medium, it could serve as a catalyst for phosgene production and as chlorine storage in a combined industrial process.

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Recent advances in processes and catalysts for glycerol carbonate production via direct and indirect use of CO2

Inrirai,

Keogh,

Centeno-Pedrazo

et al. 2024

Journal of CO2 Utilization

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Phosgene formation via carbon monoxide and dichlorine reaction over an activated carbon catalyst: Towards a reaction model

Cited by 6 publications

References 16 publications

Phosgene Synthesis Catalysis: The Influence of Small Quantities of Bromine in the Chlorine Feedstream

Phosgene Synthesis Catalysis: The Influence of Small Quantities of Bromine in the Chlorine Feedstream

Novel synthetic pathway for the production of phosgene

Recent advances in processes and catalysts for glycerol carbonate production via direct and indirect use of CO2

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