Absorption of Carbon Dioxide

Killeffer, D. H.

doi:10.1021/ie50335a021

Cited by 15 publications

(6 citation statements)

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“…In spite of its relatively high volatility and tendency to undergo reaction in alkaline solutions it might in certain circumstances find industrial applications. In an equimolal carbonate + bicarbonate solution at 20°C 1 % by weight of formaldehyde would be expected to increase the total rate of reaction of C02 eight-fold, an effect comparable to that obtainable with about 0.5 % by weight of As2O3, The effect of formaldehyde on the rate of absorption of carbon dioxide in alkaline solutions has already been noted by Riou and co-workers,38 Killeffer 39 and Fujikawa.40 In future work, attention will be directed towards higher specific reaction rates.…”

Section: Pklmentioning

confidence: 75%

Catalysis by Brönsted bases of the reaction between CO₂and water

Sharma

Danckwerts

1963

Trans. Faraday Soc.

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The catalysis of the reaction COz+H20 +HCOj+ H+ by a number of anions has been studied at 0°C. Anions which have a negatively-charged oxygen atom and at least one hydroxyl group attached to the same central atom, and in which the negative charge is not delocalized by resonance effects, form a single group which obeys the Bronsted relationship. Anions of other types are in general weaker catalysts for a given pK.

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Section: Pklmentioning

confidence: 75%

Catalysis by Brönsted bases of the reaction between CO₂and water

Sharma

Danckwerts

1963

Trans. Faraday Soc.

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“…Referring to earlier work by Riou andCartier (1927, 1928), Killeffer (1937) suggested that for COS absorption in sodium carbonate-bicarbonate solutions the effects of formaldehyde, methanol, phenol, soap, sodium lactate, and ethanolamines were attributable to surface tension depression. Referring to earlier work by Riou andCartier (1927, 1928), Killeffer (1937) suggested that for COS absorption in sodium carbonate-bicarbonate solutions the effects of formaldehyde, methanol, phenol, soap, sodium lactate, and ethanolamines were attributable to surface tension depression.…”

Section: Previous Workmentioning

confidence: 79%

Carbon Dioxide Absorption into Amine-Promoted Potash Solutions

Shrier¹,

Danckwerts²

1969

Ind. Eng. Chem. Fund.

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Examination of equilibrium and rate data on amine-potash systems in terms of an absorption-reaction scheme suggested that rates of C 0 2 absorption into potash solutions could be significantly increased by addition of small amounts of selected amine promoters. To demonstrate the predicted effect, a brief experimental study was carried out using a stirred absorption cell. Cell characteristics were determined for physical absorption (CO2-H20), and the degree of rate enhancement was measured for a number of amines with absorption of saturated C 0 2 at 1 atm. Additional experimental results for the most effective of the amines tested, 2-ethylaminoethanol (EAE), at 25" C. and saturated COS pressures of 1 atm. and 75 mm. of Hg were in reasonable agreement with the proposed mechanism. Additional work is recommended to evaluate amine promotion further as a technique for improving commercial COZ absorption processes involving potash solutions.

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“…The combination of amine and carbonate solution offers advantages for gas treating in terms of both efficiency and capacity. The addition of arnines and other additives to carbonate-bicarbonate buffers to enhance CO, absorption has been known for a long time (Killeffer, 1937). In 1960, Ellis studied CO, absorption rates in mixtures of potassium carbonate and monoethanolamine (MEA) and observed a significant rate-promotion effect.…”

Section: Rirn+hcoo-(zwitterion [ Z ) ) ( 5 )mentioning

confidence: 99%

Carbon dioxide absorption into promoted carbonate solutions

Tseng¹,

Ho²,

Savage³

1988

AIChE Journal

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CO, absorption rates into diethanolamine (DEA)-promoted carbonate solutions were measured over a wide range of carbonate conversions and temperatures. Analysis of the data showed that the C0,-DEA reaction rate was controlled by the rate of formation of zwitterion intermediate for carbonate conversions below 30%, and was controlled by the rate of abstraction of proton from the zwitterion intermediate for carbonate conversions greater than 30%. Hydroxyl ion, free amine, and carbonate ion were identified to act as bases to abstract the proton from the zwitterion. The modeling of the CO, absorption rates and the effects of carbonate conversion and amine concentration on the C0,-DEA reaction kinetics were investigated.

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Absorption of Carbon Dioxide

Cited by 15 publications

References 0 publications

Catalysis by Brönsted bases of the reaction between CO₂and water

Catalysis by Brönsted bases of the reaction between CO₂and water

Carbon Dioxide Absorption into Amine-Promoted Potash Solutions

Carbon dioxide absorption into promoted carbonate solutions

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Absorption of Carbon Dioxide

Cited by 15 publications

References 0 publications

Catalysis by Brönsted bases of the reaction between CO2and water

Catalysis by Brönsted bases of the reaction between CO2and water

Carbon Dioxide Absorption into Amine-Promoted Potash Solutions

Carbon dioxide absorption into promoted carbonate solutions

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Product

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Catalysis by Brönsted bases of the reaction between CO₂and water

Catalysis by Brönsted bases of the reaction between CO₂and water