Gas Dehydration and Purification by Adsorption

Kohl, Arthur L.; Nielsen, Richard B.

doi:10.1016/b978-088415220-0/50012-4

Cited by 24 publications

(32 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CO 2 -scrubbing technologiesa re over 80 years old andw eref irst patented in the 1930s by Bottoms. [1] Such technologiesh ave been used in the oil and gas industries for decades [2] butare currently the focus of adaptation for coal-fired powerp lants. The majority of amine scrubbing technologiesa re formulations of CO 2 -reactive amines with water as ac arrierf luid.…”

Section: Introductionmentioning

confidence: 99%

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

et al. 2015

View full text Add to dashboard Cite

The kinetics of the absorption of CO2 into two nonaqueous CO2-binding organic liquid (CO2 BOL) solvents were measured at T=35, 45, and 55 °C with a wetted-wall column. Selected CO2 loadings were run with a so-called "first-generation" CO2 BOL, comprising an independent base and alcohol, and a "second-generation" CO2 BOL, in which the base and alcohol were conjoined. Liquid-film mass-transfer coefficient (k'g ) values for both solvents were measured to be comparable to values for monoethanolamine and piperazine aqueous solvents under a comparable driving force, in spite of far higher solution viscosities. An inverse temperature dependence of the k'g value was also observed, which suggests that the physical solubility of CO2 in organic liquids may be making CO2 mass transfer faster than expected. Aspen Plus software was used to model the kinetic data and compare the CO2 absorption behavior of nonaqueous solvents with that of aqueous solvent platforms. This work continues our development of the CO2 BOL solvents. Previous work established the thermodynamic properties related to CO2 capture. The present paper quantitatively studies the kinetics of CO2 capture and develops a rate-based model.

show abstract

Section: Introductionmentioning

confidence: 99%

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The main disadvantage is the loss of product gas due to regeneration of the adsorbent. Besides, commercially available adsorbents are sensitive to water present in the raw gas stream (Kohl and Nielsen, 1997) and, thus, an additional dewatering device is required.…”

Section: Introductionmentioning

confidence: 99%

A novel gas purification system for biologically produced gases

Beggel

Nowik

Modigell

et al. 2010

Journal of Cleaner Production

View full text Add to dashboard Cite

“…Among these processes, the most advanced processes include absorption into amine solutions, calcium looping, and absorption on novel sorbents. 1,2 Well-established technologies of random and structured packed absorption columns and a large knowledge of reactive absorption of CO 2 by amines or alkaline solvents 1,3 provide excellent conditions for the development of CO 2 capture technology. However, some issues limit the development of technologies based on amines or alkaline solvents.…”

Section: Introductionmentioning

confidence: 99%

“…Carbonic anhydrases (CAs; EC 4.2.1.1) are metalloenzymes that increase the CO 2 conversion rate into bicarbonates under a wide spectrum of operating conditions. The physiological role of this enzyme includes processes such as respiration, photosynthesis, pH regulation and homeostasis, CO 2 and HCO 3 − transport, several biosynthetic processes, production of body fluids, bone resorption, and other physiological processes, mostly investigated in plants and mammals. 6 The use of CA as an industrial biocatalyst is characterized by several advantages: CA is an environmentally friendly biocatalyst; the absorption can occur at low temperature (298-323K); it is consistent with K 2 CO 3 solutions; and different options for CO 2 use can be expected (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The behavior of the bulk liquid was assumed to be ideal: chemical equilibrium for all the dissociation reaction (Eqns (A14)-(A16)) electroneutrality Eqn (A17). According to the assumptions, the chemical composition of the carbonate solutions in terms of [CO 2 ], [HCO 3 − ], [CO 3 2− ], and [OH − ] was calculated from the Eqns (A14)-(A17) and the carbon balance in Eqn (A18) for solvents characterized by CTB = 0. Equation (A18) was substituted with Eqn (A19) for solvents characterized by CTB > 0.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Characterization of technical grade carbonic anhydrase as biocatalyst for CO₂ capture in potassium carbonate solutions

et al. 2017

View full text Add to dashboard Cite

Reactive absorption promoted by carbonic anhydrase (CA, E.C. 4.2.1.1.) catalysis has been proposed for CO2 capture from exhaust gas as an alternative to the reactive absorption in amine solutions. Potassium carbonate solutions allow feasible CO2 capture assisted by CA. This paper reports on the characterization of a CA form supplied by Novozymes as a catalyst for CO2 capture in K2CO3 solutions at operating conditions relevant for industrial processes (2–3 M K2CO3, 298–313 K, 0–40% carbonate to bicarbonate conversion). CO2 absorption tests were carried out in a batch‐stirred cell apparatus at constant gas volume and temperature by measuring gas pressure decay. The enhancement ratio between CO2 absorption rate with and without the enzyme at biocatalyst concentration above 0.3 kg m−3 ranged between 5 and 8 depending on the solvent composition and temperature. Active enzyme aggregates formed at protein concentration larger than 0.3 kg/m3 and their contribution to the absorption rate enhancement was remarkable. Assessment of enzyme kinetics in homogeneous solutions at enzyme concentration lower than 0.018 kg·m−3 showed that kcat/KM increased with both temperature and salt concentration. kcat/KM ranged between 9.0·103 and 7.0·104 m3·kg−1·s−1 in agreement with literature data on carbonic anhydrase kinetics. Reliability of the adopted method for kinetic characterization was confirmed. The activity of enzyme aggregates formed in the carbonate solvent was verified and CA aggregates can be used to select the proper CA based biocatalyst for CO2 capture application as an alternative to free and immobilized enzyme. © 2017 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

Gas Dehydration and Purification by Adsorption

Cited by 24 publications

References 22 publications

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

A novel gas purification system for biologically produced gases

Characterization of technical grade carbonic anhydrase as biocatalyst for CO₂ capture in potassium carbonate solutions

Contact Info

Product

Resources

About

Gas Dehydration and Purification by Adsorption

Cited by 24 publications

References 22 publications

Measuring the Absorption Rate of CO2 in Nonaqueous CO2‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

Measuring the Absorption Rate of CO2 in Nonaqueous CO2‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

A novel gas purification system for biologically produced gases

Characterization of technical grade carbonic anhydrase as biocatalyst for CO2 capture in potassium carbonate solutions

Contact Info

Product

Resources

About

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

Measuring the Absorption Rate of CO₂ in Nonaqueous CO₂‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

Characterization of technical grade carbonic anhydrase as biocatalyst for CO₂ capture in potassium carbonate solutions