Carbon dioxide absorption into promoted carbonate solutions

Tseng, P. C.; Ho, W.S. Winston; Savage, David

doi:10.1002/aic.690340604

Cited by 80 publications

(42 citation statements)

References 20 publications

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“…Thus, H 2 S can permeate through the membrane much faster than CO 2 , and H 2 S can be completely removed in the front section of the WGS membrane reactor. In the absorption of H 2 S and CO 2 into aqueous amine solutions, the H 2 S/CO 2 selectivity is about 3 [34][35][36][37][38][39][40]. Our initial membrane data (2 atm) in Figure 21 have also shown H 2 S with about 3 times permeability of CO 2 .…”

Section: H 2 S Transport Propertiesmentioning

confidence: 87%

Causes and Possible Solutions to the Middle East Terrorism

Al-Thagafi¹

2008

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The public reporting burden for this collection of information is estimated to average 1 hour par response, including the time for reviewing instructions, searching existing data sources, gathering and meintaining the date needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of informaton, including suggestions for reducing the burden, to Department of Defene, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondlents should be aware that notwithstanding eny other provision of law, no person shell be subject to any penalty for failing to comply with a collection of Information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY)2. REPORT TYPE 1 3. DATES COVERED (From -To) 30-11-2007 Final Technical Report Cooney, Michael J. 6t. WORK UNIT NUMBERLiaw, Bor Yann Masutani, Stephen M. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) S. PERFORMING ORGANIZATION University of Hawaii REPORT NUMBER2530 Dole Street, Sakamaki D200 Honolulu, HI 96822 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSOR/MONITOR'S ACRONYM(S)Office of Naval Research ONR Regional Office Seattle 1107 NE 45th Street, Suite 350 SPONSOR/MONITOR'S REPORTSeattle, WA 98105-4631 NUMBER(S) DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. SUPPLEMENTARY NOTESIn addition to the primary text of the Final Technical Report (106 pages), the report has three Appendices with 80 pages total. ABSTRACTThis report covers efforts by the Hawaii Natural Energy Institute of the University of Hawaii under the ONR-funded HEET Initiative that addresses critical technology needs for exploration/utilization of seabed methane hydrates and development/testing of advanced fuel cells and fuel cell systems. Methane hydrates work included: laboratory and analytical investigations of hydrate destabilization phenomena; characterization of the microbial community in marine hydrate beds; development of models to predict the fate of methane released from the seafloor into the water column; and the promotion of international R&D partnerships. In the fuel cell area, accomplishments included: addition of two fuel cell test cells to the Hawaii Fuel Cell Test Facility; improved capabilities for fuel/oxodizer impurity testing; and improved performance of the dynamic HiL test stand. Under the hydrogen production area, efforts were focused on sulfur removal from fuel gas and construction of a reformer system for seafloor methane work. Further work was also carried out with novel fuel cell concepts including biocarbons and bio-fuel cells. SUBJECT TERMS Executive SummaryThis report summarizes work conducted under Grant Number N00014-06-1-0086, the Hawaii Energy and Environmental Technologies (HEET) Initiative, funded through the Office of...

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Section: H 2 S Transport Propertiesmentioning

confidence: 87%

Causes and Possible Solutions to the Middle East Terrorism

Al-Thagafi¹

2008

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“…Several research groups have investigated new alkanolamines activators for CO 2 absorption into potassium carbonate solutions (Bińczak et al, 2013;Cullinane and Rochelle, 2004;Kim et al, 2012;Pohorecki et al 1988;Tseng et al, 1988;Yih and Sun, 1987).…”

Section: Introductionmentioning

confidence: 99%

Investigations of carbon dioxide absorption into aqueous potassium carbonate solutions containing primary and secondary alkanolamines

Bińczak¹,

Moniuk²,

Mordecka³

et al. 2016

Chemical and Process Engineering

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In the paper the results of measurements of CO 2 absorption rate in aqueous potassium carbonate solutions containing cyclohexylamine, diethanolamine, 2-methylaminoethanol and triethylenetetramine as activators have been presented. Enhnancement mass transfer factors as well as reaction rate constants have been determined. Results show that among the tested activators triethylenetetramine and 2-methyl-aminoethanol may be used (instead of diethanolamine) as new promotors in a modified BENFLIELD process.

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“…One of the most important advantages is that the absorption can occur at high temperatures, making regeneration process more efficient and economical [8]. The biggest challenge associated with using K 2 CO 3 as a solvent is that it has a low rate of reaction, resulting in poor CO 2 mass transfer [9][10][11][12][13], thus promoters were often added to the solvent to improve the CO 2 mass-transfer rates.…”

Section: Introductionmentioning

confidence: 99%

Absorption Rate of CO2 in DEA Promoted K2CO3 Solution at High Temperatures

Qin¹,

Xie²,

Fu³

2016

Proceedings of the 2016 International Conference on Civil, Transportation and Environment

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Abstract. The absorption rates of CO 2 in diethanolamine (DEA) promoted potassium carbonate (K 2 CO 3 ) solution at normal pressure with temperature ranging from 343.2K to 363.2K were investigated. The mass fractions of DEA and K 2 CO 3 respectively ranged from 0 to 0.02, and 0.35 to 0.40. The results revealed the effects of DEA concentration and temperatures on the absorption rate of CO 2 . IntroductionThe utilization of grand amount of fossil fuel causes large emission of CO 2 concentration in the atmosphere, which has destructively affected global climate through the so-called "greenhouse effect" [1][2][3]. Carbon capture and storage (CCS) is one of promising routes to reduce CO 2 emissions from fossil fuel-fired power plants [4].Over the past years, numerous methods have been proposed for post-combustion CO 2 capture [5][6][7]. Some of the commercially used methods are chemical absorption, physical absorption and membrane separation. Potassium carbonate(K 2 CO 3 ) and amines like monoethanolamine (MEA), diethanolamine(DEA) and N-methyldiethanolamine(MDEA), can remove acid gas constituents from sour gas streams for a large-scale implementation. K 2 CO 3 has a number of advantages over the amine-based solvents, including low cost, low toxicity, characteristic of refractory, and so on. One of the most important advantages is that the absorption can occur at high temperatures, making regeneration process more efficient and economical [8]. The biggest challenge associated with using K 2 CO 3 as a solvent is that it has a low rate of reaction, resulting in poor CO 2 mass transfer[9-13], thus promoters were often added to the solvent to improve the CO 2 mass-transfer rates.The concept of the addition of amine to carbonate system to enhance CO 2 absorption has been known for a long time [14,15]. The hot potassium carbonate process, also known as the Benfiled process, has been used commercially for treating acid gas streams for many years [16][17][18]. It has been well known that small amount of certain organic or inorganic additives can enhance the absorption rate significantly [19]. Moreover, due to its thermal stability, K 2 CO 3 is able to serve as absorbent at high temperatures. The solubilities of both K 2 CO 3 and potassium bicarbonate (KHCO 3 ) get much higher at high temperatures, which enables the use of high concentrated K 2 CO 3 aqueous solution as absorbent. Compared with the Benfield process, the absorption process using high concentrated K 2 CO 3 aqueous solutions at high temperatures is expected to achieve larger absorption amount of CO 2 and higher reaction rate [20,21] and reduce the pre-cooling energy requirements [22]. However, the absorption rate of CO 2 in DEA-K 2 CO 3 solution at high temperatures have not been well documented so far.The main purpose of this work is to determine an appropriate addition of DEA to high concentrated K 2 CO 3 aqueous solution at high temperatures, so that the high absorption rate can be achieved. To this end, the absorption rate of CO 2 in series of DEA-K 2 CO 3 aq...

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Carbon dioxide absorption into promoted carbonate solutions

Cited by 80 publications

References 20 publications

Causes and Possible Solutions to the Middle East Terrorism

Causes and Possible Solutions to the Middle East Terrorism

Investigations of carbon dioxide absorption into aqueous potassium carbonate solutions containing primary and secondary alkanolamines

Absorption Rate of CO2 in DEA Promoted K2CO3 Solution at High Temperatures

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