Improved immobilized carbon dioxide capture sorbents

Gray, McMahan L.; Soong, Yee; Champagne, Kenneth J; Pennline, Henry W.; Baltrus, John P.; Stevens, Robert W.; Khatri, Rajesh; Chuang, Steven S. C.; Filburn, Thomas

doi:10.1016/j.fuproc.2005.01.005

Cited by 241 publications

(177 citation statements)

References 10 publications

Supporting

Mentioning

172

Contrasting

Unclassified

Order By: Relevance

“…Similarly significant internal hydrogen bonding effects on carbamate formation energetics have been noted previously. [23] Carbonyl functionalities introduce additional conformational effects on the carbamate reaction. Reactions of the amides CH 3 C(O)NH 2 and CH 3 CH 2 C(O)NH 2 with CO 2 are 12 kcal mol À1 more exothermic than that of NH 3 .…”

Section: Resultsmentioning

confidence: 99%

“…[10] Technologies include supported liquid membranes of aqueous amine solutions, [19,20] amine-functionalized silica, [21,22] and amine enriched solid sorbents. [23] A hybrid Substituted amines are a popular choice as molecules to selectively react with and separate CO 2 from gas mixtures. Such separations are of particular interest, for example, for CO 2 separations for carbon capture and sequestration.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Computational Comparison of the Reactions of Substituted Amines with CO₂

Mindrup

Schneider

2010

ChemSusChem

View full text Add to dashboard Cite

Substituted amines are a popular choice as molecules to selectively react with and separate CO2 from gas mixtures. Such separations are of particular interest, for example, for CO2 separations for carbon capture and sequestration. It is desirable to tune amine–CO2 reaction energies to suit a particular separation. Herein, we use DFT‐B3LYP simulations to characterize the products and energetics of reactions of CO2 with a range of substituted amines, considering both 1:1 and 2:1 amine/CO2 reaction stoichiometries. The results show that by adjusting both the nature and the placement of functional groups, it is possible to tune reaction energies over a substantial range. Decomposition of the 2:1 reaction into separate carbamate and ammonium formation steps shows that the Brønsted basicity and Lewis basicity towards CO2 are largely uncorrelated and provide an independent means of tuning the overall reaction energies.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computational Comparison of the Reactions of Substituted Amines with CO₂

Mindrup

Schneider

2010

ChemSusChem

View full text Add to dashboard Cite

show abstract

“…These sorbents include carbon [16] and silica [17] based sorbents and zeolites [16]. The sorbents are typically activated (by heat) or functionalized with amines to increase carbon dioxide selectivity.…”

Section: Solid Sorbentsmentioning

confidence: 99%

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

Stechel¹,

Brady²,

Staiger³

et al. 2010

View full text Add to dashboard Cite

Effective capture of atmospheric carbon is a key bottleneck preventing non bio-based, carbon-neutral production of synthetic liquid hydrocarbon fuels using CO 2 as the carbon feedstock. Here we outline the boundary conditions of atmospheric carbon capture for recycle to liquid hydrocarbon fuels production and re-use options and we also identify the technical advances that must be made for such a process to become technically and commercially viable at scale. While conversion of atmospheric CO 2 into a pure feedstock for hydrocarbon fuels synthesis is presently feasible at the bench-scale -albeit at high cost energetically and economically-the methods and materials needed to concentrate large amounts of CO 2 at low cost and high efficiency remain technically immature. Industrial-scale capture must entail: (1) Processing of large volumes of air through an effective CO 2 capture media and (2) Efficient separation of CO 2 from the processed air flow into a pure stream of CO 2 . 4 ACKNOWLEDGMENTS

show abstract

“…8,27 A modificação de materiais mesoporosos com aminas pode se configurar em um processo útil para a remoção de CO 2 por causa da habilidade de algumas aminas em formar compostos como carbamato e carbonatos de amônio por meio de reações reversíveis sob temperaturas brandas. 28 As estruturas de fase hexagonal e cúbica aliadas com a presença de grupos seletivos ao CO 2 podem apresentar um efeito sinérgico no fenômeno de adsorção gás-sólido.…”

Section: Introductionunclassified

ADSORPTION OF CO₂ON MICRO AND MESOPOROUS MOLECULAR SIEVES

Oliveira¹,

Machado²,

Santos³

et al. 2014

Química Nova

View full text Add to dashboard Cite

ADSORPTION OF CO 2 ON MICRO AND MESOPOROUS MOLECULAR SIEVES. Microporous molecular sieves of type Y, Beta, ZSM-5, ZSM-12 and ZSM-35, and mesoporous molecular sieves of type MCM-41 and MCM-48, and these sieves modified with triethanolamine and ethylenediamine were obtained and characterized by XRD, FTIR, TGA and nitrogen adsorption. The adsorption tests were performed by the gravimetric method under a stream of CO 2 at ambient temperature and pressure. The adsorbents studied showed maximum adsorption capacity of carbon dioxide in the range of 13.1 to 85.5 mg of CO 2 per gram of adsorbent.Keywords: molecular sieve; adsorption; carbon dioxide. INTRODUÇÃOOs seres humanos sempre influenciaram o meio ambiente. Contudo, foi somente após o início da revolução industrial, concomitante ao crescimento populacional, que os impactos das atividades humanas se intensificaram com maior relevância.1 Em especial, ações antrópicas que produzem gases agentes do efeito estufa, a exemplo das acentuadas emissões de dióxido de carbono derivadas da queima de combustíveis fósseis, que modificam a composição atmosférica e o equilíbrio dinâmico existente entre este componente e a biosfera. 2Pesquisas têm demonstrado que o teor de CO 2 pode dobrar ainda neste século acarretando drásticas mudanças climáticas.2-4 O desafio atual é promover a mitigação dos impactos ambientais relacionados principalmente à produção de dióxido de carbono, já que este é considerado o maior contribuidor antropogênico para intensificação do aquecimento global. [3][4][5] Cerca de 70% de todas as emissões de CO 2 e 60% de todas as emissões de gases de efeito estufa estão relacionados com o uso e produção de diferentes formas de energia.2-6 A busca por fontes energéticas que minimizem essas emissões é de grande importância, como também o uso de ações complementares como processos para captura de gases causadores do efeito estufa das principais fontes emissoras.Dentre várias atividades que contribuem para liberação de CO 2 para o meio ambiente estão a queima de combustíveis fósseis, como o carvão, o gás natural ou petróleo, e processos industriais, tais como usinas de energia, de refino de petróleo e de produção de cimento, ferro e aço. 3,5,6 Neste cenário, o combate às emissões de CO 2 proveniente de atividades do setor energético, como o tratamento de correntes gasosas, têm se intensificado nos últimos anos. Dentre os processos disponíveis para captura de CO 2 , destaca-se a absorção química com aminas líquidas, 3-5 a qual apresenta algumas desvantagens por ser dispendiosa e gerar rejeitos na sua recuperação. O uso da adsorção gás-sólido seletiva de CO 2 tem muitas vantagens sobre a absorção com aminas líquidas, tais como fácil manipulação sem riscos ao ambiente e recuperação do material adsorvente, podendo-se utilizar plantas industriais mais otimizadas. 3,7-10A busca por adsorventes que sejam competitivos para captura de CO 2 tem levado vários grupos de pesquisa a projetar materiais dos mais variados tipos, tanto para aplicações em que ocorre o fenômeno de adsorção...

show abstract

Improved immobilized carbon dioxide capture sorbents

Cited by 241 publications

References 10 publications

Computational Comparison of the Reactions of Substituted Amines with CO₂

Computational Comparison of the Reactions of Substituted Amines with CO₂

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

ADSORPTION OF CO₂ON MICRO AND MESOPOROUS MOLECULAR SIEVES

Contact Info

Product

Resources

About

Improved immobilized carbon dioxide capture sorbents

Cited by 241 publications

References 10 publications

Computational Comparison of the Reactions of Substituted Amines with CO2

Computational Comparison of the Reactions of Substituted Amines with CO2

Thermokinetic/mass-transfer analysis of carbon capture for reuse/sequestration.

ADSORPTION OF CO2ON MICRO AND MESOPOROUS MOLECULAR SIEVES

Contact Info

Product

Resources

About

Computational Comparison of the Reactions of Substituted Amines with CO₂

Computational Comparison of the Reactions of Substituted Amines with CO₂

ADSORPTION OF CO₂ON MICRO AND MESOPOROUS MOLECULAR SIEVES