Adsorption of Carbon Dioxide on Basic Alumina at High Temperatures

Zou, Yong; Mata, and Vera; Rodrigues, Alı́rio E.

doi:10.1021/je000075i

Cited by 91 publications

(75 citation statements)

References 6 publications

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“…Nevertheless such high breakthrough capacities complete very well the information gathered by the structural study reported herein and support the proposed pathway under relatively high pressure and temperature. In contrast, previous studies on CO 2 sorption on alkali-promoted alumina carried out at ordinary pressure [30] or relative high CO 2 pressure without steam [31] have revealed much lower CO 2 capacities. …”

Section: Resultsmentioning

confidence: 57%

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture

et al. 2010

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Alkali-promoted aluminas are inexpensive and robust materials with significant basicity that allow CO 2 uptake at relatively high temperature and pressure. In situ XRD experiments show that bulk crystalline carbonate K-Dawsonite [KAlCO 3 (OH) 2 ] phase is formed on such materials under relatively high pressure of an equimolar mixture of CO 2 and steam (total pressure of 10 bar) and at temperatures up to 300°C. In parallel, typical needle-shaped Dawsonite crystallites are observed by SEM after exposure to similar conditions. Furthermore, the in-situ experiments show that the car-

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Section: Resultsmentioning

confidence: 57%

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture

et al. 2010

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“…Although, basic alumina has a CO 2 capacity ranging from 0.39 to 0.62 mol/kg under the same conditions (Yong et al, 2000), HTlcs not only exhibit a higher CO 2 capacity at elevated temperatures, but they also tend to be H 2 O insensitive, which is not necessarily true for zeolites, activated carbons, and basic aluminas.…”

Section: Introductionmentioning

confidence: 98%

New Pressure Swing Adsorption Cycles for Carbon Dioxide Sequestration

2005

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A rigorous pressure swing adsorption (PSA) process simulator was used to study a new, high temperature PSA cycle, based on the use of a K -promoted HTlc adsorbent and a simple, 4-step, Skarstrom-type, vacuum swing cycle designed to process a typical stack gas effluent at 575 K containing (in vol%) 15% CO 2 , 75% N 2 and 10% H 2 O. The effects of the purge-to-feed ratio (γ ), cycle step time (t s ) (with all four steps of equal time), and pressure ratio (π T ) on the process performance was studied in terms of the CO 2 recovery (R) and enrichment (E) at a constant throughput θ of 14.4 L STP/hr/ kg. R increased with increasing γ and π T and decreasing t s , while E increased with increasing t s and π T and decreasing γ . The highest E of 3.9 was obtained at R = 87% and π T = 12, whereas at R = 100% the highest E of 2.6 was obtained at π T = 12. These results are very encouraging and show the potential of a high temperature PSA cycle for CO 2 capture.

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“…Various other CO 2 adsorbents include the following: K-promoted hydrotalcite, clay minerals like sepiolite and dolomite, modified double layer hydroxides, spinels with metal oxides, and mixed metal oxides of Mg, La, Ca, etc. [84][85][86][87][88] Yong et al 89 have recently reviewed the role of activated carbon, zeolites, metal oxides, hydrotalcite compounds, etc. as adsorbents and concluded that activated carbons and zeolites are superior to metal oxides and hydrotalcites for ambient temperature applications.…”

Section: Sorption Enhanced Steam Methane Reformingmentioning

confidence: 99%

“…79 There are several other works that report the use of alumina as a high temperature and pressure-reversible CO 2 adsorbent for use in a PSA cycle. 89,92 Lithium zirconate and CaO can also function as high temperature, CO 2 selective adsorbents and have temperature reversibility, [93][94][95][96] with reasonable regeneration rates. 97,98 Choice of suitable adsorbent is very important in the overall sorption enhanced steam methane reforming (SESMR) framework.…”

Section: Sorption Enhanced Steam Methane Reformingmentioning

confidence: 99%

Process intensification aspects for steam methane reforming: An overview

2009

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Steam methane reforming (SMR) is the most widely used process in industry for the production of hydrogen, which is considered as the future generation energy carrier. Having been perceived as an important source of H2, there are abundant incentives for design and development of SMR processes mainly through the consideration of process intensification and multiscale modeling; two areas which are considered as the main focus of the future generation chemical engineering to meet the global energy challenges. This article presents a comprehensive overview of the process integration aspects for SMR, especially the potential for multiscale modeling in this area. The intensification for SMR is achieved by coupling with adsorption and membrane separation technologies, etc., and using the concept of multifunctional reactors and catalysts to overcome the mass transfer, heat transfer, and thermodynamic limitations. In this article, the focus of existing and future research on these emerging areas has been drawn. © 2009 American Institute of Chemical Engineers AIChE J, 2009

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Adsorption of Carbon Dioxide on Basic Alumina at High Temperatures

Cited by 91 publications

References 6 publications

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture

New Pressure Swing Adsorption Cycles for Carbon Dioxide Sequestration

Process intensification aspects for steam methane reforming: An overview

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Adsorption of Carbon Dioxide on Basic Alumina at High Temperatures

Cited by 91 publications

References 6 publications

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO2 Capture

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO2 Capture

New Pressure Swing Adsorption Cycles for Carbon Dioxide Sequestration

Process intensification aspects for steam methane reforming: An overview

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Product

Resources

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In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture

In Situ XRD Detection of Reversible Dawsonite Formation on Alkali Promoted Alumina: A Cheap Sorbent for CO₂ Capture