Adsorption of Carbon Dioxide onto Hydrotalcite-like Compounds (HTlcs) at High Temperatures

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

doi:10.1021/ie000238w

Cited by 276 publications

(191 citation statements)

References 17 publications

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“…Among these, solid adsorbents have been commonly fit for the integrated gasification combined cycles (IGCC) related pre-combustion CO 2 capture processes [4,5], e.g., sorption enhanced water gas shift (SEWGS) and sorption enhanced biomass reforming (SEBR) reactions [12][13][14][15]. Among the abundant solid adsorbents which tend to capture CO 2 at moderate temperatures [5,[14][15][16], layered double hydroxides (LDHs) derived metal oxides [17][18][19][20][21] and magnesium oxide (MgO) based compounds [22][23][24][25][26] are promising for the SEWGS and SEBR technologies in the temperature range of 200-400 • C [10,[27][28][29][30]. LDHs have the reputation of outstanding thermal stability and relatively fast CO 2 adsorption kinetics.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

et al. 2017

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Abstract:In this work, we report on a novel sodium dodecyl sulfate (SDS)-assisted magnesium oxide (MgO)-based porous adsorbent synthesized by hydrothermal method for intermediate CO 2 capture. For industrial MgO, its CO 2 adsorption capacity is normally less than 0.06 mmol g −1 , with a specific surface area as low as 25.1 m 2 g −1 . Herein, leaf-like MgO nanosheets which exhibited a disordered layer structure were fabricated by the introduction of SDS surfactants and the control of other synthesis parameters. This leaf-like MgO adsorbent showed an excellent CO 2 capacity of 0.96 mmol g −1 at moderate temperatures (~300 • C), which is more than ten times higher than that of the commercial light MgO. This novel mesoporous MgO adsorbent also exhibited high stability during multiple CO 2 adsorption/desorption cycles. The excellent CO 2 capturing performance was believed to be related to its high specific surface area of 321.3 m 2 g −1 and abundant surface active adsorption sites. This work suggested a new synthesis scheme for MgO based CO 2 adsorbents at intermediate temperatures, providing a competitive candidate for capturing CO 2 from certain sorption enhanced hydrogen production processes.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

et al. 2017

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“…In the above formula, typically 0.2 e x e 0.33, but LDH with significantly higher x values have also been reported. 4 The most frequently studied LDH is [Mg 1-x Since these materials have a well-defined layered structure with nanometer (0.3-3 nm) interlayer distances and contain important functional groups, they are widely investigated for use as adsorbents for liquid ions [5][6][7] and gas molecules 8,9 and as catalysts for oxidation, [10][11][12] reduction, 13 and other catalytic reactions. [14][15][16] Recently, LDH materials have also been investigated in novel reactive separation processes to increase the conversion of catalytic reactions by removing one of the products from the reactor.…”

Section: Introductionmentioning

confidence: 99%

Thermal Evolution of the Structure of a Mg−Al−CO₃ Layered Double Hydroxide: Sorption Reversibility Aspects

Kim

Yang

Liu

et al. 2004

Ind. Eng. Chem. Res.

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In our prior study, we employed several in-situ techniques to investigate the thermal evolution of the structure of a Mg-Al-CO 3 layered double hydroxide (LDH) under an inert atmosphere and proposed a model to describe the structural evolution of the Mg-Al-CO 3 LDH structure. In this paper we present results of our ongoing investigations with these materials pertaining to their sorption characteristics and thermal reversibility under both inert and reactive atmospheres. The experimental observations are shown to be consistent with the structural model for the LDH previously proposed. The structure, sorption characteristics, and thermal reversibility of these materials are of importance in their use for the preparation of CO 2 -permselective membranes for high-temperature membrane reactor applications.

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“…Several researchers [103,[105][106][107][108][109][110][111][112] have investigated CO 2 adsorption on HTs and mixed oxides, but to our knowledge, no HT/mixed oxide membrane studies have been reported. Yong et al [110] have investigated the adsorption of CO 2 onto HT-like compounds at elevated temperatures.…”

Section: Hydrotalcite Membranesmentioning

confidence: 99%

“…Yong et al [110] have investigated the adsorption of CO 2 onto HT-like compounds at elevated temperatures. They observed that the CO 2 adsorption capacity of all HTs higher than 0.30 mmol/g and up to 0.5 mol/kg at 300 °C and 1 bar.…”

Section: Hydrotalcite Membranesmentioning

confidence: 99%

A Review of Carbon Dioxide Selective Membranes: A Topical Report

Shekhawat¹,

Luebke²,

Pennline³

2003

101

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The atmospheric concentration of anthropogenic carbon dioxide (CO 2 ) has been increasing since the start of industrialization in the mid 19th century, and the rate is increasing. It is highly unlikely that fossil fuel combustion, the main contributor to anthropogenic CO 2 , will be replaced in the foreseeable future. Therefore, CO 2 capture and storage offer a new set of options for reducing greenhouse gas emissions, in addition to the current strategies of improving energy efficiency and increasing the use of renewable energy resources. Carbon dioxide selective membranes provide a viable energy-saving alternative for CO 2 separation, since membranes do not require any phase transformation. This review examines various CO 2 selective membranes for the separation of CO 2 and N 2 , CO 2 and CH 4 , and CO 2 and H 2 from flue or fuel gas. This review attempts to summarize recent significant advances reported in the literature about various CO 2 selective membranes, their stability, the effect of different parameters on the performance of the membrane, the structure and permeation properties relationships, and the transport mechanism applied in different CO 2 selective membranes. Finally, the future direction for CO 2 selective membranes is proposed. Hybrid organic-inorganic membranes have become an expanding field of research, as the introduction of organic molecules can improve the characteristics of a matrix. Hydrotalcite-type materials, perovskite-type oxides, lithium zirconate, and lithium silicate are also suggested as candidate materials for high temperature CO 2 selective membranes.

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Adsorption of Carbon Dioxide onto Hydrotalcite-like Compounds (HTlcs) at High Temperatures

Cited by 276 publications

References 17 publications

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

Thermal Evolution of the Structure of a Mg−Al−CO₃ Layered Double Hydroxide: Sorption Reversibility Aspects

A Review of Carbon Dioxide Selective Membranes: A Topical Report

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Adsorption of Carbon Dioxide onto Hydrotalcite-like Compounds (HTlcs) at High Temperatures

Cited by 276 publications

References 17 publications

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

Hydrothermal Fabrication of High Specific Surface Area Mesoporous MgO with Excellent CO2 Adsorption Potential at Intermediate Temperatures

Thermal Evolution of the Structure of a Mg−Al−CO3 Layered Double Hydroxide: Sorption Reversibility Aspects

A Review of Carbon Dioxide Selective Membranes: A Topical Report

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Thermal Evolution of the Structure of a Mg−Al−CO₃ Layered Double Hydroxide: Sorption Reversibility Aspects