Amine tethered pore-expanded MCM-41 for CO2 capture: Experimental, isotherm and kinetic modeling studies

Loganathan, Sravanthi; Tikmani, Mayur; Mishra, Aakanksha; Ghoshal, Aloke Kumar

doi:10.1016/j.cej.2016.05.106

Cited by 65 publications

(21 citation statements)

References 59 publications

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“…Textural properties parameters of before and after amines modified HPS are summarized in Table 1. And the same structure parameter of some order mesoporous materials was also list for comparison in Table 2 [41][42][43].…”

Section: Characterization Of Hps and Hps-tepamentioning

confidence: 99%

“…Therefore, the HPS with different pore distribution not only provide a great surface area but a large pore volume. When the HPS was utilized to load the organic amine for CO 2 capture, it is not easy to cause channel blockage and the amount of TEPA can be improved effectively [41][42][43]. By observing the average pore size, an interesting phenomenon is found that with the increase of TEPA loaded capacity, the average pore diameter increases.…”

Section: Characterization Of Hps and Hps-tepamentioning

confidence: 99%

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Development of amine-functionalized hierarchically porous silica for CO2 capture

Zhang

Zhao

2017

Journal of Industrial and Engineering Chemistry

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A kind of hierarchical porous silica (HPS) was synthesized in a relatively mild condition and then devoted as the supports to fabricate TEPA-impregnated adsorbents for CO 2 adsorption. HPS has different pore size distribution and the huge pore volume. These structure characteristics of HPS can mitigate the mass transfer resistance which occurs more serious in traditional carrier materials with single smaller channel. The CO 2 adsorption performances of modified HPS were investigated in a homemade fixed bed reactor under different conditions. The HPS exhibited maximum CO 2 adsorption capacities of 5.01 mmol/g when 60 wt.% TEPA loaded. It presented better TEPA loading properties and higher CO 2 adsorption capacities than the majority of the single ordered mesoporous adsorbents according to the literature. When the adsorption experiments were repeated ten times, the amount of CO 2 capture reduces from 5.01 mmol/g to 4.7 mmol/g, only 6.1% reduction. And the deactivation model which can describe the absorption of CO 2 was adopted under different experiment conditions. In all these cases, the experimental data of CO 2 adsorption gave a good agreement with the predicted results by the breakthrough model.

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Section: Characterization Of Hps and Hps-tepamentioning

confidence: 99%

Section: Characterization Of Hps and Hps-tepamentioning

confidence: 99%

Development of amine-functionalized hierarchically porous silica for CO2 capture

Zhang

Zhao

2017

Journal of Industrial and Engineering Chemistry

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“…16,17 Among the candidate sorbent materials, immobilized amines possess many desirable CO 2 adsorptive properties that may not be easily obtained with other sorbent materials, such as their extremely high CO 2 selectivity, fast adsorption kinetics and high adsorption capacity especially at very low CO 2 partial pressures, great moisture tolerance and favourable operating temperature window of 50-80 C that minimizes or essentially eliminates the cooling need of typical ue gas streams from power plants. [18][19][20][21][22][23] The CO 2 adsorption of immobilised amine adsorbents follows similar reaction mechanisms to those in the aqueous amine absorption process, which involves the reversible formation of ammonium carbamate under anhydrous ue gas conditions and ammonium bicarbonate under wet conditions. Two typical preparation methodologies are used, namely surface graing and direct impregnation.…”

Section: Introductionmentioning

confidence: 97%

Synthesis and functionalisation of spherical meso-, hybrid meso/macro- and macro-porous cellular silica foam materials with regulated pore sizes for CO₂ capture

et al. 2018

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“…Therefore, mitigation of CO 2 emissions has attracted intensive research efforts to develop more efficient, cost‐effective alternatives than the current benchmark amine scrubbing capture technology. Among the various processes investigated, including absorption, membrane technologies, adsorption, and chemical looping, adsorption appears to be a promising, low‐cost approach for scaling up CO 2 capture process . A variety of solid adsorbents and process configurations have been evaluated for adsorptive CO 2 capture; however despite outstanding performance, a viable industrial‐scale adsorption‐based CO 2 capture process has yet to be commercialized.…”

Section: Introductionmentioning

confidence: 99%

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

Brennan

Thakkar

et al. 2016

Energy Tech

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In this study, 3‐aminopropyltrimethoxysilane (APS) was used as a grafting agent in three solvents with different polarities for post‐functionalization of a ZrO2–TiO2–SiO2/poly(amide‐imide) composite hollow fiber sorbent (Zr–Ti–Si/PAI‐HF) at ambient temperature. The same fiber at two different states: (i) wet (as‐spun) and (ii) dry were used for amine grafting. The influence of the polarity/nature of various solvents such as acetone, ethanol, and toluene on the CO2 sorption characteristics of wet and dry Zr–Ti–Si/PAI‐HF fibers was investigated accordingly. Several parameters such as grafting time (1–4 h), amine concentration (10–50 wt %), and solvent type (acetone, ethanol, and toluene) were systematically varied. The CO2 sorption capacity and breakthrough tests were performed under simulated flue gas conditions for grafted fiber composites. Our results indicate that the CO2 sorption capacity of amine‐grafted Zr–Ti–Si/PAI‐HF strongly depends on both the type of solvent and the state of the fibers (i.e., dryness or wetness). The APS grafting of wet fibers performed in toluene led to high amine loading and CO2 capacity (1.40 mmol g−1), whereas dry fibers gave rise to a relatively low CO2 capacity (0.90 mmol g−1). In contrast, dry fibers functionalized in either acetone or ethanol exhibited higher CO2 capacity compared to the wet fibers prepared in the same solvent. By using ethanol as a solvent, the solvolysis of the Si−O−Si linkages is much faster than the competitive condensation reaction between the silanol groups (Si−OH) of APS moieties and hydroxyl group (OH) of the ethanol, which leads to the lower siloxane formation. In the case of acetone, a dense polymeric network is formed under condensation reaction between an acetone molecule and the amine moieties, thus reducing the amount of primary amine groups available for interacting with the CO2 molecules.

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Amine tethered pore-expanded MCM-41 for CO2 capture: Experimental, isotherm and kinetic modeling studies

Cited by 65 publications

References 59 publications

Development of amine-functionalized hierarchically porous silica for CO2 capture

Development of amine-functionalized hierarchically porous silica for CO2 capture

Synthesis and functionalisation of spherical meso-, hybrid meso/macro- and macro-porous cellular silica foam materials with regulated pore sizes for CO₂ capture

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

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Amine tethered pore-expanded MCM-41 for CO2 capture: Experimental, isotherm and kinetic modeling studies

Cited by 65 publications

References 59 publications

Development of amine-functionalized hierarchically porous silica for CO2 capture

Development of amine-functionalized hierarchically porous silica for CO2 capture

Synthesis and functionalisation of spherical meso-, hybrid meso/macro- and macro-porous cellular silica foam materials with regulated pore sizes for CO2 capture

Effect of Post‐Functionalization Conditions on the Carbon Dioxide Adsorption Properties of Aminosilane‐Grafted Zirconia/Titania/Silica‐Poly(amide‐imide) Composite Hollow Fiber Sorbents

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Synthesis and functionalisation of spherical meso-, hybrid meso/macro- and macro-porous cellular silica foam materials with regulated pore sizes for CO₂ capture