Passive CO2 removal using a carbon fiber composite molecular sieve

Burchell, Timothy D; Judkins, R.R.

doi:10.1016/0196-8904(95)00282-0

Cited by 38 publications

(22 citation statements)

References 2 publications

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“…The pore volume (t-method) varies with the BET surface area, increasing with bum-of€. The observed variations in BET surface area and micropore volume and radius are in agreement with our previous data (Burchell and Judkins, 1996).…”

Section: Results and Discusslonsupporting

confidence: 81%

A novel carbon fiber based material and separation technology

Burchell

Judkins

1997

Energy Conversion and Management

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Our novel carbon fiber based adsorbent material shows preferential uptake of CO, over other gases. The material has a unique combination of properties, which include a large micropore volume, a large BET surfke area, and electrical conductivity. These properties have been exploited to effect the separation of CO, from a model gas (CH,). Enhanced desorption is achieved using an electrical current passed through the material at low voltage. The manufacture, characterization, and CO, adsorption behavior of the materials is reported here, along with our novel electrical swing separation technology. IUEYWORDSActivated carbon fibers, porous composites, gas separation, electrical swing adsorption.

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Section: Results and Discusslonsupporting

confidence: 81%

A novel carbon fiber based material and separation technology

Burchell

Judkins

1997

Energy Conversion and Management

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“…One of the explanations for this peculiar behavior is that the solid structure may contain molecular size constrictions, which lead to diffusion/transport limitations during the first adsorption run, but did not affect subsequent runs because of the widening of the pores and/or dissolution of some residual volatile compounds. It is known that CFCMS materials contain some amounts of phenolic resin (Burchell and Judkins, 1996). In fact, hysteretic CO 2 adsorption/desorption behavior has been reported for molecular sieve carbons derived from phenolic resin (Nakashima et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

“…In the third example we consider CO 2 adsorption on a sample of microporous carbon fiber composite molecular sieve (CFCMS) (Burchell and Judkins, 1996) (Fig. 3).…”

Section: Adsorption In Microporesmentioning

confidence: 99%

Diffusion-Controlled Hysteresis

Ravikovitch

Neimark

2005

Adsorption

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A new model of time-dependent sorption-desorption hysteresis is presented. This type of hysteresis is not related to transitions between metastable adsorption states, which are a common cause of capillary condensation hysteresis in mesoporous materials. We show that time-dependent hysteresis is a consequence of slow kinetics and failure to reach equilibrium at given experimental conditions. The model of diffusion-controlled hysteresis (DCH) we developed is capable of predicting time-dependent experimental data. It allows one to estimate the characteristic diffusion. We show that DCH model time and the equilibrium sorption isotherms from non-equilibrium sorption/desorption measurements. The DCH model has been tested using experimental CO 2 isotherms on polymeric and carbonaceous materials.

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“…[211,212] While all of these techniques have the attractive feature of limiting the amount of carbon dioxide emitted into the atmosphere, each has economic, technical or societal challenges. [213,214] A large-scale separation of carbon dioxide by absorption is a commercial operation used throughout the world. Other technologies to separate CO 2 include cryogenic separation, membrane separation and adsorption processes.…”

Section: Ht As Adsorbent Of Carbon Dioxidementioning

confidence: 99%

“…[226,231,232] The adsorption was considerably enhanced by impregnating HT with K 2 CO 3 . The level of adsorption depended on the amount of K 2 CO 3 used during HT preparation [213] . HT with 20 wt% K 2 CO 3 impregnation was found to yield the highest CO 2 adsorption of 0.77 mmol/g at 450…”

Section: Ht As Adsorbent Of Carbon Dioxidementioning

confidence: 99%

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

Othman

Helwani

Martunus

et al. 2009

Applied Organom Chemis

195

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In this paper, widely accepted methods of hydrotalcite preparation such as co-precipitation, urea hydrolysis, hydrothermal, sol-gel, microwave irradiation, steam activation and solvothermal have been selected and reviewed. Our review indicates that the nature of the divalent cations, the synthesis method, the calcination temperature and the nature of the interlayer species are determinant factors in shaping the surface properties of the layered double hydoxides. The basic strength of the surface base site and structural changes produced in the mixed oxides can be adjusted conveniently by varying the Al content during the synthesis. The combination of sol-gel with microwave irradiation during the gelling and crystallization steps has also been found to increase the surface area of the hydrotalcite-like compound.

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Passive CO2 removal using a carbon fiber composite molecular sieve

Cited by 38 publications

References 2 publications

A novel carbon fiber based material and separation technology

A novel carbon fiber based material and separation technology

Diffusion-Controlled Hysteresis

Synthetic hydrotalcites from different routes and their application as catalysts and gas adsorbents: a review

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