Mechanisms of adsorption of CO2 in the micropores of activated anthracite

Martín-Martínez, J.M.; Torregrosa-Maciá, Rosa; Mittelmeijer‐Hazeleger, Marjo C.

doi:10.1016/0016-2361(94)p4340-8

Cited by 61 publications

(36 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

Section: Carbon General Informationsupporting

confidence: 69%

“…Such a theory has been verified by some authors via the linear relationship between the measured CO 2 adsorption capacities and the volumes of pores with different sizes as illustrated in This enabled conclusions to be drawn that at atmospheric pressure, high-density CO 2 filled the pores smaller than 1 nm, upon increasing pressure, larger pores are filled (up to about 4 nm at 10 bar; Hu et al, 2011). Similar conclusions have also been achieved by using Grand Canonical Monte Carlo simulation and Non-Local Density Functional Theory (NLDFT) (Martin-Martinez et al, 1995;Cazorla-Amoros et al, 1996;Vishnyakov et al, 1999;Wei et al, 2012).Merits for carbon adsorbents include low cost, fast kinetics (equilibrium adsorption can be achieved within less than 10 min), ultra-high stability, easy-to-regenerate, hydrophobicity, and most importantly, high adsorption capacities at elevated (partial) pressures, these features make them well suited to IGCC applications Shafeeyan et al, 2010). Their main disadvantage currently is the low capacities at low (partial) pressures due to the inert surface chemistry.…”

supporting

confidence: 68%

See 1 more Smart Citation

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

et al. 2015

View full text Add to dashboard Cite

CO 2 capture represents the key technology for CO 2 reduction within the framework of CO 2 capture, utilization, and storage (CCUS). In fact, the implementation of CO 2 capture extends far beyond CCUS since it will link the CO 2 emission and recycling sectors, and when renewables are used to provide necessary energy input, CO 2 capture would enable a profitable zero-or even negative-emitting and integrated energy-chemical solution. To this end, highly efficient CO 2 capture technologies are needed, and adsorption using solid adsorbents has the potential to be one of the ideal options. Currently, the greatest challenge in this area is the development of adsorbents with high performance that balances a range of optimization-needed factors, those including costs, efficiency, and engineering feasibility. In this review, recent advances on the development of carbon-based and immobilized organic amines-based CO 2 adsorbents are summarized, the selection of these particular categories of materials is because they are among the most developed low-temperature (<100°C) CO 2 adsorbents up to date, which showed important potential for practical deployment at pilot-scale in the near future. Preparation protocols, adsorption behaviors as well as pros and cons of each type of the adsorbents are presented, it was concluded that encouraging results have been achieved already, however, the development of more effective adsorbents for CO 2 capture remains challenging and further innovations in the design and synthesis of adsorbents are needed.Keywords: CCUS, CO 2 capture, adsorption, energy, material science INTRODUCTION CO 2 CAPTURE AND AN INTEGRATED ENERGY-CHEMICAL SOLUTIONThe atmospheric CO 2 concentration now exceeds 400 ppm (CO2Now.org, 2014), and its continuous increase is believed to be the major factor leading to global warming and climatic change (Crowley, 2000;Held and Soden, 2000;Patz et al., 2005). Kaya et al. and Hoffert et al. have quantified net CO 2 emissions in terms of population, economic activity, and energy-related factors using Eq. 1 (Kaya, 1995;Hoffert et al., 1998).where C is the net CO 2 emission, P is population, GDP is the gross domestic product that is used here as an indicator of economyrelated factor, and E is energy production. Therefore, GDP/P is the Per capita GDP, and E/GDP can be regarded as the energy intensity during production that is closely related to the efficiency of energy utilization. The last term, C/E, represents the carbon intensity during energy production. As for the development of the human society and life quality, it is improper to limit population and production, which means there is no solution to CO 2 reduction from the first and second term in Eq. 1. On the other hand, increase in the energy production/utilization efficiency and control of the carbon footprint during energy processes are the major strategies for CO 2 sequestration (third and fourth term in Eq. 1). The complete decarbonization of energy is believed to be the ultimate solution for the long-term sustainability, ...

show abstract

Section: Carbon General Informationsupporting

confidence: 69%

supporting

confidence: 68%

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The micropore size distribution and micropore volume of the samples were calculated using the NLDFT method as shown in Table S1 and Figure S9. The molecular size of CO 2 is 0.209 nm, therefore only pores less than 1 nm are effective for efficient CO 2 adsorption at atmospheric pressure [45][46][47]. In contrast at higher pressures CO 2 is adsorbed in the supermicroporosity range (pore sizes between 0.7 and 2 nm).…”

Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

Highly selective CO2 capture by S-doped microporous carbon materials

Seema

Kemp

et al. 2014

Carbon

238

161

View full text Add to dashboard Cite

“…Martinez et al [16] studied the adsorption mechanism of CO2 on activated anthracite and found that the adsorption was a pore-filling process in narrow micropores. Adsorption in wide pores dominated throughout surface adsorption.…”

Section: Introductionmentioning

confidence: 99%

Desorption Kinetics and Mechanisms of CO2 on Amine-Based Mesoporous Silica Materials

Teng

Liu

et al. 2017

Energies

View full text Add to dashboard Cite

Tetraethylenepentamine (TEPA)-based mesoporous MCM-41 is used as the adsorbent to determine the CO 2 desorption kinetics of amine-modified materials after adsorption. The experimental data of CO 2 desorption as a function of time are derived by zero-length column at different temperatures (35, 50, and 70 • C) and analyzed by Avrami's fractional-order kinetic model. A new method is used to distinguish the physical desorption and chemical desorption performance of surface-modified mesoporous MCM-41. The activation energy E a of CO 2 physical desorption and chemical desorption calculated from Arrhenius equation are 15.86 kJ/mol and 57.15 kJ/mol, respectively. Furthermore, intraparticle diffusion and Boyd's film models are selected to investigate the mechanism of CO 2 desorption from MCM-41 and surface-modified MCM-41. For MCM-41, there are three rate-limiting steps during the desorption process. Film diffusion is more prominent for the CO 2 desorption rates at low temperatures, and pore diffusion mainly governs the rate-limiting process under higher temperatures. Besides the surface reaction, the desorption process contains four rate-limiting steps on surface-modified MCM-41.

show abstract

Mechanisms of adsorption of CO2 in the micropores of activated anthracite

Cited by 61 publications

References 11 publications

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

Highly selective CO2 capture by S-doped microporous carbon materials

Desorption Kinetics and Mechanisms of CO2 on Amine-Based Mesoporous Silica Materials

Contact Info

Product

Resources

About