Carbon dioxide–nitrogen separation through adsorption on activated carbon in a fixed bed

Dantas, Tirzhá Lins Porto; Luna, F. Murilo T.; Silva, Ivanildo J.; Azevedo, Diana C. S.; Grande, Carlos A.; Rodrigues, Alı́rio E.; Moreira, Regina de Fátima Peralta Muniz

doi:10.1016/j.cej.2010.08.026

Cited by 165 publications

(85 citation statements)

References 21 publications

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“…The These values are relatively high, especially for CO 2 , compared to the linear driving force parameters reported for commercial activated carbon Norit R 2030 CO2 [43]. In fact, a sensitivity analysis showed that increasing the mass transfer coefficient of CO 2 above 0.2 s -1 has no further effect on the shape of the simulated breakthrough curve for CO 2 .…”

Section: Fixed-bed Adsorption Experimentsmentioning

confidence: 83%

Sustainable biomass-based carbon adsorbents for post-combustion CO2 capture

González

Plaza

Rubiera

et al. 2013

Chemical Engineering Journal

222

128

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Sustainable carbon adsorbents have been produced from biomass residues by single-step activation with CO 2 . The activation conditions were optimised to develop narrow micropores in order to maximise the CO 2 adsorption capacity of the carbons under post-combustion conditions. The equilibrium of adsorption of pure CO 2 and N 2 was measured between 0 and 50 ˚C up to 120 kPa for the outstanding carbons. The CO 2 adsorption capacity measured at low pressures is among the highest ever reported for carbon materials (0.6-1.1 mmol g -1 at 15 kPa and 25-50 ˚C), and the average isosteric heat of adsorption is typical of a physisorption process: 27 kJ mol -1 . Dynamic experiments carried out in a fixed-bed adsorption unit showed fast adsorption and desorption kinetics and a high CO 2 -over-N 2 selectivity. These adsorbents are able to separate a mixture with 14 % CO 2 (balance N 2 ) at 50 ˚C, conditions that can be considered as representative of post-combustion conditions, and they can be easily regenerated.

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Section: Fixed-bed Adsorption Experimentsmentioning

confidence: 83%

Sustainable biomass-based carbon adsorbents for post-combustion CO2 capture

González

Plaza

Rubiera

et al. 2013

Chemical Engineering Journal

222

128

View full text Add to dashboard Cite

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“…Subsequent ramping released comparatively lesser proportion of CO 2 , with an average of 7.5% (between 300 and 400°C). This proportion could be attributed to those previously adsorbed by the coordinate covalent bonding provided by SNFs on the AC surface, whilst the average total of 10.35%, thermally eluted between 500 and 600°C, are ascribed to those held by a much stronger covalent bond with inorganic potassium species (Dantas et al, 2011).…”

Section: Thermal Programmed Desorption (Tpd) Test For Co 2 Adsorptionmentioning

confidence: 99%

“…This is attributed to the accumulation of the gas from anthropogenic sources, such as the flue gas from power plants (IPCC WG, 2005;Schrag, 2007;Dantas et al, 2011). In another case, CO 2 concentration is popularly used as an Indoor Air Quality (IAQ) indicator due to some health hazards (i.e., sick building syndrome (SBS)) popularly associated with exposure to its elevated levels in indoor spaces (Kulshreshtha et al, 2008;Lim et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Isotherm, Thermodynamic and Kinetic Studies of Selective CO2 Adsorption on Chemically Modified Carbon Surfaces

Adelodun

Ngila

Kim

et al. 2016

Aerosol Air Qual. Res.

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Detailed assessments of adsorption properties (isotherm, thermodynamics and kinetics) were carried out on chemically modified activated carbon (AC). Some pretreatment methods prior amination have been used to improve the CO 2 selective capture of AC in our previous works. Here, the inter-relationships among the adsorption properties were further investigated and reported. It was found that CO 2 molecules bind onto the heterogeneous surfaces of AC in a monolayer pattern as experimental data fit Freundlich isotherm rather than Langmuir. However, Redlich-Peterson, a 3-parameter model provided the best fit. The highest degree of precision of Chi-square analysis professed it as the most efficient error function for the isotherm study. Values of standard entropy showed to be the most significant thermodynamic limiting parameter in the adsorption process, as physisorption was found predominant for CO 2 collection at the interface. This observation was corroborated with temperature programmed desorption (TPD) analysis where ca. 86% of adsorbed CO 2 were desorbed below 500°C. The kinetic study indicated that CO 2 -AC interaction follows pseudo-second order while the higher R 2 of intraparticle diffusion over Elovich equation confirmed the deduction made from the thermodynamic study. Conclusively, the study of adsorption properties in this work provides useful information for designing proper adsorption reactor and subsequent regeneration of CO 2 -laden adsorbents at environmental levels.

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“…(17), (Amanullah, 2000;Dantas, 2011;Murillo, 2004;Tantet, 1995). As described in (Amanullah, 2000), the third term in Eq.…”

Section: Estimation Of Surface Diffusivitymentioning

confidence: 99%

“…Mathematical description of breakthrough curves for dynamic adsorption is important for filtration facilities design and can be used for describing adsorption kinetics on heterogeneous solids, for evaluating adsorption column dynamics and adsorptive process design (Sircar, 2000). Numerous models describing fixed bed adsorption have been published (Babu, 2005;Gupta, 2002;Hang, 2003;Ruthven, 1984;Šrámek 2005), using simplified linear driving force model (LDF) as well (Amanullah, 1999a(Amanullah, , 2000bDantas, 2011;Murillo, 2004;Tantet, 1995).…”

Section: Introductionmentioning

confidence: 99%

Modelling of NO adsorption in fixed bed on activated carbon

Kuboňová¹,

Obalová²,

Vlach³

et al. 2011

Chemical and Process Engineering

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Adsorption experiments of nitric oxide in nitrogen carrier gas were held on activated carbon in a fixed bed flow system. Breakthrough curves describing the dependence of exit concentrations of nitric oxide on time were matched with theoretical response curves calculated from the linear driving force model (LDF). The model assumes Langmuir adsorption isotherm for the description of non-linear equilibrium and overall mass transfer coefficient for mass transfer mechanism. Overall mass transfer coefficients were obtained by the method of least squares for fitting numerically modelled breakthrough curves with experimental breakthrough curves. It was found that LDF model fits all the breakthrough curves and it is a useful tool for modelling purposes.

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Carbon dioxide–nitrogen separation through adsorption on activated carbon in a fixed bed

Cited by 165 publications

References 21 publications

Sustainable biomass-based carbon adsorbents for post-combustion CO2 capture

Sustainable biomass-based carbon adsorbents for post-combustion CO2 capture

Isotherm, Thermodynamic and Kinetic Studies of Selective CO2 Adsorption on Chemically Modified Carbon Surfaces

Modelling of NO adsorption in fixed bed on activated carbon

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