Kinetic Separation of Landfill Gas by a Two-Bed Pressure Swing Adsorption Process Packed with Carbon Molecular Sieve:  Nonisothermal Operation

Kim, Min Bae; Bae, Yang‐Seop; Choi, Dae Ki; Lee, Chang Ha

doi:10.1021/ie0511074

Cited by 96 publications

(65 citation statements)

References 27 publications

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“…CH 4 and CO 2 ) on different adsorbents at pressures below 1000 kPa mainly because it is relatively easy to evaluate in commercial laboratory appliances [52][53][54][55]. However, experimental measurement by means of multi-component adsorption isotherms over wide ranges of pressure, temperature and feed gas compositions, which is necessary to predict the competitive adsorption behavior of gas mixtures, is time-consuming and sometimes difficult to carry out experimentally with sufficient accuracy.…”

Section: Introductionmentioning

confidence: 99%

Adsorption performance indicators for the CO2/CH4 separation: Application to biomass-based activated carbons

Álvarez-Gutiérrez

Gil

Rubiera

et al. 2016

Fuel Processing Technology

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A deep understanding of the interaction and competition between different gases on adsorption processes is essential for the design and optimization of industrial units. Two biomass-derived activated carbons (CS-CO 2 and CS-H 2 O), synthesized in our laboratory, were evaluated as selective adsorbents for the separation of CO 2 from CO 2 /CH 4 mixtures. Adsorption isotherms of the pure gases (i.e., CO 2 and CH 4 ) were performed in a high-pressure magnetic suspension balance at three different temperatures (303, 323 and 343 K) up to 1000 kPa and the data were correlated using the Sips and Toth models. The Ideal Adsorbed Solution Theory (IAST) was applied to predict the binary adsorption equilibrium.The results were validated by means of experimental breakthrough tests in a fixedbed set-up. The isosteric heats of adsorption were estimated from the pure component adsorption data by means of the Clausius-Clapeyron equation and the Sips and Toth equations. All of the equilibrium data were integrated in a performance indicator defined so as to be able to evaluate the adsorbent in terms of selectivity, working capacity and adsorption enthalpy under conditions relevant to the specific application. Although both CS activated carbons had similar textural features, CS-CO 2 showed a better overall performance than CS-H 2 O for the 1 separation of CO 2 from CO 2 /CH 4 mixtures. Our results highlight the importance of carrying out a deep analysis of the adsorption equilibrium under conditions relevant to the foreseen application in order to identify the most suitable adsorbent.

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Section: Introductionmentioning

confidence: 99%

Adsorption performance indicators for the CO2/CH4 separation: Application to biomass-based activated carbons

Álvarez-Gutiérrez

Gil

Rubiera

et al. 2016

Fuel Processing Technology

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show abstract

“…Information about the adsorption equilibrium of the different species is vital to design and model adsorption processes [19][20][21][22][23][24][25][26][27]. The time required to achieve the equilibrium state may be also important, particularly when the size of the pores of the adsorbent are close to the size of the molecules to be separated [28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

“…Over the years it has been demonstrated that PSA technology can be used in a large variety of applications: hydrogen purification [58][59][60][61][62][63][64][65][66][67][68][69][70][71][72], air separation [57,[73][74][75][76][77][78][79][80], OBOGS (on-board gas generation system) [81], CO 2 removal [82][83][84], noble gases (He, Xe, Ar) purification [85][86][87], CH 4 upgrading [31,34,37,40,42,[88][89][90][91][92][93][94][95][96], n-iso paraffin separation [5,[97][98][99]…”

Section: Introductionmentioning

confidence: 99%

Advances in Pressure Swing Adsorption for Gas Separation

Grande

2012

ISRN Chemical Engineering

186

108

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Pressure swing adsorption (PSA) is a well-established gas separation technique in air separation, gas drying, and hydrogen purification separation. Recently, PSA technology has been applied in other areas like methane purification from natural and biogas and has a tremendous potential to expand its utilization. It is known that the adsorbent material employed in a PSA process is extremely important in defining its properties, but it has also been demonstrated that process engineering can improve the performance of PSA units significantly. This paper aims to provide an overview of the fundamentals of PSA process while focusing specifically on different innovative engineering approaches that contributed to continuous improvement of PSA performance.

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“…The second simplified energy balance, hereinafter referred to as Simplified 2 model, has the following formula (Da Silva et al 1999, 2001Ribeiro et al 2008;Kim et al 2006).…”

Section: Commonly Used Energy Balancesmentioning

confidence: 99%

“…Meanwhile, several researchers have included mathematical terms describing the pressure change with time in the energy balance in order to simulate the pressure-varying steps more accurately (Da Silva et al 1999, 2001Ribeiro et al 2008;Kim et al 2006). Furthermore, a separate momentum equation, e.g.…”

Section: Introductionmentioning

confidence: 99%

New momentum and energy balance equations considering kinetic energy effect for mathematical modelling of a fixed bed adsorption column

et al. 2015

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It was aimed to derive rigorous momentum and energy balance equations where the change of kinetic energy in both spatial and temporal domains of a fixed-bed adsorption column was newly taken into account. While the effect of kinetic energy on adsorption column dynamics is negligible in most cases, it can become more and more influential with an adsorption column experiencing a huge pressure drop or with the gas velocity changing abruptly with time and along the column. The rigorous momentum and energy balance equations derived in this study have been validated with two limiting cases: (1) an inert gas flow through a packed column with a very high pressure drop and (2) blowdown of an adiabatic empty column. The new energy balance including the kinetic energy effect paves a way for simulating with an improved accuracy a Rapid Pressure Swing Adsorption process that inherently involves a very high pressure drop along the column and requires very high pressure change rates for column blowdown and pressurisation.

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Kinetic Separation of Landfill Gas by a Two-Bed Pressure Swing Adsorption Process Packed with Carbon Molecular Sieve: Nonisothermal Operation

Cited by 96 publications

References 27 publications

Adsorption performance indicators for the CO2/CH4 separation: Application to biomass-based activated carbons

Adsorption performance indicators for the CO2/CH4 separation: Application to biomass-based activated carbons

Advances in Pressure Swing Adsorption for Gas Separation

New momentum and energy balance equations considering kinetic energy effect for mathematical modelling of a fixed bed adsorption column

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