A parametric study of layered bed PSA for hydrogen purification

Ribeiro, Ana M.; Grande, Carlos A.; Lopes, Filipe V. S.; Loureiro, José M.; Rodrigues, Alı́rio E.

doi:10.1016/j.ces.2008.07.017

Cited by 199 publications

(142 citation statements)

References 18 publications

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“…Accordingly, the other mass transfer resistances have been neglected (i.e., macropore and film diffusion). This simplification have been supported by previous studies [36][37][38] and have been already successfully applied by other works simulating the behavior of PSA units [6,25]. The kinetic of the mass transfer process is accounted for the Linear Driving Force (LDF) approximation [39][40][41][42].…”

Section: Adsorption Bed Modelmentioning

confidence: 48%

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Evaluating Pressure Swing Adsorption as a CO2 separation technique in coal-fired power plants

Riboldi

Bolland

2015

International Journal of Greenhouse Gas Control

120

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The paper provides with a first assessment on the suitability of Pressure Swing Adsorption (PSA) as a valid option for Carbon Capture and Storage (CCS) in coal-fired power plants. A full-plant analysis of an Advanced SuperCritical (ASC) pulverized coal plant and of an Integrated Gasification Combined Cycle (IGCC) plant, operating with a PSA unit, is presented. The systems selected aim to represent the most diffused options for coalbased power generation, respectively in a post-and pre-combustion application of CO2 separation. The definition of the PSA process is tailored for the two different scenarios considered, starting from the adsorbent selected (zeolite 5A and activated carbon, respectively for post-and pre-combustion). The objective is to investigate the competitiveness of PSA with respect to the benchmark technology for CCS, namely absorption. In order to consider the different aspects measuring the effectiveness of a CO2 separation technique, the performance of the power plants is evaluated in terms of CO2 separation performance, energy efficiency and footprint of the technology. The post-combustion scenario analysis shows that PSA can be competitive with regard to the separation and the energy performance. PSA is able to match the CO2 separation requirements, and the relative energy penalty is slightly lower than that resulting from amine-absorption. Despite that, the footprint of the PSA unit demonstrates to be way larger than that related to absorption and unlikely acceptable. PSA in the pre-combustion scenario returns encouraging results, approaching the outcomes achieved with absorption both in terms of CO2 separation performance and plant energy efficiency. The footprint, even though significantly larger, appears to be reasonable for actual implementation.

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Section: Adsorption Bed Modelmentioning

confidence: 48%

“…Its application is in line with the material balance simplifications above-mentioned. Similarly the energy balances have been simplified assuming thermal equilibrium between the gas and solid phases, reducing to one the equation needed [6]. An energy balance with the wall and the environment should be considered.…”

Section: Adsorption Bed Modelmentioning

confidence: 99%

Evaluating Pressure Swing Adsorption as a CO2 separation technique in coal-fired power plants

Riboldi

Bolland

2015

International Journal of Greenhouse Gas Control

120

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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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“…Over the years, many publications have considered the optimisation of VPSA systems (Haghpanah et al, 2013;Jiang et al, 2003;Nikoli et al, 2009;Nilchan & Pantelides, 1998;Krutka & Sjostrom, 2011;Ishibashi 20 et al, 1996;Krishnamurthy et al, 2014;Ribeiro et al, 2009Ribeiro et al, , 2008Da Silva et al, 1999). Usually, the governing hyperbolic/parabolic partial differential algebraic equations (PDAE) are simulated to cyclic steady state for each parameter set generated by the optimisation solver.…”

mentioning

confidence: 99%

Multi-objective optimisation using surrogate models for the design of VPSA systems

Beck

Friedrich

Brandani

et al. 2015

Computers & Chemical Engineering

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Vacuum/pressure swing adsorption is an attractive and often energy efficient separation process for some applications. However, there is often a trade-off between the different objectives: purity, recovery and power consumption. Identifying those trade-offs is possible through use of multi-objective optimisation methods but this is computationally challenging due to the size of the search space and the need for high fidelity simulations due to the inherently dynamic nature of the process. This paper presents the use of surrogate modelling to address the computational requirements of high fidelity simulations needed to evaluate alternative designs. We present SbNSGA-II ALM, surrogate based NSGA-II, a robust and fast multi-objective optimisation method based on kriging surrogate models and NSGA-II with Active Learning MacKay (ALM) design criteria. The method is evaluated by application to an industrially relevant case study: a two column six step system for CO 2 /N 2 separation. A 5 times reduction in computational effort is observed.

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A parametric study of layered bed PSA for hydrogen purification

Cited by 199 publications

References 18 publications

Evaluating Pressure Swing Adsorption as a CO2 separation technique in coal-fired power plants

Evaluating Pressure Swing Adsorption as a CO2 separation technique in coal-fired power plants

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

Multi-objective optimisation using surrogate models for the design of VPSA systems

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