A comprehensive description of water vapor equilibriums on alumina F-200: Adsorption, desorption, and H2O/CO2 binary adsorption

Liu, Xiang Jun; Shi, Yun Fei; Kalbassi, Mohammad Ali; Underwood, R.P.; Liu, Ying Shu

doi:10.1016/j.seppur.2014.06.052

Cited by 13 publications

(13 citation statements)

References 22 publications

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“…The capillary condensation, based on a uniform pore distribution, however, does not have a finite limit and cannot describe a type 4 isotherm of the Brunauer's classification fully. This will cause an overprediction at low temperature outside the scope of this work and a pressure close the saturation pressure, which could be solved by including the maximum amount adsorbed in the mesopore, if known (Liu et al 2013(Liu et al ,2014. Despite the improvement which could be made for the region close to the saturation pressure, the isotherm model is able to describe the equilibrium data under sorption enhanced reaction temperatures and pressures well.…”

Section: Equation Number 14mentioning

confidence: 95%

Steam adsorption on molecular sieve 3A for sorption enhanced reaction processes

Kampen

Boon

Annaland³

2020

Adsorption

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Steam adsorption enhanced reaction processes are a promising process intensification for many types of reactions, where water is formed as a byproduct. To assess the potential of these processes, adequate models are required that accurately describe water adsorption, particularly under the desired elevated temperatures and pressures. In this work, an adsorption isotherm is presented for H2O adsorption at 200–350 °C and 0.05–4.5 bar partial pressure on molecular sieve (LTA) 3A. The isotherm has been developed on the basis of experimental data obtained from a thermogravimetric analysis and integrated breakthrough curves. The experimental data at lower steam partial pressures can be described with a Generalized Statistical Thermodynamic Adsorption (GSTA) isotherm, whereas at higher steam partial pressures the experimental data can be adequately captured by capillary condensation. Based on the characteristics of the adsorbent particles, a linear driving force relation has been derived for the adsorption mass transfer rate and the apparent micropore diffusivity is determined. The isotherm and mass transport model presented here prove to be adequate for modelling and improved evaluation of steam adsorption enhanced reaction processes.

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Section: Equation Number 14mentioning

confidence: 95%

Steam adsorption on molecular sieve 3A for sorption enhanced reaction processes

Kampen

Boon

Annaland³

2020

Adsorption

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“…The analytical models in the literature most likely to be able to reproduce the main adsorptiondesorption branches and the scanning curves for water vapor on SBA-15 [54] are the ones formulated by Brunauer et al [59]; Rajniak et al [60]; Moore et al [61]; Liu et al [54]. The analytical expressions of these models can be found in table 7.1.…”

Section: Literatures Modelsmentioning

confidence: 99%

“…Brunauer et al The models formulated by Rajniak et al [60] and Liu et al [54] have been used for the simulation of pressure swing adsorption processes in packed beds for water vapor removal [62][63][64][65]. Therefore, such models are probably considered the most appropriate analytical expressions for the correlation of type IV isotherms.…”

Section: Ref Model Expressionmentioning

confidence: 99%

“…Relatively simpler analytical equilibrium adsorption models have been developed to interpret the adsorption of condensable vapors on ordered mesoporous solids [54][55][56]. The key point of these models is to consider a multilayer surface adsorption sequentially followed by the capillary condensation of the liquid inside a distribution of mesopores.…”

Section: Introductionmentioning

confidence: 99%

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Molecular simulation and experiments of water adsorption in a high surface area activated carbon: Hysteresis, scanning curves and spatial organization of water clusters

Sarkisov

Centineo

Brandani

2017

Carbon

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“…The pore volume filling theory (Doong and Yang 1988) provides a practical way to describe the equilibrium behavior of arbitrary two-component adsorption. By combining the Freundlich-Gaussian (F-G) equation (Liu et al 2013) for H2O and the Freundlich equation for CO2, a two-component adsorption isotherm model for H2O/CO2 competitive adsorption on F200 proposed by Liu et al (2014) is obtained. The models are respectively expressed as…”

Section: Adsorption and Desorption Equilibriums Of H2o/co2 Mixture Onmentioning

confidence: 99%

Desorption characteristics of H2O and CO2 from alumina F200 under different feed/purge pressure ratios and regeneration temperatures

et al. 2017

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Air pre-purification is an important process for industrial air separation with cryogenic distillation method. This process is typically realized by pressure swing adsorption or temperature swing adsorption. H2O and CO2 are the two major components to be removed among the contaminants. In this paper, we establish a mathematical model describing the mass and heat balances in the adsorption bed, and the double-component adsorption/desorption equilibriums of H2O/CO2 on alumina F200. To conduct desorption performance analysis, a one-cycle process consisting of feed, blowdown, and purge step under different operating conditions, such as feed/purge pressure ratio and regeneration temperature, is numerically studied. The effect of heat on the desorption performance of H2O and CO2 is investigated by changing the purge gas temperature within 30 °C to 200 °C under feed/purge pressure ratios of 6:1.1 and 10:1.1, respectively. Detailed results of the H2O and CO2 adsorption/desorption behaviors in the bed are demonstrated. The mass and heat transfer characteristics during desorption are also analyzed. Suggestions on the optimization of the heating temperature and duration of purge gas are also proposed.

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A comprehensive description of water vapor equilibriums on alumina F-200: Adsorption, desorption, and H2O/CO2 binary adsorption

Cited by 13 publications

References 22 publications

Steam adsorption on molecular sieve 3A for sorption enhanced reaction processes

Steam adsorption on molecular sieve 3A for sorption enhanced reaction processes

Molecular simulation and experiments of water adsorption in a high surface area activated carbon: Hysteresis, scanning curves and spatial organization of water clusters

Desorption characteristics of H2O and CO2 from alumina F200 under different feed/purge pressure ratios and regeneration temperatures

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