Breakthrough Curves of Methane at High Pressures for H<sub>2</sub> Purification Processes

Bastos‐Neto, Moises; Möller, Andreas; Böhm, J.; Gläser, Roger; Staudt, Reiner

doi:10.1002/cite.201000155

Cited by 6 publications

(4 citation statements)

References 29 publications

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“…Breakthrough curves of methane (Figure ) have previously been reported and discussed . Experimental breakthrough curves for nitrogen with the respective model results using eq for the evaluation of the axial dispersion coefficient, D ax , are plotted in Figure .…”

Section: Resultsmentioning

confidence: 93%

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Bastos‐Neto

Moeller

Staudt

et al. 2011

Ind. Eng. Chem. Res.

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The separation of nitrogen and methane from hydrogen-rich mixtures is systematically investigated on a recently developed binder-free zeolite 5A. For this adsorbent, the present work provides a series of experimental data on adsorption isotherms and breakthrough curves of nitrogen and methane, as well as their mixtures in hydrogen. Isotherms were measured at temperatures of 283À313 K and pressures of up to 1.0 MPa. Breakthrough curves of CH 4 , N 2 , and CH 4 /N 2 in H 2 were obtained at temperatures of 300À305 K and pressures ranging from 0.1 to 6.05 MPa with different feed concentrations. An LDF-based model was developed to predict breakthrough curves using measured and calculated data as inputs. The number of parameters and the use of correlations were restricted to focus on the importance of measured values. For the given assumptions, the results show that the model predictions agree satisfactorily with the experiments under the different operating conditions applied.

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Section: Resultsmentioning

confidence: 93%

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Bastos‐Neto

Moeller

Staudt

et al. 2011

Ind. Eng. Chem. Res.

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“…constant relationship). Non-linear isotherms, like the ones described by Langmuir or Toth isotherm models, may shift the breakthrough curves to shorter times and the curves become steeper with increasing concentration, for an isothermal case [19,30]. This influence is qualitatively illustrated in Fig.…”

Section: Resultsmentioning

confidence: 97%

Dynamic bed measurements of CO adsorption on microporous adsorbents at high pressures for hydrogen purification processes

Bastos‐Neto

Moeller

Staudt

et al. 2011

Separation and Purification Technology

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a b s t r a c tRegarding the importance of adsorptive removal of carbon monoxide from hydrogen-rich mixtures for novel applications (e.g. fuel cells), this work provides a series of experimental data on adsorption isotherms and breakthrough curves of carbon monoxide. Three recently developed 5A zeolites and one commercial activated carbon were used as adsorbents. Isotherms were measured gravimetrically at temperatures of 278-313 K and pressures up to 0.85 MPa. Breakthrough curves of CO were obtained from dynamic column measurements at temperatures of 298-301 K, pressures ranging from 0.1 MPa to ca. 6 MPa and concentrations of CO in H 2 /CO mixtures of 5-17.5 mol%. A simple mathematical model was developed to simulate breakthrough curves on adsorbent beds using measured and calculated data as inputs. The number of parameters and the use of correlations to evaluate them were restricted in order to focus the importance of measured values. For the given assumptions and simplifications, the results show that the model predictions agree satisfactorily with the experimental data at the different operating conditions applied.

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“…A back-pressure regulator is often used to control the total pressure during adsorption. 30 Furthermore, measurements can be made using vapors introduced by a carrier gas, and a tracer gas may be included to facilitate indirect measurement of the effluent flow rate as described by Wilkins et al 26 However, the inclusion of carrier gases in SB measurements can affect the adsorption of components of interest. 31 SB measurements are heavily dependent on accurate dead volume measurements, which may be done with sand or glass beads prior to adsorption measurements.…”

Section: Breakthrough Methodsmentioning

confidence: 99%

“…This simple mole balance to determine how much of each component is “missing” from the gas phase is shared by many other measurement techniques. A back-pressure regulator is often used to control the total pressure during adsorption . Furthermore, measurements can be made using vapors introduced by a carrier gas, and a tracer gas may be included to facilitate indirect measurement of the effluent flow rate as described by Wilkins et al However, the inclusion of carrier gases in SB measurements can affect the adsorption of components of interest …”

Section: Breakthrough Methodsmentioning

confidence: 99%

Opening the Toolbox: 18 Experimental Techniques for Measurement of Mixed Gas Adsorption

Shade

Bout

Sholl

et al. 2022

Ind. Eng. Chem. Res.

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Adsorption separation systems offer the possibility to replace or augment legacy separation systems with more efficient processes, resulting in enormous savings in energy. However, adsorption systems are not as easily evaluated as possible unit operations in process simulation software compared to distillation or absorption columns. The lack of ability to predict adsorption of gas mixtures represents a persistent barrier holding back implementation of adsorption separations. This shortcoming is the result of an equally persistent deficiency in the ability to measure adsorption of gas mixtures, despite the huge variety of existing methods to measure mixture adsorption. This work presents a comprehensive overview of 18 techniques used to measure mixture adsorption, including the equipment and principles used in each method as well as the strengths and shortcomings of each technique. This work also provides recommendations for which methods may best suit the individual needs of experimentalists interested in measuring mixture adsorption and includes an outlook on the future of mixture adsorption measurement.

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Breakthrough Curves of Methane at High Pressures for H₂ Purification Processes

Cited by 6 publications

References 29 publications

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Dynamic bed measurements of CO adsorption on microporous adsorbents at high pressures for hydrogen purification processes

Opening the Toolbox: 18 Experimental Techniques for Measurement of Mixed Gas Adsorption

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Breakthrough Curves of Methane at High Pressures for H2 Purification Processes

Cited by 6 publications

References 29 publications

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Adsorption Measurements of Nitrogen and Methane in Hydrogen-Rich Mixtures at High Pressures

Dynamic bed measurements of CO adsorption on microporous adsorbents at high pressures for hydrogen purification processes

Opening the Toolbox: 18 Experimental Techniques for Measurement of Mixed Gas Adsorption

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Breakthrough Curves of Methane at High Pressures for H₂ Purification Processes