Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Vermaak, Leandri; Neomagus, Hein W.J.P.; Bessarabov, Dmitri

doi:10.3390/membranes11040282

Cited by 37 publications

(22 citation statements)

References 65 publications

(103 reference statements)

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“…The lowest power consumption was observed with 0.25 slpm at 160 C. When the gas flow rate on the anode side is reduced, poor performance is achieved by the depletion of the reactants at the electrode surface. 24 As expected, at flow rates less than 0.25 slpm (0.1 slpm and 0.05 slpm), there is a noticeable performance decrease. It can be interpreted that when the gas flow rate on the anode side increases, the gas leaves the cell without electrochemical reaction at the anode side outlet, and therefore the performance decreases.…”

Section: Pure H 2 Experimentssupporting

confidence: 65%

“…It can also be used in many industrial areas such as coal & biomass gasification, steam methane reforming, electrolyzer, etc. 10,24 Sedlak et al 22 investigated both H 2 purification and pressurization through an ECHP system. According to their study, a gas mixture with more than 98% of H 2 could be completely purified with a current efficiency of close to 100%.…”

Section: Introductionmentioning

confidence: 99%

“…Since the Nafion membrane cannot be kept at high humidity at these temperatures, acid-doped poly2,2-m-phenylene-5,5-bibenzimidazole (PBI) membranes offer significant advantages due to their superior thermal stability, non-humidity proton conductivity, 30 high chemical resistance, and high operating temperature in electrochemical applications. 31,32 According to the pioneering experimental study conducted by Vermaak et al 24 in recent years, different ratios of H 2 : CH 4 gas mixture were studied in the tests performed at temperatures between 100 C and 160 C and >99.9% H 2 purification was obtained. Perry et al 33 showed excellent durability for the PBI membrane of an HT-ECHP with 4000 h working hours.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the performance of high‐temperature electrochemical hydrogen purification from reformate gases

Durmuş

Çolpan

Devrim

2022

Intl J of Energy Research

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Summary In the present work, the purification of hydrogen from a hydrogen/carbon dioxide/carbon monoxide (H2:CO2:CO) mixture by a high‐temperature electrochemical purification (HT‐ECHP) system is examined. Electrochemical H2 purification experiments were carried out in the temperature range of 140‐180°C. The effects of the molar ratio of the gases in the mixture (H2:CO2:CO‐75:25:0, H2:CO2:CO‐72:26:2,0 H2:CO2:CO‐75:22:3, H2:CO2:CO‐75:20:5, H2:CO2:CO‐97:0:3, H2:CO2:CO‐95:0:5) and the operating temperature on the electrochemical H2 separation were investigated. As a result of the electrochemical H2 purification experiments, it was determined that the operating temperature is the most important parameter affecting the performance. According to the results obtained, H2 purity of 99.999% was achieved at 160°C with the reformate gas mixture containing 72% H2, 26% CO2, and 2% CO by volume. According to the polarization curves of the gas mixtures containing CO, high current densities at low voltage were reached at 180°C, and it was observed that the performance increased as the temperature increased, whereas the gas mixture without CO gave the best performance at 160°C.

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Section: Pure H 2 Experimentssupporting

confidence: 65%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of the performance of high‐temperature electrochemical hydrogen purification from reformate gases

Durmuş

Çolpan

Devrim

2022

Intl J of Energy Research

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“…The former involves the formation of valuable hydrocarbons, such as CH 4 (methane), C 2 H 4 (ethylene), and C 2 H 6 (ethane) [ 67 ], whereas the latter involves the electrochemical conversion of CO to CH 4 . The electrocatalytic reduction of CO 2 to CO and CH 4 has been reported with the same device [ 61 , 68 ], showing the plausibility of electrochemical reduction with electrocatalytic cells.…”

Section: Resultsmentioning

confidence: 69%

The CO Tolerance of Pt/C and Pt-Ru/C Electrocatalysts in a High-Temperature Electrochemical Cell Used for Hydrogen Separation

2021

Self Cite

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This paper describes an experimental evaluation and comparison of Pt/C and Pt-Ru/C electrocatalysts for high-temperature (100–160 °C) electrochemical hydrogen separators, for the purpose of mitigating CO poisoning. The performances of both Pt/C and Pt-Ru/C (Pt:Ru atomic ratio 1:1) were investigated and compared under pure hydrogen and a H2/CO gas mixture at various temperatures. The electrochemically active surface area (ECSA), determined from cyclic voltammetry, was used as the basis for a method to evaluate the performances of the two catalysts. Both CO stripping and the underpotential deposition of hydrogen were used to evaluate the electrochemical surface area. When the H2/CO gas mixture was used, there was a complex overlap of mechanisms, and therefore CO peak could not be used to evaluate the ECSA. Hence, the hydrogen peaks that resulted after the CO was removed from the Pt surface were used to evaluate the active surface area instead of the CO peaks. Results revealed that Pt-Ru/C was more tolerant to CO, since the overlapping reaction mechanism between H2 and CO was suppressed when Ru was introduced to the catalyst. SEM images of the catalysts before and after heat treatment indicated that particle agglomeration occurs upon exposure to high temperatures (>100 °C)

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“…These results are unprecedented given that previous reports on diamine-modified polyimide membranes generally observed an increase in permeability but reduced permeability ( Table 3 ), which was simply attributed to the membrane densification by crosslinking effects [ 24 , 25 , 29 , 31 , 47 ]. Compared to the pristine Matrimid membrane, FDA2-MAT presents excellent potential in H 2 /CH 4 and CO 2 /CH 4 separation applications, which include the production of H 2 as a renewable energy source for the hydrogen economy, natural gas sweetening, and biogas upgrading [ 2 , 3 , 48 , 49 ].…”

Section: Resultsmentioning

confidence: 99%

Surface Modification of Matrimid® 5218 Polyimide Membrane with Fluorine-Containing Diamines for Efficient Gas Separation

Lee

Park

et al. 2022

Membranes

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Polyimide membranes have been widely investigated in gas separation applications due to their high separation abilities, excellent processability, relatively low cost, and stabilities. Unfortunately, it is extremely challenging to simultaneously achieve both improved gas permeability and selectivity due to the trade-off relationship in common polymer membranes. Diamine modification is a simple strategy to tune the separation performance of polyimide membranes, but an excessive loss in permeability is also generally observed. In the present work, we reported the effects of diamine type (i.e., non-fluorinated and fluorinated) on the physicochemical properties and the corresponding separation performance of a modified membrane using a commercial Matrimid® 5218 polyimide. Detailed spectroscopic, thermal, and surface analyses reveal that the bulky fluorine groups are responsible for the balanced chain packing modes in the resulting Matrimid membranes compared to the non-fluorinated diamines. Consequently, the modified Matrimid membranes using fluorinated diamines exhibit both higher gas permeability and selectivity than those of pristine Matrimid, making them especially effective for improving the separation performance towards H2/CH4 and CO2/CH4 pairs. The results indicate that the use of fluorinated modifiers may offer new opportunities to tune the gas transport properties of polyimide membranes.

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Hydrogen Separation and Purification from Various Gas Mixtures by Means of Electrochemical Membrane Technology in the Temperature Range 100–160 °C

Cited by 37 publications

References 65 publications

Investigation of the performance of high‐temperature electrochemical hydrogen purification from reformate gases

Investigation of the performance of high‐temperature electrochemical hydrogen purification from reformate gases

The CO Tolerance of Pt/C and Pt-Ru/C Electrocatalysts in a High-Temperature Electrochemical Cell Used for Hydrogen Separation

Surface Modification of Matrimid® 5218 Polyimide Membrane with Fluorine-Containing Diamines for Efficient Gas Separation

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