Preliminary Feasibility Study for On-Site Hydrogen Station with Distributed CO2 Capture and Storage System

Kimura, Seiichro; Honda, Kuniaki; Kitamura, Keigo; Taniguch, Ikuo; Shitashima, Kiminori; Tsuji, Takeshi; Fujikawa, Shigenori

doi:10.1016/j.egypro.2014.11.490

Cited by 6 publications

(1 citation statement)

References 2 publications

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“…The PSA off-gas comes out at ambient pressure and contains certain amount of H 2 , which is used as fuel to keep the reformer at elevated temperature, and CO 2 is in the off-gas eventually emitted. A feasibility study revealed that the CO 2 separation properties observed could meet the required values to separate CO 2 in the off-gas [ 29 ] and that the amine-containing PVA membranes would be applicable to make the current H 2 process carbon-free.…”

Section: Discussionmentioning

confidence: 99%

Effect of amine structure on CO₂ capture by polymeric membranes

Taniguchi

Kinugasa

Toyoda

et al. 2017

Science and Technology of Advanced Materials

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Poly(amidoamine)s (PAMAMs) incorporated into a cross-linked poly(ethylene glycol) exhibited excellent CO2 separation properties over H2. However, the CO2 permeability should be increased for practical applications. Monoethanolamine (MEA) used as a CO2 determining agent in the current CO2 capture technology at demonstration scale was readily immobilized in poly(vinyl alcohol) (PVA) matrix by solvent casting of aqueous mixture of PVA and the amine. The resulting polymeric membranes can be self-standing with the thickness above 3 μm and the amine fraction less than 80 wt%. The gas permeation properties were examined at 40 °C and under 80% relative humidity. The CO2 separation performance increased with increase of the amine content in the polymeric membranes. When the amine fraction was 80 wt%, the CO2 permeability coefficient of MEA containing membrane was 604 barrer with CO2 selectivity of 58.5 over H2, which was much higher than the PAMAM membrane (83.7 barrer and 51.8, respectively) under the same operation conditions. On the other hand, ethylamine (EA) was also incorporated into PVA matrix to form a thin membrane. However, the resulting polymeric membranes exhibited slight CO2-selective gas permeation properties. The hydroxyl group of MEA was crucial for high CO2 separation performance.

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Section: Discussionmentioning

confidence: 99%