Taniguchi Ikuo, Kinugasa Kae, Toyoda Mariko, Minezaki Koki
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka, Japan.
Graduate School of Integrated Frontier Sciences, Kyushu University, Fukuoka, Japan.
Sci Technol Adv Mater. 2017 Nov 22;18(1):950-958. doi: 10.1080/14686996.2017.1399045. eCollection 2017.
Poly(amidoamine)s (PAMAMs) incorporated into a cross-linked poly(ethylene glycol) exhibited excellent CO separation properties over H. However, the CO permeability should be increased for practical applications. Monoethanolamine (MEA) used as a CO determining agent in the current CO 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 CO separation performance increased with increase of the amine content in the polymeric membranes. When the amine fraction was 80 wt%, the CO permeability coefficient of MEA containing membrane was 604 barrer with CO selectivity of 58.5 over H, 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 CO-selective gas permeation properties. The hydroxyl group of MEA was crucial for high CO separation performance.
聚（酰胺 - 胺）（PAMAMs）掺入交联聚（乙二醇）中，对氢气表现出优异的一氧化碳分离性能。然而，为了实际应用，一氧化碳渗透率需要提高。在目前示范规模的一氧化碳捕获技术中用作一氧化碳测定剂的单乙醇胺（MEA），通过将聚乙烯醇（PVA）与该胺的水性混合物进行溶剂浇铸，很容易固定在聚乙烯醇（PVA）基质中。所得的聚合物膜可以自立，厚度大于3μm，胺含量小于80 wt％。在40°C和80％相对湿度下检查气体渗透性能。聚合物膜中的一氧化碳分离性能随着胺含量的增加而提高。当胺含量为80 wt％时，含MEA的膜的一氧化碳渗透系数为604巴每尔，对氢气的一氧化碳选择性为58.5，在相同操作条件下远高于PAMAM膜（分别为83.7巴每尔和51.8）。另一方面，乙胺（EA）也被掺入PVA基质中以形成薄膜。然而，所得的聚合物膜表现出轻微的一氧化碳选择性气体渗透性能。MEA的羟基对于高一氧化碳分离性能至关重要。
