Improvement of Properties of Poly(L-lactic acid) through Solution Blending of Biodegradable Polymers

• Main Authors: Yusi Prasetyaningsih, Hendriyana, Herri Susanto
• Format: Article
• Language: English
• Published: ITB Journal Publisher 2016-09-01
• Series: Journal of Engineering and Technological Sciences
• Subjects: catalyst activity; catalyst crystallinity; co-precipitation method; Cu/ZnO catalyst; direct DME synthesis; impregnation method; pore properties; XRD analysis
• Online Access: http://journals.itb.ac.id/index.php/jets/article/view/2962/1649
• ISSN: 2337-5779; 2338-5502

Cu/ZnO catalyst was succesfully prepared using a coprecipitation method. The mixing procedure of the Cu(NO3)2, Zn(NO3)2 and Na2CO3 solutions had an important influence on the characteristics of the catalyst. The best catalyst obtained was the one prepared with slow mixing of the salt solutions and a CuO/ZnO molar ratio of 50:50. This raw catalyst had a maximum surface area of about 61.6 m2/g. Increasing the CuO/ZnO molar ratio caused an agglomeration of precipitated particles, reducing the surface area. A much better catalyst was obtained using an impregnation method, in which -Al2O3 was used as support. The impregnated catalyst had a surface area of about 151 m2/g. Activity tests were carried out in a fixed-bed reactor containing 1 g of catalyst and a flow of syngas at a rate of 60 mL/min. The reaction temperature was 170°C and the pressure was 20 barg. The best coprecipitated catalyst gave a CO conversion of about 10%, while the impregnated catalyst gave a CO conversion of up to 69%.