| 초록 |
It is widely known that lactic acid (LA) can be produced from biomass through biological fermentation and is an environmentally friendly chemical used in the synthesis of renewable polymers. Selectively removing the hydroxyl group of the lactic acid allows for the production of acrylic acid (AA), which is a monomer widely used for synthesizing the various polymers in the petrochemical industry. Since decarbonylation or decarboxylation of LA to acetaldehyde (AD) are kinetically faster, it is difficult to obtain a high yield of AA. Therefore, this study aims to develop the selective catalyst that can convert LA into AA, focusing on the zeolite-based catalysts. Because the zeolite catalyst has a uniform microporous structure and has excellent stability and reusability at high temperatures, it is an ideal material for the dehydration of LA. In this study, various alkali metals were ion-exchanged with H-ZSM-5 (15), and the critical roles of the precursor solution pH in promoting the AA selectivity were investigated. To develop the structure-activity relationship for the LA dehydration, the catalysts were characterized using NH3/CO2-TPD, ICP-OES, XRD, and BET. |
