| 초록 |
The sustainable production of high-value chemicals from renewable sources such as biomass have great attentions due to carbon regulations. Although the selective control of dehydration is highly challenging, the dehydration of biomass-derived lactic acid (LA) to acrylic acid (AA) is the promising green route. Prior studies reported that the control of catalyst acid-base properties is the key to achieve the high AA selectivity, and potassium-exchanged ZSM-5 especially with the potassium halide salts exhibited the exceptional selectivity to AA over ~80%.In this study, The in-situ IR analysis revealed that the amount of sodium or potassium lactate is directly correlated with the AA selectivity, i.e., the greater the amount of lactate, the higher the selectivity. This indicates that the first ion-exchange step between LA and zeolites is the rate-determining step for the overall AA production. Overall, our results would be helpful to design the high-selectivity catalyst for LA dehydration. |
