Clean Energy Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea; Department of Wood Science, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada.
Graduate School of International Agricultural Technology, Seoul National University, Pyeongchang 25354, Republic of Korea.
Waste Manag. 2022 May 1;144:41-48. doi: 10.1016/j.wasman.2022.03.005. Epub 2022 Mar 17.
The efficient strategy for waste conversion and resource recovery is of great interest in the sustainable bioeconomy context. This work reports on the catalytic upcycling of waste corrugated cardboard (WCC) into lactic acid using lanthanide triflates catalysts. WCC, a primary contributor to municipal solid wastes, has been viewed as a feedstock for producing a wide range of renewable products. Hydrothermal conversion of WCC was carried out in the presence of several lanthanide triflates. The reaction with erbium(III) triflate (Er(OTf)) and ytterbium(III) triflate (Yb(OTf)) resulted in high lactic acid yields, 65.5 and 64.3 mol%, respectively. In addition, various monomeric phenols were readily obtained as a co-product stream, opening up opportunities in waste management and resource recovery. Finally, technoeconomic analysis was conducted based on the experimental results, which suggests a significant economic benefit of chemocatalytic upcycling of WCC into lactic acid.
在可持续生物经济背景下，高效的废物转化和资源回收策略备受关注。本工作报道了使用镧系三氟甲磺酸酯催化剂将废瓦楞纸板（WCC）催化升级为乳酸的方法。WCC 是城市固体废物的主要来源之一，已被视为生产各种可再生产品的原料。在几种镧系三氟甲磺酸酯的存在下进行了 WCC 的水热转化。用三氟甲磺酸铒(III)（Er(OTf)）和三氟甲磺酸镱(III)（Yb(OTf)）进行反应，分别得到了 65.5 和 64.3 mol%的高乳酸收率。此外，还很容易得到各种单体酚作为副产物流，为废物管理和资源回收开辟了新的机会。最后，根据实验结果进行了技术经济分析，结果表明，WCC 通过化学催化升级为乳酸具有显著的经济效益。
