Department of Biological Systems Engineering, Washington State University, Richland, WA 99354-1671, United States; Department of Agricultural and Biosystems Engineering, Central Luzon State University, Science City of Muñoz, 3120 Nueva Ecija, Philippines.
Department of Biological Systems Engineering, Washington State University, Richland, WA 99354-1671, United States.
Bioresour Technol. 2021 Jan;319:124194. doi: 10.1016/j.biortech.2020.124194. Epub 2020 Sep 30.
Biomass-based sulfonated carbon catalyst (SCC) was prepared from corncob via direct sulfuric acid carbonization-sulfonation treatment. Central composite design was used to evaluate temperature and time for optimizing SCC yield and sulfonic acid (SOH) density. The SOH groups were successfully introduced to the SCC as evidenced by FTIR and sulfur analysis. Numerical optimization results showed that 100 °C and 5.78 h are the optimal conditions for maximizing yield (61.24%) and SOH density (1.1408 mmol/g). The highest ethanol organosolv lignin (EOL) yield of 63.56% with a substrate yield of 39.08% was achieved at 20% SCC loading in the ethanol organosolv delignification of lignocellulosic biomass. The FTIR spectra of the isolated lignin revealed typical features of G-lignin, indicating that no drastic changes took place in the lignin structure during the process. This study developed a simple one-step preparation method of SCC, which was successfully used as a catalyst in an organosolv delignification of biomass.
基于生物质的磺化碳催化剂（SCC）是通过玉米芯的直接硫酸碳化-磺化处理制备的。采用中心复合设计来评估温度和时间，以优化 SCC 产率和磺酸基（SOH）密度。FTIR 和硫分析证明成功地将 SOH 基团引入到 SCC 中。数值优化结果表明，在 100°C 和 5.78 小时的条件下，可以实现产率（61.24%）和 SOH 密度（1.1408 mmol/g）的最大化。在木质纤维素生物质的乙醇有机溶剂脱木质素中，SCC 的负载量为 20%时，EOL（乙醇有机溶剂木质素）的最高收率为 63.56%，底物收率为 39.08%。分离出的木质素的 FTIR 谱图显示出 G 木质素的典型特征，表明在该过程中木质素结构没有发生剧烈变化。本研究开发了一种简单的一步法制备 SCC 的方法，并成功地将其用作生物质有机溶剂脱木质素的催化剂。
