Institute of Chemistry and Chemical Engineering, Taiyuan University of Technology, 030024 PR China.
Institute of Chemistry and Chemical Engineering, Taiyuan University of Technology, 030024 PR China.
Bioresour Technol. 2018 Dec;270:166-171. doi: 10.1016/j.biortech.2018.09.037. Epub 2018 Sep 8.
Mesocarbon microbeads (MCMB) from coal tar pitch have excellent mechanical strength, high density, and good thermal stability. Moreover, a great deal of aromatic constituents occur on its surface, favoring the substitution reaction of sulfonic group. Results showed that the total acid and -SOH amount was 4.36 mmol/g and 2.18 mmol/g, respectively. Moreover, the yield of total reducing sugar (TRS) and conversion ratio (Cr) for pretreated cellulose (DP = 101.5) can reach 66.7% and 68.8% at 140 °C for 240 min in distilled water, respectively. After four recycles, the TRS and Cr decreased by 12.6% and 10.2%, respectively. Through the secondary and third regeneration for the catalyst, acid density still reached 88.1% and 87.2% of the initial R-MCMB-SOH, demonstrating excellent regeneration ability and recyclability of the solid acid. Therefore, MCMB-based solid acid exhibits an attractive potential in the conversion of cellulose into platform chemical compounds.
中间相炭微球（MCMB）来源于煤焦油沥青，具有优异的机械强度、高密度和良好的热稳定性。此外，其表面存在大量的芳构化成分，有利于磺酸基团的取代反应。结果表明，总酸和 -SOH 含量分别为 4.36mmol/g 和 2.18mmol/g。此外，预处理纤维素（DP=101.5）在 140°C 下蒸馏水中反应 240 分钟时，总还原糖（TRS）和转化率（Cr）分别达到 66.7%和 68.8%。经过四次循环后，TRS 和 Cr 分别下降了 12.6%和 10.2%。通过催化剂的二次和三次再生，酸密度仍达到初始 R-MCMB-SOH 的 88.1%和 87.2%，表现出良好的再生能力和固体酸的可循环性。因此，基于 MCMB 的固体酸在将纤维素转化为平台化合物方面具有诱人的潜力。
