Heterogeneous hydrolysis of cellulose into glucose over phenolic residue-derived solid acid
Heterogeneous hydrolysis of cellulose into glucose over phenolic residue-derived solid acid
复制标题
DOI：
10.1016/j.fuel.2013.06.021
复制
发表时间：
2013-11
期刊：
影响因子：
7.4
通讯作者：
S. Shen;Chunyan Wang;Bei Cai;Huanmei Li;Yong Han;Tao Wang;H. Qin
中科院分区：
文献类型：
--
作者：
S. Shen;Chunyan Wang;Bei Cai;Huanmei Li;Yong Han;Tao Wang;H. Qin
以苯酚渣为原料成功制备了碳基固体酸（CSA）。表征结果表明，该固体酸催化剂主要由四个组成单元组成：缩合芳香碳片、活性基团（包括单键so3h、单键cooh和酚OH）、侧链（包括单键ch3和单键doch3）和桥键（包括单键do单键、单键ch2单键、单键ch2单键ch2单键、单键ch2单键ch2单键、单键ch2单键ch2单键、单键ch2单键ch2单键、单键ch2单键ch2单键）作为芳香团簇之间的中间体。除了单键so3h外，大多数这些构建块都可以从酚残基的相应部分中得到。脂肪侧链已被证明可以大大提高碳前体的磺化活性，促进纤维素水解的催化性能，并且碳基催化剂磺化1 h的催化活性与磺化时间较长的催化剂几乎相同。然而，它们的疏水性和位阻在一定程度上降低了磺酸基的利用效率。
Carbon-based solid acid (CSA) was successfully prepared using phenolic residue as starting material. The characterization results indicate that such solid acid catalyst mainly consists of four building blocks: the condensed aromatic carbon sheets, the active groups (including single bondSO3H, single bondCOOH and phenolic OH), the side chains (including single bondCH3and single bondOCH3) and the bridge linkages (including single bondOsingle bond, single bondCH2single bond, single bondCH2single bondCH2single bond, and single bondOCH2single bond) acting as the intermediates between aromatic clusters. Most of these building blocks, except for the single bondSO3H, could be derived from the corresponding part of the phenolic residue. Aliphatic side chains have been demonstrated to greatly improve the sulfonation activity of carbon precursor and promote the catalytic performance in cellulose hydrolysis, and the carbon-based catalyst sulfonated for just 1 h could exhibit almost similar catalytic activity compared with the catalyst sulfonated for a longer time. However, their hydrophobicity and steric hindrance reduced the utilization efficiency of the sulfonic acid groups to a certain extent.