Preparation of a Carbon-Based Solid Acid with High Acid Density via a Novel Method

• 作者: Dulin Yin Qiong Xu Siyu Ouyang Xiangming Kuang
• 来源期刊: 材料科学与化学工程(英文)
• 学科: 化学
• 关键词: Solid Acid CATALYSTS PREPARATION BIOMASS KETALIZATION
• 年，卷（期）: clkxyhxgcyw_2014,（6）
• 页码范围: 4-8
• 页数: 5页
• 分类号: O6

摘要

A carbon-based solid acid with high acid density was successfully prepared using camphor tree branches as raw materials through a novel method including dilute sulfuric acid activation, carbonization in refluxing solvent and sulfonation. Physical characterization was detected to show that the carbon-based acid is amorphous with polycyclic aromatic carbon sheets attached plentiful -OH, -COOH, and -SO3H groups. The sulfonic acid density and total acid density of it reached 2.05 mmol·g-1 and 5.63 mmol·g-1, respectively by acid-base titration. As a solid acid catalyst, it showed excellent performance in the ketalization of cyclohexanone with glycol.