Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (1): 114-122.DOI: 10.1016/S1872-2067(10)60282-3

• Research papers • Previous Articles     Next Articles

Preparation of a Carbon-Silica Mesoporous Composite Functionalized with Sulfonic Acid Groups and Its Application to the Production of Biodiesel

FANG Lin, ZHANG Kun, LI Xiaohong, WU Haihong, WU Peng*   

  1. Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, China
  • Received:2011-08-10 Revised:2011-09-19 Online:2012-01-16 Published:2015-05-26

Abstract: A carbon-mesoporous silica (CS) composite functionalized with sulfonic acid (–SO3H) groups was prepared by controlled carbonization of sucrose impregnated in SBA-15 mesoporous silica and its subsequent sulfonation. The moderate vapor phase sulfonation of the CS composite with fuming sulfuric acid (H2SO4?20%SO3) was the key step in preparing the strong acid solid material (CS-SO3H). Structural analysis and reaction data revealed that sulfonic acid groups were successfully incorporated into the mesoporous CS composite, and the Brønsted acid site density was tunable from 0.09 to 0.70 mmol/g by tuning the carbon loading. The sample with 35 wt% carbon exhibited a remarkable catalytic activity for biodiesel production by the esterification of palmitic acid and the transesterification of soybean oil with methanol.

Key words: Solid acid, carbon, sulfonic acid group, biodiesel, mesoporous materials