Carbon Solid Acids Prepared from the Surface-Brominated Nanoporous Activated Carbons

In this chapter, we consider bromination with KBr3 and Br2 to prepare precursors to sulfonated nanoporous activated carbons (NACs). Sulfonated NACs were prepared and characterized by N2 adsorption, TGA, TPD MS, TPD IR, elemental analysis, and also using SEM, TEM, HRTEM, and SAED. The majority of sulfonated NACs are efficient catalysts for the 2-propanol dehydration to propylene. However, they showed a significant difference in the temperature at 50 and 100% conversion of 2-propanol to propylene. These parameters depend on the bromination method, surface chemistry, and used NACs. The best catalytic performance was found for the sulfonated NACs covered with carboxylic groups and prepared by pre-bromination with Br2.