Chemical Vapor Deposition Routes for Fluorine and Sulfur-containing Activated Carbon Acid Catalysts: Comparison of Fluorination Methods

Abstract

Fluorination of nanoporous activated carbon and its subsequent modification with sodium sulfide, which leads to the introduction of sulfur-containing groups in the carbon matrix containing fluorine, was carried out. After oxidation with hydrogen peroxide, sulfo groups are formed in the surface layer of activated carbon, i.e., in this way, it is possible to obtain samples that have both fluorine-and sulfur-containing functional groups. As a result of this work, active and stable catalysts of the reactions catalyzed by acids were obtained. They have a fairly high catalytic activity and thermal stability. When testing the obtained samples in the temperature range up to 250°C under the catalytic 2-propanol dehydration, the yield of propylene remains unchanged for each cycle, the temperature of the dehydration reaction does not change, the activity remains stable for at the least three catalysis cycles, with no deactivation of catalysts.