燃料电池型反应器中苯氧化制备苯酚

Oxidation of Benzene to Phenol in Fuel Cell Reactor

在氢氧燃料电池型反应器中进行苯氧化制备苯酚的研究。分别以石墨、炭黑和碳纳米管作为阴极催化材料,以聚四氟乳液为粘合剂,通过热压法制成催化电极,并用于苯氧化制备苯酚。结果表明:石墨活性过低、碳纳米管活性高,但苯酚的累计生成量很低,说明生成苯酚的电流效率低;炭黑作为阴极催化剂时,电流值和苯酚的累计生成量均较高,即炭黑较适宜用作氢氧燃料电池苯氧化制备苯酚的阴极催化剂。另外,较高氧气操作分压有利于苯酚的生成。

Phenol was synthesized in fuel cell reactor through oxidation of benzene. Electrodes were manufactured by hot press with graphite, carbon black and carbon nanotubes as catalysis materials respectively. These electrodes were used as cathode for the hydroxylation of benzene to phenol. The results showed that graphite was inactive, carbon nanotubes demonstrated high activity but with Poor accumulation of phenol, which is indicative of low current efficient about phenol. In contrast, both current and the phenol accumulation were higher when carbon black was used as cathode material. The above result reveals that carbon black is a suitable cathode catalyst for the oxidation of benzene to phenol in fuel cell reactor. Additionally, higher partial pressure of oxygen is favorable to the formation of phenol in fuel cell reactor.