碳纳米管/氧化硅整体式复合材料的制备及其乙苯氧化脱氢性能(英文)

Supported carbon nanotubes on SiO_2 spheres as robust monolithic catalysts for the oxidative dehydrogenation of ethylbenzene

以商业的氧化硅球为载体,采用化学气相沉积的方法将碳纳米管均匀地固载在宏观氧化硅球表面,成功地制备出一种新型的碳纳米管/氧化硅整体式复合材料,并考察了该复合材料在乙苯氧化脱氢制苯乙烯反应中的催化性能。与商业的粉末碳管相比,该复合材料能够有效地克服粉末碳管在固定床反应器中使用时产生的压力降。该整体式复合材料在乙苯氧化脱氢制苯乙烯反应中,具有较高的稳定性和苯乙烯收率,在催化领域中具有潜在的应用价值。

Novel carbon nanotube （CNT）/SiO2 monolithic catalysts for the oxidative dehydrogenation of ethylbenzene to styrene were synthesized by immobilizing CNTs onto commercial SiO2 spheres.The CNTs completely cover the surface of the SiO2 spheres,and the catalysts exhibit an improved performance with a higher styrene yield and selectivity,and a higher ethylbenzene conversionthan commercial CNT powder.The catalysts also have a high mechanical strength and a diameter of 4 mm,which can decrease the pressure drop in the fixed bed reactor and also decrease the mass transfer resistance compared with a commercial CNT powder.