以SBA-15为硬模板剂,采用溶剂挥发诱导煤基沥青烯与聚丙烯腈(PAN)自组装,制备了氮掺杂有序介孔炭(NOMC)。通过CO_(2)活化,进一步提升NOMC的比表面积及电容性能。结果表明,SBA-15、沥青烯、PAN的比例为1∶1.2∶4.8时,800℃炭化所得炭材...以SBA-15为硬模板剂,采用溶剂挥发诱导煤基沥青烯与聚丙烯腈(PAN)自组装,制备了氮掺杂有序介孔炭(NOMC)。通过CO_(2)活化,进一步提升NOMC的比表面积及电容性能。结果表明,SBA-15、沥青烯、PAN的比例为1∶1.2∶4.8时,800℃炭化所得炭材料成炭率与有序性均较高。900℃活化后其比表面积、孔容及孔径依次为602.1 m 2/g,0.426 cm 3/g,3.808 nm,且比电容达到127.2 F/g,相比未活化,提升了41.8%。展开更多
Dehydrogenation of propane on Pt or Pt Sn catalyst over Al2O3 or SBA-15 support was investigated. The catalysts were characterized by CO-pulse chemisorption, thermogravimetry, temperature-programmed-reduction of H2,an...Dehydrogenation of propane on Pt or Pt Sn catalyst over Al2O3 or SBA-15 support was investigated. The catalysts were characterized by CO-pulse chemisorption, thermogravimetry, temperature-programmed-reduction of H2,and diffuse reflectance infrared Fourier transform spectroscopy of absorbed CO. The results show that the platinum species is in oxidation state in the catalyst on Al2O3 support, so the catalyst must be reduced in H2 before dehydrogenation reaction. Addition of Sn improves the Pt dispersion, but the catalyst deactivates rapidly because of the coke formation. The interaction of Pt and Al2O3 is strong. On SBA-15 support, the platinum species is completely reduced to Pt0 in the calcination process, so the reduction is not needed. Addition of Sn improves the activity and selectivity of the catalyst. The interaction of Pt and SBA-15 is weak, so it is easy for Pt particles to sinter.展开更多
基金supported by the Science & Technology Support Plan Projects of Sichuan Province (2016GZ0371)National Natural Science Foun-dation of China (NNSFC,21476145,21506111)~~
文摘以SBA-15为硬模板剂,采用溶剂挥发诱导煤基沥青烯与聚丙烯腈(PAN)自组装,制备了氮掺杂有序介孔炭(NOMC)。通过CO_(2)活化,进一步提升NOMC的比表面积及电容性能。结果表明,SBA-15、沥青烯、PAN的比例为1∶1.2∶4.8时,800℃炭化所得炭材料成炭率与有序性均较高。900℃活化后其比表面积、孔容及孔径依次为602.1 m 2/g,0.426 cm 3/g,3.808 nm,且比电容达到127.2 F/g,相比未活化,提升了41.8%。
文摘Dehydrogenation of propane on Pt or Pt Sn catalyst over Al2O3 or SBA-15 support was investigated. The catalysts were characterized by CO-pulse chemisorption, thermogravimetry, temperature-programmed-reduction of H2,and diffuse reflectance infrared Fourier transform spectroscopy of absorbed CO. The results show that the platinum species is in oxidation state in the catalyst on Al2O3 support, so the catalyst must be reduced in H2 before dehydrogenation reaction. Addition of Sn improves the Pt dispersion, but the catalyst deactivates rapidly because of the coke formation. The interaction of Pt and Al2O3 is strong. On SBA-15 support, the platinum species is completely reduced to Pt0 in the calcination process, so the reduction is not needed. Addition of Sn improves the activity and selectivity of the catalyst. The interaction of Pt and SBA-15 is weak, so it is easy for Pt particles to sinter.
