Nitrogen plasma treatment effect on GS-CNFs （graphene seeted vertically aligned carbon nanofibers） has been studied. GS-CNFs were grown on nickel coated cupper substrates by DC-plasma CVD （chemical vapor deposition...Nitrogen plasma treatment effect on GS-CNFs （graphene seeted vertically aligned carbon nanofibers） has been studied. GS-CNFs were grown on nickel coated cupper substrates by DC-plasma CVD （chemical vapor deposition） at relatively low temperature. GS-CNFs were studied by SEM （scanning electron microscopy）, HR-TEM （high-resolution transmission electron microscopy）, XPS and Raman measurements. GS-CNFs are composed of cylindrical shaped having pure graphite sheets with about 5 μm length and nanometer size tips and roots diameter. Nitrogen plasma treatment causes nitrogen chemical etching on the graphene seeted carbon nanofibers were disordered its fine shape and increase the graphetization due to nitrogen incorporation.展开更多
为替代污染严重的电石法制乙炔工艺,寻求一条洁净化乙炔生产工艺,利用100 k W直流等离子体装置进行了焦化厂焦炉煤气与解析气制乙炔的研究,分析了原料气流量、氢烷比、反应腔体直径对反应指标的影响。结果表明,随着原料气流量增大,焦炉...为替代污染严重的电石法制乙炔工艺,寻求一条洁净化乙炔生产工艺,利用100 k W直流等离子体装置进行了焦化厂焦炉煤气与解析气制乙炔的研究,分析了原料气流量、氢烷比、反应腔体直径对反应指标的影响。结果表明,随着原料气流量增大,焦炉煤气和解析气主要指标变化趋势相同,CH_4转化率、乙炔选择性、乙炔收率提高,能耗下降,其中焦炉煤气CH_4转化率为50.13%~62.95%,乙炔选择性为60.1%~71.3%,乙炔收率为30.1%~44.8%;解析气CH_4转化率为56.65%~69.56%,乙炔选择性为70.05%~83.33%,乙炔收率为39.6%~57.9%。随着氢烷比的提高,CH_4转化率、乙炔选择性和收率下降,且解析气中CO_2和O_2含量较高,促进了CH_4裂解,使解析气反应结果较好,CH_4转化率最高为69.56%,乙炔选择性83.33%,乙炔收率57.96%,乙炔能耗最低为13.66 k Wh/kg。反应腔体直径为16 mm时,反应结果优于直径17 mm。展开更多
文摘Nitrogen plasma treatment effect on GS-CNFs （graphene seeted vertically aligned carbon nanofibers） has been studied. GS-CNFs were grown on nickel coated cupper substrates by DC-plasma CVD （chemical vapor deposition） at relatively low temperature. GS-CNFs were studied by SEM （scanning electron microscopy）, HR-TEM （high-resolution transmission electron microscopy）, XPS and Raman measurements. GS-CNFs are composed of cylindrical shaped having pure graphite sheets with about 5 μm length and nanometer size tips and roots diameter. Nitrogen plasma treatment causes nitrogen chemical etching on the graphene seeted carbon nanofibers were disordered its fine shape and increase the graphetization due to nitrogen incorporation.
文摘为替代污染严重的电石法制乙炔工艺,寻求一条洁净化乙炔生产工艺,利用100 k W直流等离子体装置进行了焦化厂焦炉煤气与解析气制乙炔的研究,分析了原料气流量、氢烷比、反应腔体直径对反应指标的影响。结果表明,随着原料气流量增大,焦炉煤气和解析气主要指标变化趋势相同,CH_4转化率、乙炔选择性、乙炔收率提高,能耗下降,其中焦炉煤气CH_4转化率为50.13%~62.95%,乙炔选择性为60.1%~71.3%,乙炔收率为30.1%~44.8%;解析气CH_4转化率为56.65%~69.56%,乙炔选择性为70.05%~83.33%,乙炔收率为39.6%~57.9%。随着氢烷比的提高,CH_4转化率、乙炔选择性和收率下降,且解析气中CO_2和O_2含量较高,促进了CH_4裂解,使解析气反应结果较好,CH_4转化率最高为69.56%,乙炔选择性83.33%,乙炔收率57.96%,乙炔能耗最低为13.66 k Wh/kg。反应腔体直径为16 mm时,反应结果优于直径17 mm。
