In the present work, Ni Ce catalyst was used for the preparation of carbon nanotubes(CNTs) in the atmosphere of partial oxidation of methane(POM). Mainly growing on quartz wool or wall of reactor, the bulk CNTs were o...In the present work, Ni Ce catalyst was used for the preparation of carbon nanotubes(CNTs) in the atmosphere of partial oxidation of methane(POM). Mainly growing on quartz wool or wall of reactor, the bulk CNTs were obtained. Probably CNTs were synthesized by two routes due to the typical reaction conditions of POM. One was that CNTs were produced from the decomposition of CH 4 on the Ni particles. After transported out of the catalyst zone by blowing of feedgas, CNTs adhered to quartz wool or the wall of reactor. Predominately, the other way was that firstly syngas was produced from POM reaction and then CNTs grew from disproportionation of CO in presence of hydrogen. A little remaining oxygen in effluent could remove the other morphologic carbon, so CNTs were easily opened and purified at the same time of growth. This research maybe arouse us to assemble the continuous process of POM and preparation of CNTs. CNTs were applied to be negative materials for lithium battery. The reversible electrical capacity of simulative lithium battery can be increased ca. 20% with adding 10%(in mass fraction) carbon nanotubes into natural graphite. [WT5HZ]展开更多
设计了将脉管制冷机与自复叠制冷循环相结合的新型天然气液化流程,运用HYSYS软件对该流程进行模拟计算。模拟结果表明,该新型天然气液化流程的比耗功为29222 k J/kmol,液化率为85.5%。当天然气入口压力从6.0 MPa降低到4.8 MPa时,液化系...设计了将脉管制冷机与自复叠制冷循环相结合的新型天然气液化流程,运用HYSYS软件对该流程进行模拟计算。模拟结果表明,该新型天然气液化流程的比耗功为29222 k J/kmol,液化率为85.5%。当天然气入口压力从6.0 MPa降低到4.8 MPa时,液化系统的比耗功增加了13%。当脉管制冷机入口温度为-140℃时,液化流程的比耗功最小,为24640 k J/kmol。展开更多
文摘In the present work, Ni Ce catalyst was used for the preparation of carbon nanotubes(CNTs) in the atmosphere of partial oxidation of methane(POM). Mainly growing on quartz wool or wall of reactor, the bulk CNTs were obtained. Probably CNTs were synthesized by two routes due to the typical reaction conditions of POM. One was that CNTs were produced from the decomposition of CH 4 on the Ni particles. After transported out of the catalyst zone by blowing of feedgas, CNTs adhered to quartz wool or the wall of reactor. Predominately, the other way was that firstly syngas was produced from POM reaction and then CNTs grew from disproportionation of CO in presence of hydrogen. A little remaining oxygen in effluent could remove the other morphologic carbon, so CNTs were easily opened and purified at the same time of growth. This research maybe arouse us to assemble the continuous process of POM and preparation of CNTs. CNTs were applied to be negative materials for lithium battery. The reversible electrical capacity of simulative lithium battery can be increased ca. 20% with adding 10%(in mass fraction) carbon nanotubes into natural graphite. [WT5HZ]
文摘设计了将脉管制冷机与自复叠制冷循环相结合的新型天然气液化流程,运用HYSYS软件对该流程进行模拟计算。模拟结果表明,该新型天然气液化流程的比耗功为29222 k J/kmol,液化率为85.5%。当天然气入口压力从6.0 MPa降低到4.8 MPa时,液化系统的比耗功增加了13%。当脉管制冷机入口温度为-140℃时,液化流程的比耗功最小,为24640 k J/kmol。
