Gas-Phase Process for Growing Carbon Nanotubes Utilizing Sequential Multiple Catalyst Injection
    21.
    发明申请
    Gas-Phase Process for Growing Carbon Nanotubes Utilizing Sequential Multiple Catalyst Injection 审中-公开
    使用顺序多催化剂注入生长碳纳米管的气相工艺

    公开(公告)号:US20080299029A1

    公开(公告)日:2008-12-04

    申请号:US11609984

    申请日:2006-12-13

    IPC分类号: D01F9/12 B01J8/08

    摘要: This invention relates generally to a method and apparatus for making carbon nanotubes from a flowing gaseous carbon-containing feedstock, such as CO, at superatmospheric pressure and at temperatures between about 500° C. and about 2000° C. utilizing a reactor wherein the flowing carbon-containing feedstock sequentially passes multiple points of catalyst injection, where the catalyst is provided by the decomposition of one or more catalyst precursor species, such as Fe(CO)5. In one embodiment, a catalyst cluster nucleation agency is employed to facilitate metal catalyst cluster formation. The reactor permits broad control over the reaction conditions, and enables addition of controlled amounts of catalyst over the length of the conduit reactor. The invention provides higher catalyst productivity because more catalyst precursor is used to form small active catalyst clusters versus forming catalyst clusters that grow along the reactor into large clusters, which are inactive for carbon nanotube production.

    摘要翻译: 本发明一般涉及一种用于在超大气压和约500℃至约2000℃之间的温度下由来自流动气态含碳原料(例如CO)制备碳纳米管的方法和装置,其中使用反应器,其中流动 含碳原料依次通过催化剂注入的多个点,其中通过一种或多种催化剂前体物质如Fe(CO)5的分解提供催化剂。 在一个实施方案中,使用催化剂簇成核剂来促进金属催化剂簇形成。 反应器允许对反应条件的广泛控制,并且能够在导管反应器的长度上添加受控量的催化剂。 本发明提供更高的催化剂生产率,因为使用更多的催化剂前体形成小的活性催化剂簇,而不是形成沿着反应器生长成对于碳纳米管生产无活性的大簇的催化剂簇。