Apparatus for reducing dibenzodioxin emissions and dibenzofuran emissions from transition metal-containing catalyzers
    8.
    发明授权
    Apparatus for reducing dibenzodioxin emissions and dibenzofuran emissions from transition metal-containing catalyzers 有权
    用于从含过渡金属的催化剂中还原二苯并二恶英排放和二苯并呋喃排放的装置

    公开(公告)号:US08173074B2

    公开(公告)日:2012-05-08

    申请号:US12355930

    申请日:2009-01-19

    申请人: Andreas Döring

    发明人: Andreas Döring

    IPC分类号: B01D53/34 F01N3/10

    摘要: A device for reducing the emission of polychlorinated dibenzodioxins (PCDD) and polychlorinated dibenzofurans (PCDF) from transition metal-containing catalyzers for selective catalytic reduction of nitric oxides in the exhaust gas of an internal combustion engine by means of ammonia and/or reducing agents which split off ammonia. At least one catalyzer for oxidizing hydrocarbon-containing PCDD precursor substances and PCDF is arranged upstream of the at least one transition metal-containing SCR catalyzer and/or at least one catalyzer for degrading precursor substances for degrading the polychlorinated dibenzodioxins and/or polychlorinated dibenzofurans is arranged downstream of the at least one transition metal-containing catalyzer. The at least one catalyzer for degrading PCDD and PCDF and/or the at least one catalyzer for oxidizing hydrocarbon-containing precursor substances thereof are/is additionally active for the reduction of nitric oxides by means of ammonia.

    摘要翻译: 一种用于从含过渡金属的催化剂中减少多氯二苯并二恶英(PCDD)和多氯二苯并呋喃(PCDF)的排放的装置,用于通过氨和/或还原剂选择性地催化还原内燃机废气中的一氧化氮 分解氨。 用于氧化含烃PCDD前体物质和PCDF的至少一种催化剂被布置在至少一种含过渡金属的SCR催化剂的上游,和/或至少一种用于降解前述物质的催化剂以降解多氯二苯并二恶英和/或多氯二苯并呋喃是 布置在所述至少一种含过渡金属的催化剂的下游。 用于降解PCDD和PCDF的至少一种催化剂和/或用于氧化含烃前体物质的至少一种催化剂对于通过氨还原一氧化氮是另外有活性的。

    Ni catalysts and methods for alkane dehydrogenation
    10.
    发明授权
    Ni catalysts and methods for alkane dehydrogenation 有权
    镍催化剂和烷烃脱氢方法

    公开(公告)号:US07674944B2

    公开(公告)日:2010-03-09

    申请号:US11786573

    申请日:2007-04-11

    申请人: Yumin Liu

    发明人: Yumin Liu

    IPC分类号: C07C5/333 C07C21/00

    摘要: Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), yttrium (Y), zinc (Zn), zirconium (Zr), or aluminum (Al), or a compound containing one or more of such element(s). In preferred embodiments, the catalyst is a supported catalyst, the alkane is selected from the group consisting of ethane, propane, isobutane, n-butane and ethyl chloride, molecular oxygen is co-fed with the alkane to a reaction zone maintained at a temperature ranging from about 250° C. to about 350° C., and the ethane is oxidatively dehydrogenated to form the corresponding alkene with an alkane conversion of at least about 10% and an alkene selectivity of at least about 70%.

    摘要翻译: 公开了烷烃氧化脱氢的催化剂和方法。 本发明的催化剂通常包括(i)镍或含镍化合物和(ii)钛(Ti),钽(Ta),铌(Nb),铪(Hf),钨(W)中的至少一种或多种 ),钇(Y),锌(Zn),锆(Zr)或铝(Al),或含有这些元素中的一种或多种的化合物。 在优选的实施方案中,催化剂是负载催化剂,烷烃选自乙烷,丙烷,异丁烷,正丁烷和乙基氯,分子氧与烷烃共同进料至维持在温度 范围为约250℃至约350℃,并且乙烷被氧化脱氢以形成相应的烯烃,烷烃转化率为至少约10%,烯烃选择性为至少约70%。