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    • 1. 发明授权
    • Catalyst and process for oxidation and removal of nitrogen oxides (NOx) from combustion gases
    • 从燃烧气体氧化和除去氮氧化物(NOx)的催化剂和方法
    • US06875409B1
    • 2005-04-05
    • US10038120
    • 2001-11-09
    • Bing ZhouLap-Keung LeeNaresh J. Suchak
    • Bing ZhouLap-Keung LeeNaresh J. Suchak
    • B01J23/00
    • B01J23/002B01D53/944B01D2253/112B01D2255/1021B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20761B01D2255/91B01J23/78B01J23/83B01J23/894B01J23/8986B01J37/0201B01J37/34B01J2523/00B01J2523/17B01J2523/3706B01J2523/72B01J2523/25
    • A bi-functional oxidation catalyst and process for catalytic oxidation and removal of nitrogen oxides (NOx) from combustion gases derived from combustion of carbonaceous fuels such as coal, oil, or natural gas. The bi-functional catalyst includes adsorption and oxidation function metal oxides provided in adjacent close intimate contact by utilizing a binding agent, such as carboxylic acid and calcining to provide a metal oxide complex having a crystalline form. Such nitrogen oxides (NOx) contained in the combustion gases are initially catalytically oxidized to at least about 50 vol % NO2 and some higher oxides by contact with the bi-functional catalyst at 170-550° F. temperature. The combustion gas containing the partially oxidized NOx is then preferably further chemically oxidized by being mixed with a chemical oxidant such as ozone (O3) in a molar ratio of the chemical oxidant3 to NOx in the range of 0.5:1-1.2:1 to produce higher oxides of nitrogen such as substantially N2O5. The further treated combustion gas containing the N2O5 is next scrubbed with a suitable scrubbing liquid such as water to effectively remove the nitrogen oxides (NOx) and produce a clean treated flue gas stream containing less than about 15 ppm nitrogen oxides and suitable for environmentally safe discharge to the atmosphere.
    • 一种双功能氧化催化剂和从燃烧碳,燃料如煤,油或天然气的燃烧产生的燃烧气体催化氧化和除去氮氧化物(NOx)的方法。 双功能催化剂包括通过利用粘合剂(例如羧酸)和煅烧以提供具有结晶形式的金属氧化物络合物在相邻紧密接触中提供的吸附和氧化功能金属氧化物。 包含在燃烧气体中的这种氮氧化物(NOx)在170-550°F温度下与双功能催化剂接触,最初催化氧化至至少约50vol%的NO 2和一些较高的氧化物。 含有部分氧化的NOx的燃烧气体然后优选通过与化学氧化剂例如臭氧(O 3)以化学氧化剂3与NOx的摩尔​​比在0.5:1-1.2:1的范围内混合而进一步化学氧化,以产生 较高的氮氧化物,例如基本上是N 2 O 5。 接下来用含有N2O5的处理过的燃烧气体用合适的洗涤液如水洗涤以有效去除氮氧化物(NOx)并产生含有小于约15ppm氮氧化物并且适于环境安全排放的清洁处理的烟道气流 到大气。
    • 4. 发明授权
    • Catalyst and process for direct catalystic production of hydrogen peroxide, (H2O2)
    • 用于直接催化生产过氧化氢(H 2 O 2)的催化剂和方法
    • US06168775A
    • 2001-01-02
    • US09140265
    • 1998-08-26
    • Bing ZhouLap-Keung Lee
    • Bing ZhouLap-Keung Lee
    • B01J2118
    • B01J37/0203B01J21/18B01J23/38B01J23/40B01J35/0013B01J37/0211C01B15/029
    • A particulate supported noble metal phase-controlled catalyst material having 5-1000 &mgr;m surface area of 50&mgr;500 m2/gm is provided for use in direct catalytic production of hydrogen peroxide (H2O2) product from hydrogen and oxygen-containing feedstreams. The catalyst is made by depositing phase controlled crystals of a noble metal such as palladium on a suitable particulate support material such as carbon black, by utilizing a precursor solution of the metal and a suitable control ionic polymer having molecular weight of 300-8000 such as sodium polyacrylate in a selected metal to polymer molar ratio of 1:0.1 to 1:10, which procedure provides desired phase control of the noble metal atoms to form widely dispersed minute noble metal crystals on the support material. The invention includes methods for making the catalyst, and also a process for utilizing the catalyst to directly produce high yields of hydrogen peroxide (H2O2) product from hydrogen and oxygen-containing gaseous feedstreams.
    • 提供具有5-500m 2 / gm的5-1000mum表面积的颗粒状负载的贵金属相控催化剂材料,用于从氢气和含氧进料流直接催化生产过氧化氢(H 2 O 2)产物。 通过使用金属的前体溶液和分子量为300-8000的合适的对照离子聚合物(如分子量为300-8000),将贵金属如钯的相控晶体沉积在合适的颗粒载体材料如炭黑上来制备催化剂,例如 聚丙烯酸钠以选择的金属与聚合物的摩尔比为1:0.1至1:10,该方法提供贵金属原子的期望的相位控制,以在载体材料上形成广泛分散的微小贵金属晶体。 本发明包括制备催化剂的方法,以及利用催化剂从氢气和含氧气态进料流直接产生高产率的过氧化氢(H 2 O 2)产物的方法。