摘要:
In a method and apparatus for selective catalytic oxidation of carbon monoxide, the gas mixture and an additionally added oxidizing gas are conducted through a reactor containing the catalyst. Oxidizing gas is added at several points along the mixed gas flow path with a controlled or regulated through flow volume. The mixed gas stream is cooled passively by static mixing structures located in the inlet area of the CO-oxidation reactor. By controlling exothermal CO oxidation along the reactor path, a very variable process guidance is provided, that can be adjusted to individual situations.
摘要:
A process is provided for production of substantially pure carbon dioxide from a CO2 off-gas stream from an ethylene glycol plant. Water is condensed from an off-gas stream which contains unsaturated hydrocarbons, saturated hydrocarbons, chlorinated hydrocarbons, carbon dioxide and water. The dewatered gas stream is subjected to catalytic oxidation in the presence of excess oxygen whereby the unsaturated hydrocarbons, saturated hydrocarbons and chlorinated hydrocarbons are oxidized producing an oxidation stream containing carbon dioxide, water and hydrochloric acid. The HCl is removed with an absorbent and substantially pure carbon dioxide is collected. The absorbent-contacted stream can be subjected to catalytic deoxidation in the presence of hydrogen to convert unoxidized oxygen introduced in the catalytic oxidation to water.
摘要:
A catalyst for the full oxidation of volatile organic compounds (VOC), particularly hydrocarbons, and of CO to CO2, comprising: a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to A14Cu24O41 (I), where A is Sr or a solid solution of Sr with alkaline-earth metals, alkaline metals, lanthanides; or a non-stoichiometric crystalline compound conventionally designated by a formula which corresponds to B4Cu5O10 (II), where B is Ca or a solid solution of Ca with alkaline-earth metals, alkaline metals, lanthanides; or mixtures thereof; and in that it is prepared in a form which has a large specific surface area, preferably larger than 25 m2/g; a method for preparing the catalysts; their use in methods for the full oxidation of VOC and of CO to CO2; and the oxidation methods.
摘要:
The present invention relates to the preparation of novel catalysts made from transition metal compounds and “tridentate” 4,5-diphosphinoacridine ligands (“acriphos”). The novel ligands employed herein are diphosphine compounds of 4,5-disubstituted acridine which coordinate transition metals in a three-fold way with the two phosphorus atoms and the acridine nitrogen. The invention also relates to the use of the novel catalysts for the catalysis of carbon monoxide conversion via the water-gas shift reaction (WGSR: CO+H2O→CO2+H2) and for the catalysis of the following reactions: hydroformylation, carbonylation, carboxylation, hydrogenation, hydrocyanogenation, hydrosilylation, polymerization, isomerization, cross-couplings and metathesis. The invention further relates to heretofore unknown syntheses of the 4,5-diphosphinoacridines through the reaction of 4,5-difluoroacridine with alkali metal phosphides [R2P−M+(M+═Li+, Na+, K+, Rb+, Cs+, preferably K+)] or through the reaction of 4,5-dibromoacridine with chlorophosphines (R2PCl) and magnesium, and to the preparation of 4,5-difluoroacridine and 4,5-dibromoacridine.
摘要翻译:本发明涉及由过渡金属化合物和“三齿”4,5-二磷酸吖啶配体(“acriphos”)制备的新型催化剂的制备。 本文中使用的新型配体是4,5-二取代吖啶的二膦化合物,其以三重方式与两个磷原子和吖啶氮配位过渡金属。 本发明还涉及新催化剂用于通过水煤气变换反应(WGSR:CO + H 2→CO 2 + H 2)催化一氧化碳转化的用途,并且用于催化下列反应:加氢甲酰化,羰基化, 羧化,氢化,氢氰化,氢化硅烷化,聚合,异构化,交联和复分解。 本发明还涉及通过4,5-二氟吖啶与碱金属磷化物[R2P-M +(M + = Li +,Na +,K +,Rb +,Cs +,优选K +)]的反应的4,5-二磷杂吖啶的未知合成,或 通过4,5-二溴吖啶与氯膦(R2PCl)和镁的反应,以及制备4,5-二氟吖啶和4,5-二溴吖啶。
摘要:
The invention provides a carbon monoxide conversion method for hydrogen-containing gas. The method comprises selective CO conversion in hydrogen-containing gas through contact of CO with steam and oxygen in the presence of a catalyst containing copper, alumina and zinc oxide.
摘要:
We have recently proposed special catalysts, Pt-supported zeolites, for the selective oxidation of carbon monoxide in reformed fuels from methanol or natural gas. They can be applied to polymer electrolyte fuel cells, of which Pt anode catalysts suffer serious poisoning by the trace amount of CO. In order to enhance the performance of the catalysts, the selective CO oxidation was examined over Pt—, Ru—, Pd—, Co—, and PtRu— supported zeolites in a large excess of H2 with the addition of a low concentration of oxygen. It was found that Pt, Ru, and PtRu supported on mordenite can oxidize CO much more selectively than a conventional Pt-supported alumina catalyst. Ru/mordenite showed the highest selectivity of approximately 100% at 200° C. with a certain flow rate of the reactant. Pt-Ru/mordenite exhibited fairly high selectivity of 90% over a wide flow rate condition even at 150° C. Analyses with IR and QCM methods indicated that the selective CO oxidation on Pt—Ru/mordenite can proceed by so-called bi-functional mechanism via the surface reaction between CO and O atoms adsorbed on adjacent Pt and Ru sites.
摘要:
Process for the preferential oxidation of carbon monoxide and/or CH3OH in a hydrogen containing process stream by contacting the process stream with a catalyst comprising gold on a support comprising non-reducible magnesium aluminium oxide in form of MgAl2O4 spinel.
摘要翻译:通过使工艺流与包含金的催化剂在包含MgAl 2 O 4尖晶石形式的不可还原的氧化镁的载体上接触来在含氢工艺流中优先氧化一氧化碳和/或CH 3 OH的方法。
摘要:
A process for burning coal to produce substantially pure hydrogen for use in fuel cells, together with “sequestration ready” carbon dioxide and a stream of oxygen depleted air for powering gas turbines, characterized by using a combination of two fluidized bed reactors and a third transfer line reactor, the first reactor being supplied with coal particles or “char” and fluidized with high temperature steam; the second reactor being fluidized with high temperature steam and the third reactor being fluidized by compressed air. Solids circulated among these three reactors include a mixture of materials containing calcium compounds (present as CaO, CaCO3 and mixtures thereof) and iron compounds (present as FeO, Fe2O3 and mixtures thereof). The coal is gasified by the steam in the presence of CaO to produce CaCO3 and relatively pure hydrogen for use in fuel cells per a CO2 acceptor process. Because only part of the coal char input to the first reactor is gasified to produce hydrogen, the remainder can be burned to supply thermal energy necessary to regenerate the CaCO3 back to CaO. Carbon in the middle bed fluidized bed reactor reacts with Fe2O3 in the third reactor and the temperature in the middle fluidized bed reactor is sufficiently high to decompose CaCO3 back into CaO.
摘要翻译:一种用于燃烧煤以生产用于燃料电池的基本上纯的氢的方法,以及“隔离准备好”的二氧化碳和用于为燃气轮机供电的耗氧空气流,其特征在于使用两个流化床反应器和第三次转移 第一反应器供应煤颗粒或“炭”并用高温蒸汽流化; 第二反应器用高温蒸汽流化,第三反应器被压缩空气流化。 在这三个反应器中循环的固体包括含有钙化合物(以CaO,CaCO 3及其混合物存在)和铁化合物(以FeO,Fe 2 O 3及其混合物存在)的材料的混合物。 煤在CaO的存在下被蒸汽气化以产生CaCO 3和相对纯的氢气,用于每个CO2受体过程的燃料电池。 由于仅输入到第一反应器的煤焦炭的一部分被气化以产生氢气,所以其余部分可被燃烧以提供再生CaCO3所需的热能回到CaO。 中间床流化床反应器中的碳与第三反应器中的Fe 2 O 3反应,中流化床反应器中的温度足够高以将CaCO3分解成CaO。
摘要:
In a method for the production of carbon dioxide, an oxygen-containing first process gas is flowed along a cathode side of a first oxygen selective ion transport membrane. The membrane is at operating conditions effective to transport a first permeate oxygen portion from the cathode side to an opposite anode side. A carbon-containing second process gas is flowed along the anode side at a flow rate effective to provide a stoichiometric surplus of oxygen on combination with the first permeate oxygen portion. A first mixture of a second process gas and the first permeate oxygen portion is combusted such that substantially all of the second process gas is converted into a second mixture of water and carbon dioxide. The carbon dioxide is separated from such second mixture.
摘要:
This invention relates to an improved process of producing hydrogen and carbon dioxide by the catalytical process of methanol reformation. The improvement resides in the use of catalysts made up substantially of metal oxides selected from the group consisting of Al2O3, TiO2, ZrO2 and ZnO, and which catalyst is in the form of a substantially cylindrical tablet having a maximum diameter in the range from 0.8 to 2.0 mm and a maximum height in the range of from 0.5 to 2.0 mm.
摘要翻译:本发明涉及通过甲醇改性的催化方法生产氢和二氧化碳的改进方法。 改进在于使用基本上由选自Al 2 O 3,TiO 2,ZrO 2和ZnO的金属氧化物制成的催化剂,并且该催化剂是基本上为圆柱形的片剂形式,其最大直径在0.8至 2.0毫米,最大高度范围为0.5至2.0毫米。