Abstract:
Described herein is a supported catalyst for a liquid-phase reaction, the supported catalyst comprising a perovskite support comprising A-site species and B-site species and a catalytic component on a surface of the perovskite support. Also described herein is a method for tuning the selectivity of a supported catalyst. [Fig.5]
Abstract:
The present invention provides a reactor system comprising: - one or more purification zones comprising an absorbent which comprises silver, an alkali or alkaline earth metal, and a support material having a surface area of more than 20 m2/g, and - a reaction zone comprising a catalyst, which reaction zone is positioned downstream from the one or more purification zones; an absorbent; a process for reacting a feed comprising one or more feed components; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine.
Abstract:
A carrier for an ethylene epoxidation catalyst is provided that includes an alumina first component and a mixed metal oxide of alumina second component. The mixed metal oxide of alumina second component comprises a corundum lattice structure having a plurality of O-Al-O bonds, wherein an Al atom of at least one O-Al-O bond of the plurality of O-Al-O bonds, but not all of the plurality of O-Al-O bonds, is replaced with a divalent or trivalent transition metal selected from the group consisting of scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni) copper (Cu), and zinc (Zn). A catalyst containing the carrier, as well as a process for the epoxidation of ethylene using the catalyst are also disclosed.
Abstract:
A carrier for an ethylene epoxidation catalyst is provided that includes an alumina first component and a mixed metal oxide of alumina second component. The mixed metal oxide of alumina second component comprises a corundum lattice structure having a plurality of O-Al-O bonds, wherein an Al atom of at least one O-Al-O bond of the plurality of O-Al-O bonds, but not all of the plurality of O-Al-O bonds, is replaced with a divalent or trivalent transition metal selected from the group consisting of scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni) copper (Cu), and zinc (Zn). A catalyst containing the carrier, as well as a process for the epoxidation of ethylene using the catalyst are also disclosed.
Abstract:
Processes for the catalytic conversion of hydrocarbons to carbon monoxide and hydrogen employing new chromium-based catalysts are disclosed. One highly active and selective catalyst system, providing greater than 95 % CH4 conversion, and 97-98 % selectivity to CO and H2, is a chromium-containing catalyst consisting of a CoCr2O4 cubic spinel precursor dispersed in a chromium oxide matrix. Some other preferred catalysts compositions comprise nickel-chromium containing and rare earth-chromium containing compounds.
Abstract translation:公开了使用新的铬基催化剂将烃催化转化成一氧化碳和氢气的方法。 提供大于95%的CH 4转化率和97至98%对CO和H 2的选择性的一种高活性和选择性的催化剂体系是由分散在氧化铬基体中的CoCr 2 O 4立方尖晶石前体组成的含铬催化剂。 一些其它优选的催化剂组合物包含含镍铬和含稀土铬的化合物。
Abstract:
Processes and a new family of chromium-based catalysts for the catalytic conversion of hydrocarbons to carbon monoxide and hydrogen are disclosed. One highly active and selective catalyst system, providing greater than 95% CH>4 2 2 4
Abstract:
Zero-Rare Earth Metal (ZREM) and Zero-platinum group metals (ZPGM) compositions of varied binary spinel oxides are disclosed as oxygen storage material (OSM) to be used within TWC systems. The ZREM-ZPGM OSM systems comprise binary non-Cu spinel oxides of Co-Fe, Fe-Mn, Co-Mn, or Mn-Fe such as Co0.2Fe2.8O4, FeMn2O4, CoMn2O4, and Mn0.5Fe2.5O4. The oxygen storage capacity (OSC) property associated with the non-Cu ZREM-ZPGM OSM systems is determined employing isothermal OSC oscillating condition testing. Further, the OSC test results compare the OSC properties of a ZREM-ZPGM reference OSM system including a Cu-Mn binary spinel oxide and PGM reference catalysts including Ce-based OSMs. The non-Cu spinel oxides ZREM-ZPGM OSM systems exhibit significantly improved OSC properties compared to Ce-based OSM PGM reference systems.
Abstract:
The invention relates to a photo-electrocatalyst comprising a functionalised semiconductor, a method of preparing the photo-electrocatalyst and its use in a photo- electrochemical cell for purposes such as generating electricity. The functionalised semiconductor of the photo-electrocatalyst is typically chosen from the group comprising silicon, lll-V type semi-conductors, II-VI semiconductors, or oxide semiconductors.
Abstract:
A process is provided for use in the conversion of alkanes into alkylene oxides, having particular utility in the conversion of propane to form propylene oxide, using a lanthanide-promoted, supported, silver catalyst prepared via precipitation. A preferred embodiment uses silver nitrate and lanthanum nitrate to form the catalyst on a BaCO3 support.