Photocatalytic materials with a composite photocatalyst of a metal oxide impregnated with elemental metal particles, can be embedded into a hydrophilic polymer having pores with diameters of less than 2 nm, to provide a useful water remediation and/or purification product. The metal oxide may be WO.sub.3, Ce.sub.2, Bi.sub.2O.sub.3, NiO, TiO.sub.2, and/or ZnO, and the elemental metal particles, impregnated or compounded into the metal oxide, may be Fe, Co, Ni, Cu, Ag, Ce, Mn, Mo, V, Bi, Sn, W, Nb, Pd, and/or Pt. The photocatalytic materials may be easily removed and/or retrieved after use, and can effectively combat both chemical and biological contamination and/or fouling of water as well as the membranes composed of the photocatalytic material.

Photocatalytic materials with a composite photocatalyst of a metal oxide impregnated with elemental metal particles, can be embedded into a hydrophilic polymer having pores with diameters of less than 2 nm, to provide a useful water remediation and/or purification product. The metal oxide may be WO.sub.3, Ce.sub.2, Bi.sub.2O.sub.3, NiO, TiO.sub.2, and/or ZnO, and the elemental metal particles, impregnated or compounded into the metal oxide, may be Fe, Co, Ni, Cu, Ag, Ce, Mn, Mo, V, Bi, Sn, W, Nb, Pd, and/or Pt. The photocatalytic materials may be easily removed and/or retrieved after use, and can effectively combat both chemical and biological contamination and/or fouling of water as well as the membranes composed of the photocatalytic material.

The present invention relates a method of making a catalyst support comprising at least homogeneously distributed titanium dioxide and alumina and to a catalyst support obtained according to this method.

The present invention relates a method of making a catalyst support comprising at least homogeneously distributed titanium dioxide and alumina and to a catalyst support obtained according to this method.

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogeneous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed.

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogeneous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed.

Disclosed is method for removing carbonyl sulphide and/or carbon disulphide from a sour gas stream. The method comprises subjecting the gas stream to simultaneous contact with an absorption liquid, such as an aqueous amine solution, and with a catalyst suitable for hydrolyzing carbonyl sulphide and/or carbon disulphide. To this end, the invention also provides a reactor system wherein both an absorption liquid and a catalyst are present. In a preferred embodiment, the catalyst is a heterogeneous catalyst present on or in an absorption column, either coated on the trays of a column with trays, or contained in the packing of a packed column.

Disclosed is method for removing carbonyl sulphide and/or carbon disulphide from a sour gas stream. The method comprises subjecting the gas stream to simultaneous contact with an absorption liquid, such as an aqueous amine solution, and with a catalyst suitable for hydrolyzing carbonyl sulphide and/or carbon disulphide. To this end, the invention also provides a reactor system wherein both an absorption liquid and a catalyst are present. In a preferred embodiment, the catalyst is a heterogeneous catalyst present on or in an absorption column, either coated on the trays of a column with trays, or contained in the packing of a packed column.

Disclosed is a catalyst which can be used in the process for producing hydrogen by decomposing ammonia, can generate heat efficiently in the interior of a reactor without requiring excessive heating the reactor externally, and can decompose ammonia efficiently and steadily by utilizing the heat to produce hydrogen. Also disclosed is a technique for producing hydrogen by decomposing ammonia efficiently utilizing the catalyst. Specifically disclosed is a catalyst for use in the production of hydrogen, which is characterized by comprising an ammonia-combusting catalytic component and an ammonia-decomposing catalytic component. Also specifically disclosed is a catalyst for use in the production of hydrogen, which is characterized by comprising at least one metal element selected from the group consisting of cobalt, iron, nickel and molybdenum.

Disclosed is a catalyst which can be used in the process for producing hydrogen by decomposing ammonia, can generate heat efficiently in the interior of a reactor without requiring excessive heating the reactor externally, and can decompose ammonia efficiently and steadily by utilizing the heat to produce hydrogen. Also disclosed is a technique for producing hydrogen by decomposing ammonia efficiently utilizing the catalyst. Specifically disclosed is a catalyst for use in the production of hydrogen, which is characterized by comprising an ammonia-combusting catalytic component and an ammonia-decomposing catalytic component. Also specifically disclosed is a catalyst for use in the production of hydrogen, which is characterized by comprising at least one metal element selected from the group consisting of cobalt, iron, nickel and molybdenum.