Abstract: A catalyst charge for ammonia oxidation, including the Andrussow process, comprises a first stage ammonia oxidation catalyst capable of oxidising 20 to 99% of designed ammonia throughput, to produce a first stage product gas comprising unreacted ammonia, oxygen and nitrogen oxides, and a second stage ammonia oxidation catalyst capable of completing the oxidation of unreacted ammonia. Low levels of nitrous oxide are produced an extended campaign lengths may be seen.

Abstract: The present invention provides methods and systems for providing printing services. In particular, the present invention enables a print job source, for example a facsimile machine, to print directly to a printer over a network, without an intervening personal computer. In an example embodiment of the invention, a telephone number is assigned to a printer. A print job is associated with the telephone number. The print job is then forwarded from a print job source to a spooling server over a network. The print job is associated with the printer at the spooling server based on the telephone number. The print job is then forwarded from the spooling server to the printer and printed.

Abstract: A turbocharger for an internal combustion engine comprises an air intake, a compressor, a compressor housing (2), a plurality of bypass channels (1) formed in the compressor housing (2) providing a short cut to air from the air intake into the turbine, and elements for controlling the extent to which the bypass channels are open, for example by a slidable or rotatable sleeve (5) having a pattern of slots (6) corresponding to the pattern of channels. This results in increased stability and overall efficiency.