METHOD FOR THE CONVERSION OF DINITROGEN OXIDE

    公开(公告)号:BG104805A

    公开(公告)日:2001-08-31

    申请号:BG10480500

    申请日:2000-09-27

    Abstract: The invention relates to a method for the catalytic reduction of dinitrogen oxide (N2O) in the presence of zeolite with the addition of a reducing agent, characterized in that the reducing agent used is a saturated hydrocarbon such as methane (CH4), propane (C3H8), LPG (C3H8/C4H10) or a combination of these reducing agents, It has been found that temperatures of 400 degrees C or lower can be achieved for complete N2O conversion even with very low concentrations of the reducing agent and in the presence of water vapour. 11 claims

    145.
    发明专利
    未知

    公开(公告)号:AT202432T

    公开(公告)日:2001-07-15

    申请号:AT97912573

    申请日:1997-11-13

    Abstract: An arrangement is proposed for a system with at least two molten carbonate or solid oxide fuel cell stacks (1, 2, 3). The cathode flows (14) of these stacks are connected in series while the anode flows (25) are in parallel. All stacks have an internal reforming device for a hydrocarbon fuel. Anode gas is recycled (24) from the stack outlets to the inlets. The invention allows the stacks to be of the same design and this reduces manufacturing costs. The cathode streams between the stacks are cooled by, for example, adding streams of cool air (15) to them. The cathode inlet temperatures can, therefore, be controlled by relatively inexpensive low temperature air valves. The invention allows the system to be designed with few heat exchangers, if any. The per pass utilization of all the oxidant streams and fuel streams are low. The efficiency of the system is typically 4-5 percentage points higher than that of equivalent conventional systems.

    Reduction of n<sub>2</sub>o emissions
    147.
    发明专利

    公开(公告)号:AU7458500A

    公开(公告)日:2001-04-24

    申请号:AU7458500

    申请日:2000-09-06

    Abstract: A method for the selective catalyst reduction of nitrous oxide (N2O) in the presence of a solid catalyst, with the addition of a saturated hydrocarbon as reducing agent. The catalyst used is a promoted, iron-containing zeolite. As a result, it is possible to increase the conversion of (N2O) compared to unpromoted iron-containing zeolite catalysts. The promoted catalyst is active at temperatures below 350° C. Furthermore, it has been found that the iron-containing zeolite catalysts which are promoted with precious metal also give low emissions of CO and residual hydrocarbons. The catalyst is also very active under high process pressures and in the presence of sulphur.

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