1. Process for removing nitric oxides (NOx) and nitrous oxide (N2O) from a gas comprising:
adding an amount of ammonia to said gas, said gas comprising NOx, N2O, oxygen and water, such that the amount of ammonia is at a value 0.7<X<1.4, wherein X is the voluminal ratio of ammonianitrogen oxides;
causing said gas to circulate at temperatures ranging between 200 and 600\xb0 C., on a catalyst comprising a iron beta-zeolite.
2. Process according to claim 1, wherein said gas comprises between 100 and 7000 ppmv of NOx and N2O.
3. Process according to claim 1, wherein said iron beta-zeolite comprises an iron beta-zeolite granule and an agglomeration binder.
4. Process according to claim 1 in which the iron beta-zeolite is a beta zeolite of SiAl molar ratio ranging between 8 and 100, charged with iron by impregnation or exchange, in which the content by weight of iron ranges between 0.02 and 8%.
5. Process according to claim 4, wherein the SiAl molar ratio ranges between 8 and 20.
6. Process according to claim 4, wherein the content by weight of iron ranges between 0.5-3%.
7. Process according to claim 1, in which said gas circulates over the iron beta catalyst at voluminal velocities per hour (VVH) from 1000 to 50000 h\u22121.
8. Process according to claim 1, wherein the volume content of oxygen ranges between 1.5 and 5% and the volume content of water between 0.5 and 5%.
9. Process according to claim 1, in which the gas is a tail gas from a nitric acid production factory.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An apparatus for reconfiguring a received command in a memory device, the apparatus comprising:
a register for storing a reconfigured command;
indication logic, coupled to the register, for generating an indication signal when the register has been altered;
transfer gate logic for either outputting or blocking, in response to the indication signal, the received command; and
a comparator, coupled to the register and the received command, for comparing the received command to the reconfigured command and outputting the received command when the received and the reconfigured commands are equal.
2. The apparatus of claim 1 and further including a reset signal coupled to the register that puts the register into a predetermined default state.
3. The apparatus of claim 2 wherein the indication logic is a logical NOR gate having inputs coupled to the contents of the register.
4. The apparatus of claim 3 wherein the NOR gate outputs a logical 1 when all of the inputs have the same logical state.
5. The apparatus of claim 2 wherein the predetermined default state is all logical zeros.
6. The apparatus of claim 1 wherein the transfer gate logic is a logical AND gate.
7. An apparatus for reconfiguring a received command in a flash memory device comprising a plurality of memory dies, each die having a die address, the apparatus comprising:
a register for storing a reconfigured command comprising the die address, the register comprising a reset input for setting the register contents to a predetermined state;
indication logic, coupled to the register, for generating an indication signal when the register has stored the reconfigured command;
transfer gate logic for either outputting or blocking, in response to the indication signal, a received command; and
a comparator coupled to the register and the received command for comparing the received command to the reconfigured command and outputting the reconfigured command when the received and the reconfigured commands are equal.
8. The apparatus of claim 7 wherein the flash memory device is a NAND architecture flash memory device.
9. The apparatus of claim 7 wherein the flash memory device is a NOR architecture flash memory device.