abstract |
ABSTRACT Catalytic cracking or selective contact reduction of NOx in exhaust gases is improved in these known processes by use of a Chevrel phase compound as the catalyst. The catalytic compounds have the formula Mx Mo6 S8-y and/or Mx Mo6 S8-y Oz, where M is metal, S is chalcogen, O is oxygen, x is 1-5, 8-y is 7.4-8.5 and z is from 2 to 8. |