Composition capable of reducing CO and NOx emissions, preparation method therefor and use thereof, and fluid catalytic cracking method

A composition capable of reducing CO and NOx emissions, comprising:

• an inorganic oxide carrier;
• a first metal element supported on the inorganic oxide carrier;
• and
• a second metal element supported on the inorganic oxide carrier,
• wherein the first metal element is a mixture of metals selected from the group consisting of non-noble metal elements in Group VIII, wherein the first metal element includes Fe and Co at a weight ratio of Fe to Co of 1:
• (0.1-10) on an oxide basis,
• wherein the second metal element is at least one selected from the group consisting of metals of Group IA and/or Group IIA, and
• wherein, based on a total weight of the composition, the inorganic oxide carrier is in an amount of 10-90% by weight, and on an oxide basis, the first metal element is in an amount of 0.5-50% by weight and the second metal element is in an amount of 0.5-20% by weight,
• wherein at least part of Fe in the composition is in a form of iron carbide and elemental iron, and
• wherein at least part of Co in the composition is in a form of cobalt mono-oxide and elemental cobalt.