Provided are a nitrous oxide decomposition method and a decomposition apparatus capable of efficiently decomposing nitrous oxide in a nitrous oxide-containing gas. Disclosed are: a method of decomposing nitrous oxide, which includes the step of bringing a catalyst including a titanium oxide-containing carrier carrying a component containing at least one kind selected from the group consisting of ruthenium and ruthenium compounds into contact with a nitrous oxide-containing gas containing nitrous oxide, water vapor and ammonia; and a nitrous oxide decomposition apparatus including a reactor filled with the above catalyst and a line that is connected to the reactor and supplies the nitrous oxide-containing gas to the reactor.

An emissions control system for an engine of a machine includes an exhaust conduit carrying a flow of exhaust gas from the engine, a de-NOx catalyst disposed along the exhaust conduit and configured to treat the flow of exhaust gas, a fuel reformer module configured to provide a gas stream containing hydrogen gas and carbon monoxide gas, and a junction disposed along the exhaust conduit between the engine and the de-NOx catalyst, the junction being arranged to mix at least a portion of the gas stream with the flow of exhaust gas such that the hydrogen gas and the carbon monoxide reach the de-NOx catalyst and act as reductants to regenerate the de-NOx trap.

A molecular sieve confined noble metal catalyst for CO-SCR denitrification, a preparation method and an application thereof are provided. The catalyst includes a molecular sieve carrier and Ir metal nanoclusters loaded in the molecular sieve carrier through confined encapsulation. The preparation method includes the following steps: mixing a first metal precursor solution with a first ligand to obtain a first mixed solution; mixing a second metal precursor solution with a second ligand to obtain a second mixed solution; mixing a silicon source, an aluminum source, an alkali and a solvent to obtain a molecular sieve precursor solution; mixing the molecular sieve precursor solution with the first mixed solution, then adding the second mixed solution for hydrothermal crystallization reaction, and then centrifugally washing, drying and calcining to obtain the catalyst.