System for processing combustion exhaust gas containing soot particles and NOx

A system for processing a combustion exhaust composition, the system comprising:

• an inlet configured to receive an exhaust composition comprising soot particles and gaseous components, the gaseous components comprising NOx compounds;
• an outlet configured to discharge a processed composition;
• a soot remover located between the inlet and outlet, the soot remover comprising a filter configured to filter soot particles while passing most of the gaseous components, the soot remover being configured to provide an oxidizing agent to the filtered soot particles such that at least part of the filtered soot particles is oxidized and broken into smaller molecules that can pass through the filter;
• and
• a NOx converter located between the soot converter and outlet, the NOx converter comprising an adsorber configured to adsorb at least part of the NOx, the NOx converter being configured to provide a reducing agent to the adsorbed NOx such that at least part of the adsorbed NOx is reduced and converted to N2.

A system for processing exhaust gas of an engine, comprising:

• a first reactor configured to oxidize at least part of hydrocarbons, CO, NO and particulate matters contained in an exhaust gas;
• a second reactor configured to collect the particulate matters with a filter and oxidizing the collected particulate matters;
• a third reactor comprising a light source, a light-activated redox catalyst and an adsorber configured to adsorb NOx contained in the exhaust gas, the third reactor being configured to remove at least part of the adsorbed NOx by a reduction reaction thereof;
• a controller for controlling intensity of light from the light source;
• and
• wherein the first, second and third reactors are located in a conduit for flowing exhaust gas of an engine.