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US 12,092,010 B2Granted
System for reducing voc and nitrogen oxide and method for reducing same
AssigneeKorea Research Institute of Chemical Technology
InventorsJin Hee Lee, Iljeong Heo, Tae Sun Chang, Ji Hoon Park, Sang Joon Kim, Young Jin Kim
Life of this patent
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Abstract
The present invention relates to a VOC reduction system and a VOC reduction method that applies pulse type thermal energy to a catalyst to activate the catalyst and oxidizes and removes the VOC.
Claims10
A pulse control system for reducing nitrogen oxides comprising:
- a housing having an inlet and an outlet formed such that exhaust gas is introduced and discharged therethrough;
- a composite catalyst carrier and heat supplier including a composite catalyst carrier and a heat supplier which are disposed between the inlet and the outlet and carry an occlusion material for occluding nitrogen oxides (NOx) inside the exhaust gas that has passed through the inlet and an oxidation/reduction catalyst;
- a reducing agent supply unit for storing a reducing agent for reducing the nitrogen oxides occluded by the occlusion material;
- and
- a pulse signal generator which is connected to each of the composite catalyst carrier and heat supplier, and the reducing agent supply unit to generate pulse signals so that the heat supplied into the composite catalyst carrier and the concentrations of reducing agent supplied into the housing maintain pulse types over time,
- wherein the composite catalyst carrier is directly heated by the heat supplier disposed on one side of the carrier.
3 more elements
A method for reducing nitrogen oxides using a pulse control system, the method comprising:
- (a) introducing exhaust gas through an inlet of a housing;
- (b) occluding nitrogen oxides in the exhaust gas by an occlusion material in a composite catalyst carrier and supplying heat to be supplied into the composite catalyst carrier by a signal of a pulse signal generator while maintaining a pulse type over time;
- (c) reducing and desorbing the nitrogen oxides by a reducing agent;
- and
- (d) discharging the reduced nitrogen (N2) generated in the step (c) through an outlet of the housing,
- wherein the composite catalyst carrier is directly heated by a heat supplier disposed on one side of the carrier,
- wherein the concentration of the reducing agent in step (c) maintains a pulse type over time by a signal of the pulse signal generator.
4 more elements
Dependencies are inferred from the claim text.