Title:
METHOD FOR REMOVING NITROGEN OXIDE FROM DIESEL ENGINE
Document Type and Number:
Japanese Patent JPS63198711
Kind Code:
A
Abstract:
PURPOSE:To reduce the consumption and discharge quantity of NH3 by specifying the equivalent ratio of NH3 to NOx in the case of the reduction and removal of NOx via the addition of NH3 to an exhaust gas from a diesel engine and the contact of the exhaust gas with a catalyst of TiO2 system. CONSTITUTION:NOx is removed by reduction via the addition of NH3 to an exhaust gas from a diesel engine and the contact of a catalyst of TiO2 system therewith. In this case, the equivalent ratio of NH3 to NOx is decided in accordance with the formula: C>=2.967T-403-Co/(2.967T-403)(0.0026T-0.14), where 'T' shows temperature and 'Co' stands for a quantity of NOx discharged to the atmosphere. According to the aforesaid system, the quantity of NH3 added to the exhaust gas is precisely controlled and NOx is efficiently removed via reduction, while the consumption and quantity of NH3 discharged to the atmosphere are thereby being restrained.
Inventors:
SHIMODA MASATOSHI
Application Number:
JP3114887A
Publication Date:
August 17, 1988
Filing Date:
February 13, 1987
Export Citation:
Assignee:
HINO MOTORS LTD
International Classes:
F01N3/08; B01D53/94; F02B3/06; (IPC1-7): B01D53/36; F01N3/08
Domestic Patent References:
| JPS5593917A | 1980-07-16 |
Attorney, Agent or Firm:
Amamiya Masaki