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1. (WO2018100187) PRODUCING AMMONIUM CARBAMATE AND REDUCING NITROGEN OXIDES

Pub. No.:    WO/2018/100187    International Application No.:    PCT/EP2017/081246
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Sat Dec 02 00:59:59 CET 2017
IPC: C01B 21/12
B01D 53/90
B01D 53/94
F01N 3/20
C01C 1/26
Applicants: LOUGHBOROUGH UNIVERSITY
Inventors: WILSON, Jonathan
HARGRAVE, Graham
Title: PRODUCING AMMONIUM CARBAMATE AND REDUCING NITROGEN OXIDES
Abstract:
A process for reducing nitrogen oxides in an exhaust stream, such as a vehicle exhaust stream, and apparatus for carrying out the process. The process comprises providing a first composition comprising aqueous urea, a second composition comprising ammonium carbamate and an exhaust stream comprising nitrogen oxides.A process for producing the ammonium carbamate is also provided. The second composition may be introduced into the exhaust stream (10) when the exhaust stream has a temperature below a threshold temperature and the first composition may be introduced into the exhaust stream when the exhaust stream has a temperature at or above the threshold temperature.