Wärtsilä NOx Reducer (NOR)

Reduce NOx emissions by 85-95% based on Selective Catalytic Reduction (SCR) technologies

The NOR units are able to reduce NOx emissions to a level of 1.5 g/kWh. IMO Tier III is expected to come into force in 2016.

The new SCR product range caters for the needs of all four-stroke engines in Wärtsilä’s portfolio and can be used for both newbuild and retrofits. The SCR control system is seamlessly integrated with the Wärtsilä engine control system and the units come with a completed prefabricated ancillary system.

Wärtsilä has built up a long field experience in running SCR on its own engines in both power plants and vessels since the early 1990s. Based of this experience Wärtsilä has developed a standard selection of modularized SCRs under the product name of Nitrogen Oxides Reducer (NOR) in close cooperation with a major catalyst manufacturer. The target was to combine efficiency, investment and operation cost.

Wärtsilä NOR reactor overall dimension table

**Wärtsilä NOR overall dimension table**
	A - Engine Power Output B - Reactor C - Reactor W D - Reactor H E - Reactor L F - Reactor Weight (including catalyst elements) G - Mixing duct straight length (bends are allowed after straight length)* H - Mixing duct total length (includes straight length)* * The length of the mixing duct is case dependant The figures are indicative.
A	B	C	D	E	F	G	H
kW	Size	mm	mm	mm	kg	m	m
400	1	840	840	3000	1100	2.3	3
401 - 550	2	840	1000	3000	1200	2.4	3.2
551 - 700	3	1000	1000	3116	1500	2.5	3.4
701 - 900	4	1000	1160	3116	1600	2.6	3.6
901 - 1100	5	1160	1160	3230	2000	2.7	3.8
1101 - 1350	6	1160	1320	3230	2100	2.7	3.9
1351 - 1600	7	1320	1320	3346	2500	2.5	3.9
1601 - 1850	8	1320	1480	3346	2600	2.8	4.2
1851 - 2150	9	1480	1480	3460	3000	2.6	4.1
2151 - 2450	10	1480	1640	3460	3100	2.9	4.5
2451 - 2800	11	1640	1640	3578	3500	2.7	4.3
2801 - 3150	12	1640	1800	3578	3600	2.6	4
3151 - 3600	13	1800	1800	3692	4100	2.9	4.4
3601 - 4000	14	1800	1960	3692	4200	2.7	4.2
4001 - 4400	15	1960	1960	3808	4700	2.6	4
4401 - 4800	16	1960	2120	3808	4800	2.8	4.3
4801 - 5300	17	2120	2120	3924	5300	2.7	4.1
5301 - 5850	18	2120	2280	3924	5400	2.9	4.4
5851 - 6300	19	2280	2280	4040	2900	2.8	4.3
6301 - 6800	20	2280	2440	4040	6000	3	4.6
6801 - 7400	21	2440	2440	4156	6600	2.9	4.4
7401 - 8000	22	2440	2600	4156	6800	3.1	4.7
8001 - 8600	23	2600	2600	4270	7300	3	4.5
8601 - 9200	24	2600	2760	4270	7500	3.2	4.8
9201 - 9900	25	2760	2760	4420	8300	3.1	4.6
9901 - 10600	26	2760	2920	4420	8500	3.3	4.9
10601 - 11200	27	2920	2920	4688	9400	3.2	4.7
11201 - 11900	28	2920	3080	4688	9600	3.1	4.6
11901 - 12700	29	3080	3080	4716	10500	3.3	4.8
12701 - 13400	30	3080	3240	4716	10700	3.4	5.1
13401 - 14200	31	3240	3240	4866	11700	3.4	4.9
14201 - 15000	32	3240	3400	4866	11900	3.5	5.1
15001 - 15800	33	3400	3400	5014	12800	3.6	5.4
15801 - 16600	34	3400	3560	5014	13000	3.4	4.9
16601 - 17500	35	3560	3560	5162	14000	3.5	5.1
17501 - 18400	36	3560	3720	5162	14300	3.6	5.3
18401 - 19300	37	3720	3720	5412	17300	3.7	5.5
19301 - 20200	38	3720	3880	5412	17500	3.9	5.7
20201 - 21200	39	3880	3880	5560	20600	4	5.9
21201 - 22200	40	3880	4040	5560	20900	4.1	6.2