@inproceedings{614d491e77ea417eb513fe999e63e785,
title = "Controlling emissions of natural gas engines",
abstract = "Different selective catalytic reduction (SCR) and oxidation catalyst systems were assessed to study the effects of these catalysts on the NO x, the hydrocarbon and the particle emissions from natural gas engines. High NO x reductions were observed at low ammonia slips. A separate oxidation catalyst was used downstream of the SCR. The NO x reduction efficiency was found to depend on the exhaust gas temperature. The efficiency of a catalyst reactor to remove hydrocarbons was found to depend on the hydrocarbon species, the exhaust temperature as well as the exhaust flow. The total measured PM mass was lower downstream of the catalyst than in the engine exhaust at all temperatures studied. Catalyst systems were found to have significant effects on particulate emissions. ",
author = "Kati Lehtoranta and Timo Murtonen and Hannu Vesala and P{\"a}ivi Koponen and Jenni Alanen and Niina Kuittinen and Pauli Simonen and Topi R{\"o}nkk{\"o} and Sanna Saarikoski and Hilkka Timonen and Teuvo Maunula and Kauko Kallinen and Satu Korhonen",
year = "2017",
month = jan,
day = "1",
language = "English",
series = "Proceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA",
publisher = "Air and Waste Management Association",
booktitle = "Air and Waste Management Association's Annual Conference and Exhibition 2017",
address = "United States",
note = "110th Annual Conference and Exhibition of the Air and Waste Management Association,AWMA ACE 2017 : Bridging Environment, Energy and Health, AWMA ACE 2017 ; Conference date: 05-06-2017 Through 08-06-2017",
}