Low-Load Dual-Fuel Compression Ignition (CI) Engine Operation with an On-Board Reformer and a Diesel Oxidation Catalyst: Effects on Engine Performance and Emissions
Low-Load Dual-Fuel Compression Ignition (CI) Engine Operation with an On-Board Reformer and a Diesel Oxidation Catalyst: Effects on Engine Performance and Emissions
复制标题
使用车载重整器和柴油氧化催化剂的低负载双燃料压燃 (CI) 发动机运行：对发动机性能和排放的影响
DOI：
10.1021/ef900796p
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发表时间：
2010
期刊：
影响因子：
5.3
通讯作者：
Tsolakis A
中科院分区：
文献类型：
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作者：
Tsolakis A
在废气燃料重整方法中，部分发动机废气与少量发动机燃料在装配在废气再循环（EGR）回路中的微型反应器中反应以产生称为重整EGR（REGR）的气态燃料。在这项研究中，热REGR（气体含有H2，CO，CH 4，和CO2）被反馈到发动机进气道，使柴油机的双燃料与进气加热和EGR（CO2的存在）的效果运行。研究了柴油机燃用不同REGR比例的双燃料对柴油机性能和排放的影响。该研究集中在低负荷发动机运行，其中条件不利于有效的气体燃料氧化和发动机燃烧稳定性。预混气体燃料的添加导致NOx和烟度的发动机排放显着减少。一氧化碳和氢气氧化效率可以通过仔细选择REGR添加（例如，预混合空气/燃料比、入口温度和降低的缸内O2浓度）和缸内柴油喷射正时。在发动机排气中使用负载在Al 2 O3上的Pt作为氧化催化剂可以在低于部分负荷下发动机排气温度的温度下消除CO和H2。优选地，在实际的发动机重整器系统中，未燃烧的CO和H2将用于增强后处理系统（即，柴油机微粒过滤器、NOx捕集器和NOx的烃选择性催化还原）性能。
In the exhaust gas fuel-reforming method, part of the engine exhaust gas reacts with small amounts of engine fuel in a mini-reactor fitted in the exhaust gas recirculation (EGR) loop to produce gaseous fuel named reformed EGR (REGR). In this study, hot REGR (gas containing H2, CO, CH4, and CO2) was fed back to the engine inlet, so that the diesel engine in effect operated in dual fuel with inlet heating and EGR (CO2existence). The effects of the diesel engine dual fueling with different REGR percentages on the engine performance and emissions have been examined. The study focused at low-load engine operation, where the conditions are not favorable for efficient gaseous fuel oxidation and engine combustion stability. The addition of the premixed gaseous fuel resulted in a remarkable reduction of both NOxand smoke engine emissions. Carbon monoxide and hydrogen oxidation efficiency can be improved by careful selection of REGR addition (e.g., premixed air/fuel ratio, inlet temperature, and reduced in-cylinder O2concentration) and in-cylinder diesel injection timing. The use of Pt supported on Al2O3as an oxidation catalyst at the engine exhaust can eliminate both CO and H2at temperatures lower than the engine exhaust gas temperature at part loads. Preferably, in an actual engine reformer system, the uncombusted CO and H2will be used to enhance the aftertreatment system (i.e., diesel particulate filter, NOxtraps, and hydrocarbon-selective catalytic reduction of NOx) performance.