University of Birmingham Improving Gasoline Direct Injection (GDI) Engine Efficiency and Emissions with Hydrogen from Exhaust Gas Fuel Reforming
University of Birmingham Improving Gasoline Direct Injection (GDI) Engine Efficiency and Emissions with Hydrogen from Exhaust Gas Fuel Reforming
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发表时间：
2015
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通讯作者：
D. Fennell;J. Herreros;A. Tsolakis
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作者：
D. Fennell;J. Herreros;A. Tsolakis
废气燃料重整被认为是一种热化学能量回收技术，有可能提高汽油机的效率，从而减少二氧化碳以及其他气体和颗粒物(PM)的排放。该原理依赖于通过吸热催化重整汽油和发动机尾气的一部分来实现从热尾气中回收能量。富氢的重整油比提供给重整装置的汽油具有更高的焓，并再循环到进气歧管，即重整废气再循环(REGR)。通过向传统的EGR系统中加入氢气和一氧化碳(CO)，对REGR系统进行了模拟。在典型的汽油排气温度下，REGR气流中的氢和CO浓度被选择为可在实际中获得的。重点是将REGR与基准汽油发动机进行比较，并与传统的EGR进行比较。结果表明，REGR具有同时提高热效率、减少气体排放和减少PM生成的潜力。
Graphical Abstract Abstract Exhaust gas fuel reforming has been identified as a thermochemical energy recovery technology with potential to improve gasoline engine efficiency, and thereby reduce CO 2 in addition to other gaseous and particulate matter (PM) emissions. The principle relies on achieving energy recovery from the hot exhaust stream by endothermic catalytic reforming of gasoline and a fraction of the engine exhaust gas. The hydrogen-rich reformate has higher enthalpy than the gasoline fed to the reformer and is recirculated to the intake manifold, i.e. reformed exhaust gas recirculation (REGR). The REGR system was simulated by supplying hydrogen and carbon monoxide (CO) into a conventional EGR system. The hydrogen and CO concentrations in the REGR stream were selected to be achievable in practice at typical gasoline exhaust temperatures. Emphasis was placed on comparing REGR to the baseline gasoline engine, and also to conventional EGR. The results demonstrate the potential of REGR to simultaneously increase thermal efficiency, reduce gaseous emissions and decrease PM formation.