ABSTRACT

The transportation sector is a major emitter of carbon dioxide emissions. It is a known fact that carbon dioxide is the cause of global warming which has resulted in extreme weather conditions as well as climate change. In this study a combination of different methods of expediting the CO₂ emission from a single cylinder common rail direct injection (CRDI) engine has been explored. The methods include use of low carbon content biofuels (lemon peel oil (LPO) and camphor oil (CMO), inducing hydrogen in the intake manifold and zeolite based after-treatment system. Initial engine operation with the low carbon content biofuel blends resulted in reduced smoke and CO₂ emissions. Substitution of the blends with hydrogen further assisted in decrease in emission and improvement in engine efficiency. Later on in the exhaust pipe an after-treatment system containing zeolite was placed. The emissions were found to reduce even further and at full load condition the lowest CO₂ (39.7% reduction) and smoke (49% reduction) emissions were observed with LPO blend and hydrogen induction. The NO emission with hydrogen induction increases for both the blends, however, it was seen that the zeolite based treatment system was effective in reducing the emission as well. As compared to baseline diesel, the maximum reduction in NO emission was 23% at full load with LPO blend, hydrogen induction and after-treatment system.

摘要

交通运输部门是二氧化碳排放的主要排放者。众所周知，二氧化碳是导致极端天气条件和气候变化的全球变暖的原因。在这项研究中，探索了加速单缸共轨直喷 (CRDI) 发动机CO ₂排放的不同方法的组合。这些方法包括使用低碳含量的生物燃料（柠檬皮油 (LPO) 和樟脑油 (CMO)），在进气歧管和基于沸石的后处理系统中产生氢气。使用低碳含量生物燃料混合物的初始发动机运行导致减少烟雾和 CO ₂排放。用氢替代混合物进一步有助于减少排放和提高发动机效率。后来在排气管中放置了一个含有沸石的后处理系统。发现排放量进一步减少，在满负荷条件下，使用 LPO 混合和氢气诱导观察到最低的 CO ₂（减少 39.7%）和烟雾（减少 49%）排放。两种共混物的 NO 排放随着氢诱导增加，然而，可以看出基于沸石的处理系统在减少排放方面也是有效的。与基准柴油相比，在使用 LPO 混合、氢气诱导和后处理系统的情况下，满负荷时 NO 排放的最大减少为 23%。