当前位置: X-MOL 学术Energy Convers. Manag. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Environment-friendly novel fuel additives: Investigation of the effects of graphite nanoparticles on performance and regulated gaseous emissions of CI engine
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2020-05-01 , DOI: 10.1016/j.enconman.2020.112748
Ammar Ahmed , Asad Naeem Shah , Ali Azam , Ghulam Moeen Uddin , Muhammad Sarfraz Ali , Sohaib Hassan , Haseeb Ahmed , Touqeer Aslam

Abstract Increased menacing engine emissions and threat to human health from metallic combustion catalysts demand a shift towards the application of non-metallic fuel additives. Therefore, the current study is an effort, conducted to introduce a new, less toxic and non-metallic graphite (G) nano diesel-fuel additive, by investigating its effects on the performance and regulated gaseous emissions of a four-cylinder, water-cooled, compression ignition (CI) engine. The experiments were also repeated with Iron oxide (Fe2O3) nanoparticles and statistical analyses were implemented to have a comparison with graphite nanoparticles. The G and Fe2O3 nanoparticles, in concentrations of 50, 100 and 150 mg per litre (mg/l), were mixed with neat diesel by magnetic stirring to prepare homogeneous fuel blends. The physicochemical properties of the fuel blends were determined. A maximum decrease of 4.9% in viscosity and an increase of 3.26% in Cetane index was observed for graphite blends. The investigated parameters include torque (T), brake power (BP), brake specific fuel consumption (bsfc), brake thermal efficiency (BTE), carbon monoxide (CO) and nitrogen oxides (NOx) emissions at engine speed varying from 1500 to 3000 rpm with an interval of 300 rpm at full load. The results revealed that at a confidence level of 95% (significance level α = 0.05), G-blends indicated a higher increase in torque, power, BTE and a greater decrease in bsfc than Fe2O3 blends. Graphite blends produced significantly lower NOx emissions than Fe2O3 treated blends. The increase in T, BP and BTE was 2.4%, 8.9% and 3.9% respectively, with 150 mg/l Fe2O3 blends and 2.9%, 9.6% and 4.1% respectively, with 150 mg/l G-blends. Graphite blends resulted in a 2.6% reduction in bsfc. The increase in NOx emissions was 34.7% with Fe2O3 and 29.2% with G at concentrations of 150 mg/l. The CO increased by 14.2% with G blends. A negative statistical correlation was observed for CO emissions between G and Fe2O3 blends. We conclude that G nanoparticles are more environmentally friendly fuel additives than Fe2O3; however, their application is more recommended for large turbocharged CI engines with improved oxygen density in inlet compressed air.

中文翻译:

环保新型燃料添加剂:石墨纳米颗粒对 CI 发动机性能和调节气体排放影响的研究

摘要 金属燃烧催化剂对发动机排放的威胁增加和对人类健康的威胁要求转向非金属燃料添加剂的应用。因此,目前的研究是一项努力,旨在通过研究其对四缸水-汽缸的性能和受调节的气体排放的影响,引入一种新的、毒性较小的非金属石墨 (G) 纳米柴油添加剂。冷却的压缩点火 (CI) 发动机。还使用氧化铁 (Fe2O3) 纳米粒子重复了实验,并进行了统计分析以与石墨纳米粒子进行比较。通过磁力搅拌将 G 和 Fe2O3 纳米粒子以 50、100 和 150 毫克/升 (mg/l) 的浓度与纯柴油混合,以制备均匀的燃料混合物。确定了燃料混合物的物理化学性质。观察到石墨混合物的粘度最大降低 4.9%,十六烷指数增加 3.26%。研究的参数包括扭矩 (T)、制动功率 (BP)、制动比燃料消耗 (bsfc)、制动热效率 (BTE)、发动机转速从 1500 到 3000 变化时的一氧化碳 (CO) 和氮氧化物 (NOx) 排放以 300 rpm 的间隔在满载时以 300 rpm 的速度旋转。结果表明,在 95% 的置信水平(显着性水平 α = 0.05)下,与 Fe2O3 混合物相比,G 混合物表明扭矩、功率、BTE 增加更多,而 bsfc 下降幅度更大。石墨混合物产生的 NOx 排放明显低于 Fe2O3 处理的混合物。T、BP 和 BTE 的增加分别为 2.4%、8.9% 和 3.9%,150 mg/l Fe2O3 混合物和 2.9%、9. 分别为 6% 和 4.1%,含 150 mg/l G 混合物。石墨混合物导致 bsfc 减少 2.6%。在浓度为 150 毫克/升时,使用 Fe2O3 时 NOx 排放量增加 34.7%,使用 G 时增加 29.2%。使用 G 混合物时,CO 增加了 14.2%。观察到 G 和 Fe2O3 混合物之间 CO 排放的负统计相关性。我们得出结论,G 纳米颗粒是比 Fe2O3 更环保的燃料添加剂;然而,它们更推荐用于大型涡轮增压 CI 发动机,以提高入口压缩空气中的氧气密度。观察到 G 和 Fe2O3 混合物之间 CO 排放的负统计相关性。我们得出结论,G 纳米颗粒是比 Fe2O3 更环保的燃料添加剂;然而,更推荐将其应用于进口压缩空气中氧气密度更高的大型涡轮增压 CI 发动机。观察到 G 和 Fe2O3 混合物之间 CO 排放的负统计相关性。我们得出结论,G 纳米颗粒是比 Fe2O3 更环保的燃料添加剂;然而,它们更推荐用于大型涡轮增压 CI 发动机,以提高入口压缩空气中的氧气密度。
更新日期:2020-05-01
down
wechat
bug