Article
Energy & Fuels
Lijun Qian, Juye Wan, Yejian Qian, Yu Sun, Yuan Zhuang
Summary: This study aimed to investigate the effects of water injection and spark timing on the performance of a hybrid hydrogen-gasoline engine. Experimental results showed that the spark timing and maximum brake torque varied with the addition of water and/or hydrogen. The combustion deterioration caused by water injection can be improved by adding hydrogen and the stability of spark timing can be enhanced.
Article
Energy & Fuels
Selcuk Sarikoc
Summary: The study investigated the effects of hydrogen and methanol addition on a spark-ignition engine's performance, combustion, and emission characteristics. Results showed that adding methanol and hydrogen improved fuel efficiency and combustion characteristics compared to using pure gasoline, with the hydrogen-methanol-gasoline blend showing the most promising results.
Article
Thermodynamics
Yuqiang Li, Shoulong Lin, Long Huang, Jiangwei Liu
Summary: In this study, a skeletal chemical reaction mechanism of gasoline-ABE blends was constructed and validated using a CFD model. The results demonstrate that the combustion characteristics of gasoline-ABE blends in the engine can be accurately reproduced.
Article
Energy & Fuels
Xiaoyu Cong, Changwei Ji, Shuofeng Wang
Summary: The study found that blending DME can extend flame development and propagation periods, increase power output of the neat hydrogen engine, and reduce nitrogen oxides emissions. However, blending DME may increase cyclic variation due to weakened flame kernel and propagation process, but emissions can be controlled by adjusting the DME fraction.
Article
Green & Sustainable Science & Technology
Xiongbo Duan, Lubin Xu, Linxun Xu, Pengfei Jiang, Tian Gan, Haibo Liu, Shaobo Ye, Zhiqiang Sun
Summary: The global push for carbon neutrality has driven research into low-carbon or zero-carbon fuels for the transportation sector. This study investigates the use of industrial by-product hydrogen (IPH) in spark ignition (SI) engines and compares its performance with gasoline. The experimental results show that the SI engine fueled with IPH has improved fuel efficiency and lower emissions of CO and HC compared to the gasoline engine. However, it has higher NOx emissions. Overall, the SI engine fueled with IPH outperforms the gasoline engine in terms of fuel economy.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Computer Science, Information Systems
Md Nurun Nabi, Wisam K. Hussam, Mohammad Towhidul Islam, S. M. Muyeen
Summary: The study developed a one-dimensional model to investigate the effect of hydrogen share in gasoline fuel on the performance, combustion, and exhaust emissions of a gasoline direct-injection engine. The results showed that hydrogen-shared fuels have advantages over neat gasoline in terms of energy efficiency, emissions reduction, and economic sustainability.
Article
Energy & Fuels
Zhijie Zhu, Xingyu Liang, Lei Cui, Kun Wang, Xiaohui Wang, Shihao Zhu
Summary: Currently, most ships still rely on fossil fuels as the main source for marine engines. However, diesel as a fuel for marine engines is no longer sufficient to meet the economic requirements of shipping and emission restrictions imposed by regulations. This research examined the viability of employing hydrogen-carrying fuel ammonia (NH3) in marine engines to develop a low-carbon combustion technology, to address the carbon emission problem of marine diesel engines.
Article
Energy & Fuels
Hao Meng, Changwei Ji, Gu Xin, Jinxin Yang, Ke Chang, Shuofeng Wang
Summary: This study provides a comprehensive analysis of the hydrogen-fueled Wankel rotary engine (HWRE), comparing it with hydrogen-fueled reciprocating piston engines (HRPE) and gasoline conditions. The results show that HWRE has a higher power per displacement, but slightly lower brake thermal efficiency and higher NO emissions. Additionally, abnormal combustion characteristics and mechanisms differ between HWRE and HRPE.
Review
Green & Sustainable Science & Technology
Himanshu Sharma, Amit Dhir, Sunil Kumar Mahla
Summary: The study indicates that utilization of biogas decreases efficiency and exhaust temperature of compression ignition engines, but increases specific fuel consumption; hydrogen supplementation shows better performance at high and moderate loads with zero carbon emissions, though it leads to an increase in nitrogen oxide emissions as hydrogen proportion rises. Bottlenecks in hydrogen application for dual fuel mode are also discussed in detail.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Ahmad O. Hasan, Hani Al-Rawashdeh, Ahmad Abu-jrai, Mohamed R. Gomaa, Farrukh Jamil
Summary: Unburned hydrocarbon determination analysis of toxic unregulated HC chemical species from C5 to C11 was conducted using a one-cylinder gasoline research engine with different compression ratios. The study showed potential fuel economy and reduced exhaust emissions. The addition of hydrogen helped decrease harmful compounds and achieve acceptable levels. Aromatic species were found mainly in the engine exhaust at lower loads, while changing compression ratios had minimal influence on certain compound concentrations.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Environmental Sciences
Yonghyun Choi, Hoseung Yi, Youngkyu Oh, Sungwook Park
Summary: This study analyzed the effects of ER combustion strategy on the gaseous and particle emission characteristics of a GDI HEV through on-board PN measurement tests and chassis dynamometer tests. The results showed that adjusting parameters can significantly reduce particle emissions.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Energy & Fuels
Qing Liu, Tamilselvan Pachiannan, Wenjun Zhong, N. Nallusamy, Yanzhi Zhang, Zilong Li, Yong Qian, Qian Wang, Zhixia He, Xingcai Lu
Summary: The Gasoline Compression Ignition (GCI) engine is an advanced combustion mode engine that achieves high thermal efficiency while meeting upcoming emission regulations. However, it faces difficulties in igniting and maintaining stable combustion at low loads. To address these issues, a new high reactive fuel called hydrogenated catalytic biodiesel is mixed with gasoline in various ratios and its combustion and emission parameters are studied. The experimental results show that stable combustion can be achieved at low loads using this fuel blend. Delaying the injection timing in the single injection mode results in lower nitrogen oxide emissions and nucleation mode number concentration emissions under low load conditions. The double injection mode controls the maximum pressure rise rate and cyclic variations within a controlled range. From the different test conditions, it is recommended to use a lower pilot injection ratio (20%) during advanced start of injection (-60 deg. CA aTDC) as it yields better combustion and emission results. Overall, the gasoline-hydrogenated catalytic biodiesel blend shows promise for GCI engines in tackling low load difficulties.
Article
Chemistry, Multidisciplinary
Shiyi Pan, Jinhua Wang, Bin Liang, Hao Duan, Zuohua Huang
Summary: Hydrogen addition improves engine performance and extends the lean burn limit. Different hydrogen injection strategies result in different hydrogen mixture distributions, affecting engine performance and emissions. Hydrogen addition enhances ignition and combustion stability, reducing emissions.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Jonathan A. Martin, Matthew A. Ratcliff, Mohammad J. Rahimi, Jonathan L. Burton, Petr Sindler, Cameron K. Hays, Robert L. McCormick
Summary: This study identifies three potential low-carbon fuels, including methyl pentanoate, 1-pentanol, and 2-pentanol, that can be blended with gasoline for use in ACI engines. Testing showed that 1-pentanol and 2-pentanol significantly improve fuel sensitivity of ACI engines, while the effect of methyl pentanoate is not significant. Therefore, 1-pentanol and 2-pentanol are fuels of interest for further study as low-carbon blendstocks for ACI engines.
Article
Energy & Fuels
Mads Carsten Jespersen, Thomas Osterby Holst Rasmussen, Anders Ivarsson
Summary: This study investigates the lean-burn characteristics of ammonia in a pre-mixed SI engine and the influence of spark energy and discharge characteristics on engine performance and emissions. The results show that by optimizing the spark ignition system, the need for an ignition improver can be mitigated. The emissions of unburned ammonia and NOx are kept at low levels, and the balance between NH3 and NOx emissions is achieved by advancing the ignition timing.