Article
Chemistry, Physical
B. S. Nuthan Prasad, Jayashish Kumar Pandey, G. N. Kumar
Summary: The study of combining methanol and hydrogen has shown significant improvements in performance and combustion efficiency, while drastically reducing overall emissions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Kyoung Hyun Kwak, Dewey Jung, Hyunil Park, Jeonghwan Paeng, Kyumin Hwang
Summary: This study developed a novel knock model for SI engine simulations, which accurately simulates knock combustion and provides knock detection and knock-limited spark timing estimation under various conditions, serving as an effective tool to reduce experimental efforts during engine development.
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
Energy & Fuels
Zengqiang Zhu, Zhiqiang Mu, Yanju Wei, Ruiheng Du, Shenghua Liu
Summary: The performance of a heavy-duty pure methanol engine was evaluated and compared to the original natural gas engine through experiments. The results showed that the pure methanol engine had higher brake thermal efficiency and better tolerance to exhaust gas recirculation. Lower NOx and CO emissions were observed in the pure methanol engine, but higher HC emissions were recorded.
Article
Thermodynamics
M. H. Dinesh, Jayashish Kumar Pandey, G. N. Kumar
Summary: The experimental study showed that using methanol/LPG dual fuel can significantly improve the performance of an SI engine, with increased brake power, brake thermal efficiency, and volumetric efficiency. The flame development period decreases, while the flame propagation period and total combustion duration depend on the compression ratio and LPG fraction.
Article
Chemistry, Physical
Paolo Sementa, Jacson Beltrao de Vargas Antolini, Cinzia Tornatore, Francesco Catapano, Bianca Maria Vaglieco, Jose Javier Lopez Sanchez
Summary: This study investigates the performance and emissions of a single-cylinder SI engine operating under lean-burn hydrogen combustion and compares it to methane under similar conditions. The results show that hydrogen combustion achieves stable combustion with lower pollutant emissions and higher efficiency, making it a promising clean fuel to replace conventional fuels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Yizi Zhu, Zhixia He, Yanzhi Zhang, Tiemin Xuan, Qian Wang, Zhuang Shao, Weimin Li
Summary: The study investigates the potential of using a tri-fuel combustion mode, combining hydrogen, methanol, and diesel, to improve performance and reduce emissions in compression ignition engines. Through the integration of low-temperature combustion technology and online hydrogen production through methanol steam reforming, efficient and clean combustion is achieved. The optimization results demonstrate that the tri-fuel combustion mode surpasses the methanol/diesel and reformed gas/diesel dual-fuel modes in terms of thermal efficiency and emissions reduction, while also increasing methanol energy substitution rate.
Article
Energy & Fuels
Beiping Jiang, Wei Hong, Fangxi Xie, Yan Su, Yu Liu, Shuang Feng
Summary: SICI combined combustion mode can solve the problems in HCCI combustion and achieve stable combustion under appropriate conditions. With the changes in wall temperature and ignition timing, the characteristics and emissions of SICI combustion also vary accordingly.
Article
Thermodynamics
Zengqiang Zhu, Haoming Gu, Zan Zhu, Yanju Wei, Ke Zeng, Shenghua Liu
Summary: This paper discusses the importance of heavy-duty natural gas spark ignition engines and the impact of methanol mixture preparation and flow. The study found that an optimized injection strategy can promote mixture homogeneity and improve engine braking thermal efficiency.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Selcuk Sarikoc
Summary: This paper presents a novel approach to assess the environmental and enviro-economic impact of an SI engine under different loads and fuel blends. The results show that adding methanol to gasoline increases the fuel consumption rate while adding hydrogen reduces it. Methanol slightly increases the CO2 environmental impact, whereas hydrogen significantly reduces it. Methanol decreases NO emissions, while hydrogen increases it. The study also calculates the enviro-economic effect of the different fuel blends. The findings provide new insights into the use of alternative fuels in internal combustion engines.
Article
Energy & Fuels
Victor M. Dominguez, Juan J. Hernandez, Angel Ramos, Miriam Reyes, Jose Rodriguez-Fernandez
Summary: This study investigates the performance and environmental impact of using hydrogen and methanol as fuels in a heavy-duty compression-ignition engine under dual-fuel combustion. The results show that methanol outperforms hydrogen in various conditions, but hydrogen can substitute a higher percentage of diesel fuel at low loads.
Article
Energy & Fuels
J. Benajes, R. Novella, J. Gomez-Soriano, I. Barbery, C. Libert
Summary: Hydrogen is a promising alternative fuel for the transportation industry, particularly for lean burn in internal combustion engines. Combining hydrogen with the passive pre-chamber ignition system can enhance combustion efficiency. The use of hydrogen improves thermo-chemical properties, flame speed, and flame structure, leading to increased thermal efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Jeroen Dierickx, Luc Mattheeuws, Koen Christianen, Karsten Stenzel, Sebastian Verhelst
Summary: Hydrogen and methanol are promising fuels for sustainable transport due to their CO2 neutral, ultralow emissions, and high efficiency properties. The dual-fuel technology, where diesel is used as a pilot to ignite injected hydrogen or methanol, is of interest for retrofitting existing diesel engines. This study focuses on medium speed large bore engines and investigates the ignition delay timing of the diesel pilot, which is crucial for accurate numerical prediction of heat release.
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.
Article
Chemistry, Physical
Jayashish Kumar Pandey, G. N. Kumar
Summary: The global requirement is shifting towards territorial independence of energy sources. Ethanol and biofuels are the primary sectors in this transition. Ethanol has replaced a significant portion of gasoline, and butanol is a more efficient fuel compared to ethanol. This study experimentally tested biobutanol/hydrogen at different compression ratios (CR) and found that increasing hydrogen has a more impressive effect on the combustion process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
