Article
Thermodynamics
Yuanyou Tang, Yang Wang, Wuqiang Long, Ge Xiao, Yongjian Wang, Weixing Li
Summary: This paper proposes a method for online methanol steam reforming and hydrogen production using waste heat recovery from an engine, and investigates the influence of key operational parameters on reforming performance through simulation and sensitivity analysis. The findings provide a valuable reference for designing and enhancing the performance of methanol reformer.
Article
Thermodynamics
Kazuteru Toshinaga, Naoto Izumi, Toshio Shudo
Summary: This study investigates the potential for improving the thermal efficiency of a waste heat recovery engine system through fuel reforming, focusing on steam methane reforming due to its endothermic reactions. The effects of engine operating conditions on exhaust gas temperature and heat were experimentally examined, while equilibrium calculations were used to investigate the effects of steam methane reforming conditions on methane conversion and the heating value of the reformed gas. The heat balance of the system was analyzed and parameters for optimizing thermal efficiency and maximizing waste heat recovery were identified. The influence of temperature-efficiency ratios of heat exchangers on the system's thermal efficiency for practical applications was also evaluated.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Physical
Jinwon Yun, Ngoc Van Trinh, Sangseok Yu
Summary: Three different system configurations of methanol steam reforming systems were compared in this study, and it was found that the internally evaporated methanol steam reformer efficiently converts methanol into a hydrogen-rich mixture.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Konstantinos Kappis, Joan Papavasiliou, Marcin Kusmierz, Grzegorz Slowikc, Yifan Li, Haibin Li, Wojciech Gac, George Avgouropoulos
Summary: Steam reforming of methanol using CuZnOx catalysts was investigated, and the incorporation of Ga was found to improve catalyst performance by altering the environment and promoting the formation of ZnGa2O4 spinels and oxygen vacancies. The presence of Ga2O3 (15 wt%) was beneficial for activity and selectivity, and the formation of a CuZnGaAlOx system further enhanced the performance. The most active material showed promising results in an integrated internal reforming methanol fuel cell operating at 220 degrees C.
CHEMICAL ENGINEERING JOURNAL
(2023)
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
Thermodynamics
Yazhou Shen, Kai Zhang, Yan Zhang, Christophe Duwig
Summary: This paper presents a numerical study on the efficient use of green methanol in a wet Brayton cycle with chemical recuperation. The results show that steam addition affects the oxidation pathway and leads to distributed flames, where autoignition mechanism dominates the ignition process.
Article
Chemistry, Physical
Iliana D. Dimitrova, Thanos Megaritis, Lionel Christopher Ganippa, Efstathios Al-Tingas
Summary: This study investigates the feasibility of using hydrogen peroxide as an ignition promoter in a dual fuel concept using Chemkin Pro's HCCI numerical model. The results show that under lean fuel conditions, the use of hydrogen peroxide significantly improves engine performance and reduces NOx emissions. Further research is needed to demonstrate the practicality of this proposed technology.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Caroline Teixeira Rodrigues, Gabriela de Franca Lopes, Christian Goncalves Alonso, Luiz Mario de Matos Jorge, Paulo Roberto Paraiso
Summary: Studies on the integration of reforming systems with Fuel Cells are intriguing for energy production in remote areas. The development of multi-fuel processors that can utilize various fuels without modifying the unit is particularly interesting. This study modeled and simulated an Autonomous Fuel Cell (AFC) system with methanol and/or Dimethyl Ether Steam Reforming (SR) using Aspen Plus. The evaluation focused on process variables, operational conditions, and the need for additional processes.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Alankrit Srivastava, Parmod Kumar, Atul Dhar
Summary: Research on internal combustion engines focuses on improving efficiency, reducing emissions, and using alternative fuels. Hydrogen-enhanced combustion is an efficient method, but hydrogen storage remains a challenge. On-board fuel reforming is a promising solution to the storage issue.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Konstantinos Kappis, Joan Papavasiliou, George Avgouropoulos
Summary: The production of hydrogen through methanol reforming processes, especially steam reforming, has attracted significant interest due to its ability to produce high concentrations of hydrogen with minimal carbon monoxide. Different catalytic systems, preparation methods, and integration with high temperature-polymer electrolyte membrane fuel cells are being actively studied in this field.
Article
Thermodynamics
Hongsheng Wang, Rufan Yang, Bingzheng Wang, Zenghao Wei, Hui Kong, Xiaofei Lu, Jian Jin
Summary: In this study, a thermodynamic analysis of solar-driven methanol steam reforming reaction in a Pd-Ag membrane reactor was conducted. The results showed that, under optimized reaction conditions, the conversion rate of methanol reached high levels and purified hydrogen and carbon dioxide could be collected separately. Due to the use of solar energy and the membrane reactor, it is predicted that significant coal and carbon dioxide savings can be achieved.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Oliver Fernie, Thanos Megaritis, Lionel Christopher Ganippa, Efstathios-Al. Tingas
Summary: The addition of hydrogen peroxide and steam as ignition promoters in a hydrogen-fuelled HCCI engine improves engine performance and reduces NOx emissions. The optimal balance between performance and emissions is achieved with 5%-10% hydrogen peroxide and 10%-15% steam addition. Additionally, it was found that high efficiency can be achieved with a small amount of hydrogen peroxide at higher compression ratios.
Article
Chemistry, Physical
Abdulrahman Almithn, Zaid Alhulaybi
Summary: This study presents a mechanistic investigation of methanol decomposition and MSR pathways on Ni2P catalyst using density functional theory calculations. The results suggest that MSR can compete with methanol decomposition on Ni2P, unlike other transition metals which primarily generate CO rather than CO2.
Article
Energy & Fuels
Narankhuu Jamsran, Hyunwook Park, Junsun Lee, Seungmook Oh, Changup Kim, Yonggyu Lee, Kernyong Kang
Summary: HCCI combustion with different syngas compositions was studied, showing that higher H2 content in the fuel can facilitate fast burning and good combustion stability. The NOx emissions were very low due to the ultra-lean, diluted charge used for HCCI combustion.
Article
Chemistry, Physical
Alankrit Srivastava, Parmod Kumar, Atul Dhar
Summary: Hydrogen-rich combustion in engines helps reduce pollutants, but the poor energy storage density of hydrogen limits its usage on moving vehicles. This study focuses on using methanol as a fuel to produce hydrogen through steam reforming reaction, utilizing exhaust engine waste energy for thermochemical recuperation. By improving the design of the reactor with a finned surface and diffusing inlet section, the conversion of methanol is significantly increased.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2015)
Article
Thermodynamics
T. Shudo, T. Nakajima, K. Hiraga
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2009)
Article
Thermodynamics
T. Shudo, K. Toshinaga
INTERNATIONAL JOURNAL OF ENGINE RESEARCH
(2010)
Article
Chemistry, Physical
Toshio Shudo, Kento Omori, Osamu Hiyama
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2008)
Article
Chemistry, Physical
Toshio Shudo, Kensuke Suzuki
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2008)
Article
Chemistry, Physical
Toshio Shudo, Shuji Oba
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2009)
Article
Chemistry, Physical
Toshio Shudo, Yosuke Shima, Tatsuya Fujii
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2009)
Article
Chemistry, Physical
Anh Tuan Pham, Tomohiro Baba, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Chemistry, Physical
Anh Tuan Pham, Tomohiro Baba, Tatsuki Sugiyama, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2013)
Article
Chemistry, Physical
Tetsuro Kariya, Tomoki Hirono, Hiroshi Funakubo, Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2014)
Article
Chemistry, Physical
Shiro Tanaka, Toshio Shudo
JOURNAL OF POWER SOURCES
(2014)
Article
Chemistry, Physical
Toshio Shudo
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2007)
Article
Transportation Science & Technology
Tie Li, Hiroyuki Izumi, Toshio Shudo, Hideyuki Ogawa
SAE INTERNATIONAL JOURNAL OF FUELS AND LUBRICANTS
(2009)