【Ten Years of Rapid Development in Chemical Engineering Equipment】The 2659-2025 project on \"Research and Development of Key Technologies for Hydrogen-Blended Natural Gas (HCNG) Internal Combustion Engines and Their Demonstration Applications\" has completed its evaluation

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Let’s give praise and encouragement to the achievements made in China’s chemical engineering technology and equipment; your participation in discussions is the greatest encouragement. **********************【Ten Years of Progress in Chemical Engineering Equipment】A continuously updated summary post is available – feel free to join the discussions: https://bbs.hcbbs.com/thread-3576046-1-1.html ***************** Recently, reporters learned from Inner Mongolia Dongyuan Technology Group Co., Ltd. that the major scientific and technological project in Inner Mongolia Autonomous Region, titled “Research and Development of Key Technologies for Hydrogen-Blended Natural Gas (HCNG) Internal Combustion Engines and Their Demonstration Applications,” has completed its evaluation and approval process. 　　It is reported that this project is led by Inner Mongolia Dongyuan Technology Group Co., Ltd., with Tsinghua University, Xi’an Jiaotong University, Guangxi Yuchai Machinery Co., Ltd., Henan Diesel Engine Heavy Industry Co., Ltd., Jiangsu Yihetjie Auto Technology Co., Ltd., Beijing HJ Clean Energy Technology Co., Ltd., Beijing Qidi Clean Energy Technology Co., Ltd., and Beijing Huaye Sunshine New Energy Co., Ltd. serving as the research partners for the project. 　　The project team carried out measurements and data analysis on the flammability limits, laminar/turbulent combustion rates, and ignition delay times of natural gas fuels with hydrogen addition at high pressures (5%–100%), established a database of the properties of such hydrogen-enhanced natural gas fuels, and developed a chemical reaction kinetics model for HCNG. The chemical reaction kinetics model predicted values for the flammability limit, ignition delay time, and laminar flame speed, with errors compared to experimental values being no more than 5%. A chemical reaction kinetics mechanism for HCNG fuel suitable for the development of combustion systems in HCNG engines was developed. By combining this mechanism with a combustion model for HCNG engines, a numerical simulation model that can accurately predict NOx emissions was created. The pressure diagrams obtained from numerical simulations of the operation of HCNG engines showed peak value errors of less than 2% when compared to experimental measurements. Predictive models for ignition within the engine cylinder and for the accelerated propagation of turbulent flames that lead to detonation were also developed, enabling accurate simulation of turbulent combustion within the engine cylinder as well as prediction of detonation events. 　　The project team was the first to develop a fully functional and high-performance HCNG internal combustion engine testing platform, whose hydrogen blending ratio for HCNG fuel ranges from 0% to 100%, thus filling a gap in China. The project team also completed the development of key systems and components such as the combustion system, intake and exhaust systems, turbocharging system, and electronic control system for hydrogen-blended natural gas internal combustion engines. 　　The project team developed two hydrogen-enhanced natural gas internal combustion engines for power generation, with effective powers of 500 kilowatts and 1,500 kilowatts respectively, and a maximum effective thermal efficiency of over 42%, meeting the emission limit requirements of Phase 2 specified in NB/T 42112-2017 \"Emission Limits for Reciprocating Internal Combustion Gas Generator Sets\"; these hydrogen-enhanced natural gas internal combustion engine generator sets have been successfully put into demonstration use. 　　The project team has completed the development of a prototype HCNG internal combustion engine for commercial vehicles. This HCNG internal combustion engine has a maximum net power of 284 kilowatts, a highest effective thermal efficiency of 40.6%, and its emissions meet the requirements set by National Standard VI. 　　The project team has applied for over 50 invention patents, published more than 100 high-quality academic papers, and contributed to the formulation of 5 national and industry standards. The key technology for hydrogen-blended natural gas internal combustion engines developed by the project team was evaluated by academicians such as Huang Zhen, Guo Konghui, Huang Weihe, and Ma Yushan as being at an internationally advanced level overall; in particular, the research on the combustion theory and related technologies for hydrogen-blended gas internal combustion engines are at the international leading level. This achievement earned the team the first prize in the Beijing Science and Technology Award. 　　It is understood that in June 2024, the **National Development and Reform Commission listed the “Terminal HCNG Demonstration Project” as a project eligible for priority support under the \"Natural Gas Utilization Management Measures,\" providing important policy support for the technological innovation of HCNG engines and the development of new products in China. The relevant official stated that this major scientific and technological project was successfully completed and passed the evaluation, laying a solid foundation for independent innovation and commercial application of key technologies related to hydrogen-blended natural gas internal combustion engines in China.