Numerical study of inhibition mechanism of high-pressure hydrogen leakage self-ignition with the addition of ammonia  

作　　者：Lin Teng Xi-Gui Li Zhi-Wei Shan Wei-Dong Li Xin Huang Peng-Bo Yin Yong-Zhen Liu Jiang Bian Yu Luo Li-Long Jiang 

机构地区：[1]National Engineering Research Center of Chemical Fertilizer Catalyst(NERC-CFC),College of Chemical Engineering,Fuzhou University,Fuzhou,350000,Fujian,China [2]Qingyuan Innovation Laboratory(QYIL,Fujian Innovation Laboratory of Chemical Engineering),Quanzhou,362000,Fujian,China [3]cEngineering,China University of Petroleum(East China),Qingdao,266580,Shandong,China [4]State Key Laboratory of Automobile Safety and Energy,School of Vehicle and Mobility,Tsinghua University,Beijing,100084,China

出　　处：《Petroleum Science》2023年第5期3184-3193,共10页石油科学（英文版）

基　　金：supported by the National Key R&D Program of China for Renewable Energy and Hydrogen Technology(Grant No.2021YFB4000403);the National Natural Science Foundation of China(Grant No.52204072);the National Natural Science Foundation of China(Grant No.22038002);the Science Fund for Creative Research Groups of the National Natural Science Foundation of China(Grant No.22221005);the Fujian Science and Technology Major Project(Grant No.2020HZ07009);the Natural Science Foundation of Fujian Province(Grant No.2020J05098).

摘　　要：Hydrogen and ammonia have attracted increasing attention as carbon-free fuels.Ammonia is considered to be an effective energy storage and hydrogen storage medium.However,a small amount of unremoved NH3 is still present in the product during the decomposition of ammonia to produce hydrogen.Therefore,it is very essential to investigate the self-ignition of hydrogen-ammonia mixtures in order to accommodate the various scenarios of hydrogen energy applications.In this paper,the effect of NH3 addition on the self-ignition of high-pressure hydrogen release is numerically investigated.The RNG k-εturbulence model,EDC combustion model,and 213-step detailed NH_(3)/H_(2) combustion mechanism are used.CHEMKIN-Pro programs for zero-dimensional homogeneous and constant volume adiabatic reactor models are used for sensitivity analysis and ignition delay time of the chemical reaction mechanism.The results showed that the minimum burst pressure required for self-ignition increased significantly after the addition of ammonia.The maximum temperature and shock wave intensity inside the tube decreases with increasing ammonia concentration.The ignition delay time and H,HO2,and OH radicals reduce with increasing ammonia concentration.H and HO2 radicals are suggested as indicators for tracking the second and third flame branches,respectively.

关 键 词：Ammonia-hydrogen energy SELF-IGNITION Shock waves Diffusion ignition Computational fluid dynamics 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]