Experimental and numerical analyses of nitrogen oxides formation in a high ammonia‑low hydrogen blend using a tangential swirl burner

作     者：A.Alnasif S.Mashruk M.Kovaleva P.Wang A.Valera-Medina 

作者机构：College of Physical Sciences and EngineeringQueen’s BuildingCardiff UniversityCardiffWales CF243AAUK Engineering Technical College of Al-NajafAl-Furat Al-Awsat Technical UniversityNajaf 31001Iraq Institute for Energy ResearchJiangsu UniversityJiangsu 212013China 

出 版 物：《碳中和(英文)》 (Carbon Neutrality)

年 卷 期：2022年第1卷第1期

页      面：291-310页

学科分类：0820[工学-石油与天然气工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the SAFE-AGT pilot(no.EP/T009314/1)with funding from the Engineering and Physical Sciences Research Council(EPSRC) 

主　　题：Ammonia N_(2)O NO Chemiluminescence Kinetic modeling 

摘      要：Ammonia has been considered as a novel fuel for decarbonization ***,emissions from combustion systems are still posing a ***,experimental and numerical simulations have been conducted to study the concentration of exhaust emissions(Nitric oxide“NO,Nitrous oxide“N_(2)O)from burning the ammonia/hydrogen(NH_(3)/H_(2))blend 85/15(vol%).The effects were measured at various thermal powers ranging 10 to 20 kW and with different Reynolds numbers from 20,000—40,*** experimental points were numerically investigated in the Ansys CHEMKIN-Pro environment employing seven chemical kinetic mechanisms taken from the *** experiments have been undertaken at standard atmospheric *** experimental results showed that both NO and N_(2)O gradually increased when the Reynolds number increased from 20,000 to 40,*** with that,the concentration of NO emissions at the exhaust reported minimum level when the Re=20,000 due to lower reactivity radical formation,all that led to a deterioration of the flame ***,the integrated radical intensities of NO*,OH*,NH*,and NH_(2)*demonstrate an increasing trend as Re increased from 20,000 to 40,*** terms of thermal power,N_(2)O suffered an abrupt decrease when the thermal power increased up to 15 kW,while the opposite occurs for *** addition,the radicals intensity of OH*,NH*and NH_(2)*figures show an increase in their concentration when the thermal power increased up to 15 kW then decreased with increasing thermal intensity to reach 20 kW,reflecting into increased NO productions and decreased N_(2)O *** numerical analysis showed that Stagni,Bertolino,and Bowen Mei were the most accurate mechanisms as these give a good prediction for NO and N_(2)*** study also showed that the chemical reaction(HNO+O_(2)←→NO+HO_(2))is the main source of NO *** the chemical reaction(NH+NO←→N_(2)O+H)is responsible for the formation of N_(2)O by consuming NO and when there will