1）Niu Yanqing*, Tan Houzhang, Hui Shi’en, Ash-related issues during biomass combustion: alkali-induced slagging, silicate melt-induced slagging (ash fusion), agglomeration, corrosion, ash utilization, and related countermeasures, Progress in Energy and Combustion Science, 2016, 52: 1-61. DOI:10.1016/j.pecs.2015.09.003

2）Niu Yanqing*, Lv Yuan, Lei Yu, Liu Siqi, Liang Yang, Wang Denghui, Hui Shi’en, Biomass torrefaction: properties, applications, challenges, and economy. Renewable and Sustainable Energy Reviews 2019, 115: 109395. DOI:10.1016/j.rser.2019.109395

3）Liu Siqi, Niu Yanqing*, Shang Yimin, Zhu Guangqing, Hui Shi’en. A percolation model of fly ash formation during the combustion of non-uniform porous char. Combustion and Flame 2023, 251: 112720. DOI:10.1016/j.combustflame.2023.112720

4）Liu Siqi, Wen Liping, Niu Yanqing*, Yan Bokang, Lei Yu, Wang Denghui, Hui Shi’en. Separate physicochemical effects of CO₂ on the coal char combustion: An experimental and kinetic study. Combustion and Flame 2022, 235:111717. DOI:10.1016/j.combustflame.2021.111717

5）Liu Siqi, Niu Yanqing*, Wen Liping, Kang Yaqian, Wang Yufeng, Wang Denghui, Hui Shi’en. Experimental and kinetics studies on the evolution and effects of ash film during pulverized coal char combustion, Combustion and Flame 2021, 233:111623. DOI:10.1016/j.combustflame.2021.111623  

6）Niu Yanqing*, Liu Siqi, Yan Bokang, Lv Yuan, Lei Yu, Wang Denghui, Hui Shi’en. Experimental and kinetics studies on separate physicochemical effects of steam on coal char combustion, Combustion and Flame 2020, 220: 168-177. DOI:10.1016/j.combustflame.2020.06.035

7）Niu Yanqing*, Liu Siqi, Shaddix Christopher R, Hui Shi’en. An intrinsic kinetics model to predict complex ash effects (ash film, dilution, and vaporization) on pulverized coal char burnout in air (O₂/N₂) and oxy-fuel (O₂/CO₂) atmospheres, Proceedings of the Combustion Institute 2019, 37(3): 2781-2790. DOI:10.1016/j.proci.2018.06.010

8）Niu Yanqing, Liu Xing, Wang Shuai, Hui Shi’en*, Shaddix Christopher R *, A numerical investigation of the effect of flue gas recirculation on the evolution of ultra-fine ash particles during pulverized coal char combustion, Combustion and Flame 2017, 184, 1-10 DOI:10.1016/j.combustflame.2017.05.029

9）Niu Yanqing*, Wang Shuai, Shaddix Christopher R, Hui Shi’en, Kinetic modeling of the formation and growth of inorganic nano-particles during pulverized coal char combustion in O₂/N₂ and O₂/CO₂ atmospheres, Combustion and Flame, 2016, 173: 195-207. DOI:10.1016/j.combustflame.2016.08.021

10）Niu Yanqing*, Shaddix Christopher R. A Sophisticated Model to Predict Ash Inhibition during Combustion of Pulverized Char Particles, Proceedings of the Combustion Institute, 2015, 35: 561-569. DOI:10.1016/j.proci.2014.05.077

11）Niu Yanqing, Zhu Yiming, Tan Houzhang*, Wang Xuebin, Hui Shi’en, Du Wenzhi. Experimental Study on The Coexistent Dual Slagging in Biomass-fired Furnaces: Alkali-induced Slagging and Silicate Melt-induced Slagging, Proceedings of the Combustion Institute 2015, 35, 2405-2413. DOI:10.1016/j.proci.2014.06.120

12）Wang Xuebin, Tan Houzhang*, Niu Yanqing, Pourkashanian Mohamed, Ma Lin, Chen Erqiang, Liu Yang, Liu Zhengning, Xu Tongmo. Experimental Investigation on Biomass Co-firing in a 300 MW Pulverized Coal-fired Utility Furnace in China, Proceedings of the Combustion Institute, 2011, 33: 2725-2733. DOI:10.1016/j.proci.2010.06.055

13）Niu Yanqing*, Wen Liping, Guo Xin, Hui Shi’en, Co-disposal and reutilization of municipal solid waste and its hazardous incineration fly ash. Environment International, 2022, 166：107346

14）Zhu Guangqing, Gong Yanhao, Niu Yanqing*, Wang Shuai, Lei Yu, Hui Shi’en, Study on NOx emissions during the coupling process of preheating-combustion of pulverized coal with multi-air staging, Journal of Cleaner Production, 2021, 292:126012. DOI:10.1016/j.jclepro.2021.126012

15）Wang Denghui*, Li Hui, Yao Qi, Hui Shi’en, Niu Yanqing, Assisting effect of Al₂O₃ on MnOx for NO catalytic oxidation, Green Energy & Environment, 2021, 6(6): 903-909. DOI:10.1016/j.gee.2020.07.005

16）Li Tian*, Niu Yanqing, Wang Liang, Shaddix Christopher, Løvås Terese, High temperature gasification of high heating-rate chars using a flat-flame reactor, Applied Energy 2018, 227, 100-107. DOI: 10.1016/j.apenergy.2017.08.075

17）Niu Yanqing, Yan Bokang, Liu Siqi, Liang Yang, Dong Ning, Hui Shi’en*, Ultra-fine particulate matters (PMs) formation during air and oxy-coal combustion: Kinetics study, Applied Energy 2018, 218: 46–53. DOI:10.1016/j.apenergy.2018.02.164

18）Niu Yanqing, Du Wenzhi, Tan Houzhang*, Xu Weigang, Liu Yuanyi, Xiong Yingying, Hui Shi’en. Further Study on Biomass Ash Characteristics at Elevated Ashing Temperatures: the Evolution of K, Cl, S and the Ash Fusion Characteristics, Bioresource Technology 2013, 129: 642–645 DOI:10.1016/j.biortech.2012.12.065

19）Tan Houzhang*, Niu Yanqing, Wang Xuebin, Xu Tongmo, Hui Shi’en. Study of Optimal Pulverized Coal Concentration in a Four-wall Tangentially Fired Furnace, Applied Energy 2011, 88(4): 1164-1168. DOI:10.1016/j.apenergy.2010.09.026、

20）Niu Yanqing, Tan Houzhang*, Wang Xuebin, Liu Zhengning, LiuYang, Xu Tongmo. Study on Fusion Characteristics of Biomass Ash, Bioresource Technology 2010, 101(23): 9373–9381. DOI:10.1016/j.biortech.2010.06.144