Full Text:   <2267>

Summary:  <1821>

CLC number: TQ534

On-line Access: 2015-10-01

Received: 2013-07-04

Revision Accepted: 2015-07-27

Crosschecked: 2015-09-15

Cited: 0

Clicked: 3993

Citations:  Bibtex RefMan EndNote GB/T7714


Kun-zan Qiu


Zhi-hua Wang


-   Go to

Article info.
Open peer comments

Journal of Zhejiang University SCIENCE A 2015 Vol.16 No.10 P.820-829


Effect of dilution of fuel in CO2 on the conversion of NH3 to NOx during oxy-fuel combustion

Author(s):  Kun-zan Qiu, Ye Yang, Zhuo You, Zhi-hua Wang, Zhi-jun Zhou, Jun-hu Zhou, Ke-fa Cen

Affiliation(s):  1State Key Lab of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   wangzh@zju.edu.cn

Key Words:  CO2, Oxy-fuel combustion, NO, Fuel dilution

Kun-zan Qiu, Ye Yang, Zhuo You, Zhi-hua Wang, Zhi-jun Zhou, Jun-hu Zhou, Ke-fa Cen. Effect of dilution of fuel in CO2 on the conversion of NH3 to NOx during oxy-fuel combustion[J]. Journal of Zhejiang University Science A, 2015, 16(10): 820-829.

@article{title="Effect of dilution of fuel in CO2 on the conversion of NH3 to NOx during oxy-fuel combustion",
author="Kun-zan Qiu, Ye Yang, Zhuo You, Zhi-hua Wang, Zhi-jun Zhou, Jun-hu Zhou, Ke-fa Cen",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Effect of dilution of fuel in CO2 on the conversion of NH3 to NOx during oxy-fuel combustion
%A Kun-zan Qiu
%A Ye Yang
%A Zhuo You
%A Zhi-hua Wang
%A Zhi-jun Zhou
%A Jun-hu Zhou
%A Ke-fa Cen
%J Journal of Zhejiang University SCIENCE A
%V 16
%N 10
%P 820-829
%@ 1673-565X
%D 2015
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1300231

T1 - Effect of dilution of fuel in CO2 on the conversion of NH3 to NOx during oxy-fuel combustion
A1 - Kun-zan Qiu
A1 - Ye Yang
A1 - Zhuo You
A1 - Zhi-hua Wang
A1 - Zhi-jun Zhou
A1 - Jun-hu Zhou
A1 - Ke-fa Cen
J0 - Journal of Zhejiang University Science A
VL - 16
IS - 10
SP - 820
EP - 829
%@ 1673-565X
Y1 - 2015
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1300231

The indirect chemical effects of fuel dilution by CO2 on NO formation were investigated numerically in this paper. CH4 doped with NH3 was used as fuel, while CO2 and O2 were mixed as oxidant. The dilution effect of CO2 was then investigated through adding extra CO2 to the reaction system. An isothermal plug flow reactor was used. An unbranched chain reaction mechanism is proposed to illustrate the chemical effects of CO2 on the H/O/OH radical pool and NOx. Due to the reaction between CO2 and H, extra NO will be formed in fuel-rich conditions, while NO will be inhibited in fuel-lean conditions and high CO2 dilution conditions. The reaction affected the radical pools of OH, H, and O of the branched chain reaction, and then the formation and reduction of NO. The pool of H had the greatest effect on NO reduction. The results suggest that the indirect chemical effects on NO formation differ between diluted fuel oxy-fuel combustion conditions and NOrmal oxy-fuel conditions.

This paper reports on a computational study of the influence of CO2 dilution and reaction on the formation and reduction of NO generated from CH4 doped with NH3 (to simulate fuel-bound N).The area of study is of great importance to the combustion and energy community.


方法:通过Chemkin Pro中塞流式反应器模块对混入NH3的CH4燃料在O2/CO2气氛中反应进行数值模拟,同时改变CO2的稀释程度来探索CO2浓度对NOx生成的影响,并比较不同反应机理下的模拟结果,探索此环境中NOx的生成机理(表1)。
结论:1. 无支链反应机理可用于解释CO2在还原性粒子环境中对NOx生成与还原的影响;2. 随着CO2浓度的升高,无支链反应和支链反应相互竞争H,进而抑制NO的生成;3. 在对NH3转化效率的影响方面,CO2浓度增加引发的无支链反应和支链反应对H的竞争,在富燃料条件下从促进转化变为抑制转化,在化学当量和贫燃料条件下从无影响变为抑制转化。


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


[1]Ahn, J., Kim, H.J., Choi, K.S., 2009. Combustion characteristics of oxy-fuel burners for CO2 capturing boilers. Journal of Thermal Science and Technology, 4(3):408-413.

[2]Bhuiyan, A.A., Naser, J., 2015a. Numerical modelling of oxy fuel combustion, the effect of radiative and convective heat transfer and burnout. Fuel, 139:268-284.

[3]Bhuiyan, A.A., Naser, J., 2015b. Computational modelling of co-firing of biomass with coal under oxy-fuel condition in a small scale furnace. Fuel, 143:455-466.

[4]Boushaki, T., Mergheni, M.A., Sautet, J.C., et al., 2008. Effects of inclined jets on turbulent oxy-flame characteristics in a triple jet burner. Experimental Thermal and Fluid Science, 32(7):1363-1370.

[5]Boushaki, T., Sautet, J.C., Labegorre, B., 2009. Control of flames by tangential jet actuators in oxy-fuel burners. Combustion and Flame, 156(11):2043-2055.

[6]Buhre, B.J.P., Elliott, L.K., Sheng, C.D., et al., 2005. Oxy-fuel combustion technology for coal-fired power generation. Progress in Energy and Combustion Science, 31(4):283-307.

[7]Cao, H., Sun, S., Liu, Y., et al., 2010. Computational fluid dynamics modeling of NOx reduction mechanism in oxy-fuel combustion. Energy & Fuels, 24(1):131-135.

[8]Chui, E.H., Douglas, M.A., Tan, Y.W., 2003. Modeling of oxy-fuel combustion for a western Canadian sub-bituminous coal. Fuel, 82(10):1201-1210.

[9]Chui, E.H., Majeski, A.J., Douglas, M.A., et al., 2004. Numerical investigation of oxy-coal combustion to evaluate burner and combustor design concepts. Energy, 29(9-10):1285-1296.

[10]Feng, B., Ando, T., Okazaki, K., 1998. NO destruction and regeneration in CO2 enriched CH4 flame. JSME International Journal Series B-Fluids and Thermal Engineering, 41(4):959-965.

[11]Glarborg, P., Bentzen, L.L.B., 2008. Chemical effects of a high CO2 concentration in oxy-fuel combustion of methane. Energy & Fuels, 22(1):291-296.

[12]Habib, M.A., Badr, H.M., Ahmed, S.F., et al., 2011. A review of recent developments in carbon capture utilizing oxy-fuel combustion in conventional and ion transport membrane systems. International Journal of Energy Research, 35(9):741-764.

[13]Hecht, E.S., Shaddix, C.R., Molina, A., et al., 2011. Effect of CO2 gasification reaction on oxy-combustion of pulverized coal char. Proceedings of the Combustion Institute, 33(2):1699-1706.

[14]Kiga, T., Takano, S., Kimura, N., et al., 1997. Characteristics of pulverized-coal combustion in the system of oxygen recycled flue gas combustion. Energy Conversion and Management, 38:S129-S134.

[15]Mendiara, T., Glarborg, P., 2009. Ammonia chemistry in oxy-fuel combustion of methane. Combustion and Flame, 156(10):1937-1949.

[16]Normann, F., Andersson, K., Leckner, B., et al., 2008. High-temperature reduction of nitrogen oxides in oxy-fuel combustion. Fuel, 87(17-18):3579-3585.

[17]Normann, F., Andersson, K., Leckner, B., et al., 2009. Utilization of reburn reactions for NOx control in oxy-fuel combustion. AIChE Annual Meeting, Nashville, USA.

[18]Wang, C., Jia, L., Tan, Y., et al., 2008. Carbonation of fly ash in oxy-fuel CFB combustion. Fuel, 87(7):1108-1114.

[19]Watanabe, H., Yamamoto, J.I., Okazaki, K., 2011. NOx formation and reduction mechanisms in staged O2/CO2 combustion. Combustion and Flame, 158(7):1255-1263.

Open peer comments: Debate/Discuss/Question/Opinion


Please provide your name, email address and a comment

Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou 310027, China
Tel: +86-571-87952783; E-mail: cjzhang@zju.edu.cn
Copyright © 2000 - 2024 Journal of Zhejiang University-SCIENCE