Experimental study of volatile-N conversion at O2/CO2 atmosphere in a drop tube furnace

Huali Cao; Shaozeng Sun; Hao Chen; Xianyu Meng; Dong Wang; Terry F. Wall

Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace

Huali Cao
, Shaozeng Sun^*
, Hao Chen
, Xianyu Meng
, Dong Wang
, Terry F. Wall

^*Corresponding author for this work

School of Energy Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

In coal combustion, NOx is largely formed from the oxidation of volatile nitrogen compounds such as HCN and NH₃. The experiments on the volatile-N conversion to NO at O₂/CO₂ atmosphere were carried out in a drop tube furnace. The effects of the excess oxygen ratio λ (0.6-1.4), temperature (1000-1300 °C), O₂/CO₂ ratio, and as well as CH₄/NH₃mole ratio were investigated. To further understand the importance of NO reburn during volatile combustion, experiments were also performed with different concentrations of background NO (0-950 ppm). The results show that volatile-N conversion to NO is sensitive to excess oxygen ratio λ at strongly oxidizing atmosphere. For volatile combustion, there is an optimal temperature and inlet O₂ concentration to minimize the volatile-N conversion to NO. The CH ₄/NH₃ mole ratio plays an important role on the NO formation under oxidizing atmosphere. High levels of background NO prohibit the volatile-N conversion to NO significantly as the volatile-N conversion ratio decreases by 19-36%. The reburn fractions of recycle NO in fuel-rich and fuel-lean condition are 14.8% and 9.8% at 1200 °C, respectively.

Original language	English
Title of host publication	Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion
Publisher	Springer-Verlag Berlin Heidelberg
Pages	257-260
Number of pages	4
ISBN (Print)	3540356061, 9783642304446
State	Published - 2012
Event	7th International Symposium on Coal Combustion: Cleaner Combustion and Sustainable World, ISCC - Harbin, China Duration: 17 Jul 2011 → 20 Jul 2011

Publication series

Name	Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion

Conference

Conference	7th International Symposium on Coal Combustion: Cleaner Combustion and Sustainable World, ISCC
Country/Territory	China
City	Harbin
Period	17/07/11 → 20/07/11

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

NO release
Volatile-n

Cite this

Cao, H., Sun, S., Chen, H., Meng, X., Wang, D., & Wall, T. F. (2012). Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace. In Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion (pp. 257-260). (Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion). Springer-Verlag Berlin Heidelberg.

Cao, Huali ; Sun, Shaozeng ; Chen, Hao et al. / Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace. Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion. Springer-Verlag Berlin Heidelberg, 2012. pp. 257-260 (Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion).

@inproceedings{d4824b00760640ba9a50a96ba96c28a5,

title = "Experimental study of volatile-N conversion at O2/CO2 atmosphere in a drop tube furnace",

abstract = "In coal combustion, NOx is largely formed from the oxidation of volatile nitrogen compounds such as HCN and NH3. The experiments on the volatile-N conversion to NO at O2/CO2 atmosphere were carried out in a drop tube furnace. The effects of the excess oxygen ratio λ (0.6-1.4), temperature (1000-1300 °C), O2/CO2 ratio, and as well as CH4/NH3mole ratio were investigated. To further understand the importance of NO reburn during volatile combustion, experiments were also performed with different concentrations of background NO (0-950 ppm). The results show that volatile-N conversion to NO is sensitive to excess oxygen ratio λ at strongly oxidizing atmosphere. For volatile combustion, there is an optimal temperature and inlet O2 concentration to minimize the volatile-N conversion to NO. The CH 4/NH3 mole ratio plays an important role on the NO formation under oxidizing atmosphere. High levels of background NO prohibit the volatile-N conversion to NO significantly as the volatile-N conversion ratio decreases by 19-36\%. The reburn fractions of recycle NO in fuel-rich and fuel-lean condition are 14.8\% and 9.8\% at 1200 °C, respectively.",

keywords = "NO release, Volatile-n",

author = "Huali Cao and Shaozeng Sun and Hao Chen and Xianyu Meng and Dong Wang and Wall, \{Terry F.\}",

year = "2012",

language = "英语",

isbn = "3540356061",

series = "Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion",

publisher = "Springer-Verlag Berlin Heidelberg",

pages = "257--260",

booktitle = "Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion",

note = "7th International Symposium on Coal Combustion: Cleaner Combustion and Sustainable World, ISCC ; Conference date: 17-07-2011 Through 20-07-2011",

}

Cao, H, Sun, S, Chen, H, Meng, X, Wang, D & Wall, TF 2012, Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace. in Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion. Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion, Springer-Verlag Berlin Heidelberg, pp. 257-260, 7th International Symposium on Coal Combustion: Cleaner Combustion and Sustainable World, ISCC, Harbin, China, 17/07/11.

Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace. / Cao, Huali; Sun, Shaozeng; Chen, Hao et al.
Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion. Springer-Verlag Berlin Heidelberg, 2012. p. 257-260 (Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Experimental study of volatile-N conversion at O2/CO2 atmosphere in a drop tube furnace

AU - Cao, Huali

AU - Sun, Shaozeng

AU - Chen, Hao

AU - Meng, Xianyu

AU - Wang, Dong

AU - Wall, Terry F.

PY - 2012

Y1 - 2012

N2 - In coal combustion, NOx is largely formed from the oxidation of volatile nitrogen compounds such as HCN and NH3. The experiments on the volatile-N conversion to NO at O2/CO2 atmosphere were carried out in a drop tube furnace. The effects of the excess oxygen ratio λ (0.6-1.4), temperature (1000-1300 °C), O2/CO2 ratio, and as well as CH4/NH3mole ratio were investigated. To further understand the importance of NO reburn during volatile combustion, experiments were also performed with different concentrations of background NO (0-950 ppm). The results show that volatile-N conversion to NO is sensitive to excess oxygen ratio λ at strongly oxidizing atmosphere. For volatile combustion, there is an optimal temperature and inlet O2 concentration to minimize the volatile-N conversion to NO. The CH 4/NH3 mole ratio plays an important role on the NO formation under oxidizing atmosphere. High levels of background NO prohibit the volatile-N conversion to NO significantly as the volatile-N conversion ratio decreases by 19-36%. The reburn fractions of recycle NO in fuel-rich and fuel-lean condition are 14.8% and 9.8% at 1200 °C, respectively.

AB - In coal combustion, NOx is largely formed from the oxidation of volatile nitrogen compounds such as HCN and NH3. The experiments on the volatile-N conversion to NO at O2/CO2 atmosphere were carried out in a drop tube furnace. The effects of the excess oxygen ratio λ (0.6-1.4), temperature (1000-1300 °C), O2/CO2 ratio, and as well as CH4/NH3mole ratio were investigated. To further understand the importance of NO reburn during volatile combustion, experiments were also performed with different concentrations of background NO (0-950 ppm). The results show that volatile-N conversion to NO is sensitive to excess oxygen ratio λ at strongly oxidizing atmosphere. For volatile combustion, there is an optimal temperature and inlet O2 concentration to minimize the volatile-N conversion to NO. The CH 4/NH3 mole ratio plays an important role on the NO formation under oxidizing atmosphere. High levels of background NO prohibit the volatile-N conversion to NO significantly as the volatile-N conversion ratio decreases by 19-36%. The reburn fractions of recycle NO in fuel-rich and fuel-lean condition are 14.8% and 9.8% at 1200 °C, respectively.

KW - NO release

KW - Volatile-n

UR - https://www.scopus.com/pages/publications/84866102128

M3 - 会议稿件

AN - SCOPUS:84866102128

SN - 3540356061

SN - 9783642304446

T3 - Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion

SP - 257

EP - 260

BT - Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion

PB - Springer-Verlag Berlin Heidelberg

T2 - 7th International Symposium on Coal Combustion: Cleaner Combustion and Sustainable World, ISCC

Y2 - 17 July 2011 through 20 July 2011

ER -

Cao H, Sun S, Chen H, Meng X, Wang D, Wall TF. Experimental study of volatile-N conversion at O₂/CO₂ atmosphere in a drop tube furnace. In Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion. Springer-Verlag Berlin Heidelberg. 2012. p. 257-260. (Cleaner Combustion and Sustainable World - Proceedings of the 7th International Symposium on Coal Combustion).