INFLUENCE OF O2 AND NO2 ON ADSORPTION PRODUCTS OF SO2 BY Ca(OH)2 AT LOW TEMPERATURE

XU Ya-wei; WANG Zhi-peng; LI Peng-fei; HAN Yong-qiang; LI Qing-hai; TONG Hui-ling

doi:10.13205/j.hjgc.202011019

Volume 38 Issue 11

Apr. 2021

Turn off MathJax

Article Contents

Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(11): 117-122,129

XU Ya-wei, WANG Zhi-peng, LI Peng-fei, HAN Yong-qiang, LI Qing-hai, TONG Hui-ling. INFLUENCE OF O2 AND NO2 ON ADSORPTION PRODUCTS OF SO2 BY Ca(OH)2 AT LOW TEMPERATURE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 117-122,129. doi: 10.13205/j.hjgc.202011019

Citation:

XU Ya-wei, WANG Zhi-peng, LI Peng-fei, HAN Yong-qiang, LI Qing-hai, TONG Hui-ling. INFLUENCE OF O₂ AND NO₂ ON ADSORPTION PRODUCTS OF SO₂ BY Ca(OH)₂ AT LOW TEMPERATURE[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(11): 117-122,129. doi: 10.13205/j.hjgc.202011019

Citation:

PDF( 5217 KB)

INFLUENCE OF O₂ AND NO₂ ON ADSORPTION PRODUCTS OF SO₂ BY Ca(OH)₂ AT LOW TEMPERATURE

doi: 10.13205/j.hjgc.202011019

1. Energy and Power Engineering, Tsinghua University, Beijing 100084, China;
2. Energy-Saving&Environmental Protection Co., Ltd, MCC Group, Beijing 100088, China

Received Date: 2020-02-17
Available Online: 2021-04-23
Publish Date: 2021-04-23

Abstract

Abstract

In order to analyze the fixation and oxidation reaction of SO₂ in simultaneous removal of SO₂ and NO_x by Ca(OH)₂, and the influence of O₂ and NO₂ on this progress, DRIFTS(diffuse reflectance infrared Fourier transform spectrometry) and fixed bed reactor were used respectively for composition changes of solid and gas phase at 100 ℃ and 0% RH. The results showed that firstly SO₂ was rapidly adsorbed on Ca(OH)₂ to form CaSO₃, which could hardly be oxidized by O₂, but could be oxidized to CaSO₄ by NO₂. CaSO₃ showed selectivity during simultaneous removal process, of which the infrared absorption peak at the position of 930~936 cm^-1 first increased and then decreased, while the peak at 980~995 cm^-1 monotonically increased.When SO₂ and O₂ coexisted in the gas, it could react with Ca(OH)₂ to form CaSO₄. When NO₂ and SO₂ were simultaneously removed by Ca(OH)₂ in the absence of O₂, the ratio of produced NO/consumed NO₂ was around 1:1, but in the presence of O₂, the content of Ca(NO₃)₂ increased significantly, and the formation rate of CaSO₄ was accelarated in the early stage of reation.
- simultaneous desulfurization and denitration,
- CaSO₃ oxidation,
- gas-solid reaction,
- DRIFT,
- fixed bed experiment

FullText(HTML)

References(29)

References

中华人民共和国国家统计局. 年度数据:废气中主要污染物排放[R]. 2017. http://data.stats.gov.cn.

赵雪,程茜,侯俊先.脱硫脱硝行业2017年发展综述[J].中国环保产业,2018(7):10-24.

ZHENG C H, XU C R, GAO X, et al. Simultaneous absorption of NO_x and SO₂ in oxidant-enhanced limestone slurry[J]. Environmental Progress & Sustainable Energy, 2014, 33(4):1171-1179.

朱晓华,李鹏飞,程正霖, 等.低温烟气循环流化床同时脱硫脱硝技术在津西钢铁厂的应用[J].环境工程,2018,36(12):21-25.

陈国庆,高继慧,黄启龙, 等. 钙基脱硫工艺协同脱硝技术研究进展[J].化工进展,2015,34(10):3755-3761.

TSUCHIAI H, ISHIZUKA T, NAKAMURA H, et al. Removal of sulfur dioxide from flue gas by the absorbent prepared from coal ash:effects of nitrogen oxide and water vapor[J]. Industrial & Engineering Chemistry Research, 1996, 35(3):851-855.

张虎. 常温钙基吸收剂同时脱除NO_x/SO₂的实验研究[D]. 北京:清华大学, 2006.

SAKAI M, CAILI SU A, SASAOKA E. Simultaneous removal of SO_x and NO_x using slaked lime at low temperature[J]. Industrial & Engineering Chemistry Research, 2002, 41(20):5029-5033.

SONG Q, KOSHI M, SADAKATA. Investigation on promising additives for simultaneous oxidation of NO and SO₂ in flue gas by numerical simulation[J].Chinese Journal of Chemical Engineering,2003,11(5):45-49.

LITTLEJHON D, WANG Y Z, CHANG S G. Oxidation of aqueous sulfite ion by nitrogen-dioxide[J]. Environmental Science & Technology, 1993, 27(10):2162-2167.

BAUSACH M, PERA-TITUS M, FITÉ C, et al. Enhancement of gas desulfurization with hydrated lime at low temperature by the presence of NO₂[J]. Industrial & Engineering Chemistry Research, 2005, 44(24):9040-9049.

张晓闻. 常温钙基同时脱硫脱硝机理[D].北京:清华大学, 2008.

李鹏飞. 反应条件对钙基吸收剂脱除NO_x/SO₂效果影响的实验研究[D].北京:清华大学, 2009.

CHEN G Q, GAO J H, GAO J M, et al. Simultaneous removal of SO₂ and NO_x by calcium hydroxide at low temperature:effect of SO₂ absorption on NO₂ removal[J]. Industrial & Engineering Chemistry Research, 2010, 49(23).

BALTRUSAITIS J, SCHUTTLEFIELD J, JENSEN J H, et al. FTIR spectroscopy combined with quantum chemical calculations to investigate adsorbed nitrate on aluminium oxide surfaces in the presence and absence of co-adsorbed water[J]. Physical Chemistry Chemical Physics, 2007, 9(36):4970-4980.

LOW M J D, GOODSEI A J, TAKEZAW N. Reactions of gaseous pollutants with solids. i. infrared study of the sorption of SO₂ on CaO[J]. Environmental Science & Technology, 1971, 5(12):1191-1195.

WILDE J D, MARIN G B. Investigation of simultaneous adsorption of SO₂ and NO_x on Na-alumina with transient techniques[J]. Catalysis Today, 2000, 62(4):319-328.

USHER C, AL-HOSNEY H, CARLOS-CUELLAR S, et al. A laboratory study of the heterogeneous uptake and oxidation of sulfur dioxide on mineral dust particles[J]. Journal of Geophysical Research:Atmospheres, 2002, 107(D23):161-169.

LEE K T, BHATIA S, MOHAMED A R. Removal of sulfur dioxide using absorbent synthesized from coal fly ash:Role of oxygen and nitrogen oxide in the desulfurization reaction[J]. Chemical Engineering Science, 2005, 60(12):3419-3423.

ELFVING P, PANAS I, LINDQVIST O. Model study of the first steps in the deterioration of calcareous stone. I. Initial surface sulphite formation on calcite[J]. Applied Surface Science, 1994, 74:91-98.

李天津,禚玉群,陈昌和, 等. 含水条件下多组分污染气体的FTIR同时在线测量[J]. 清华大学学报(自然科学版), 2008,48:(11):1971-1975.

NAKAMOTO K. Infrared and Raman Spectra of Inorganic and Coordination Compounds[M]. Part A and Part B, Two Volume Set, 6 Edition. Wiley, 2009.

KRAMMER G, BRUNNER C, KHINAST J, et al. Reaction of Ca(OH)₂ with SO₂ at Low Temperature[J]. Industrial & Engineering Chemistry Research, 1997, 36(5):1410-1418.

NELLI C H, ROCHELLE G T. Simultaneous sulfur dioxide and nitrogen dioxide removal bycalcium hydroxide and calcium silicate solids[J]. Journal of the Air & Waste Management Association, 1998,48(9):819-828.

GLEASON J F, HOWARD C J. ChemInform abstract:temperature dependence of the gas-phase reaction HOSO₂+O₂→HO₂+SO₃[J]. ChemInform, 1988, 19(37):3414-3417.

CHEN G Q, GAO J H, WANG S, et al. Enhancement effects of gas components on NO removal by calcium hydroxide[J]. Industrial & Engineering Chemistry Research, 2010, 49(3):1450-1456.

李平. SO₂对负载型催化剂上NO氧化过程的影响[D]. 上海:华东理工大学, 2003.

WILDE J D, MARIN G B. Investigation of simultaneous adsorption of SO₂ and NO_x on Na-γ-alumina with transient techniques[J]. Catalysis Today, 2000, 62(4):319-328.

GOODSEL A J, LOW M J D, NOBUTSUNE T. Reactions of Gaseous Pollutants with solids. Ⅱ. Sorption of SO₂ on MgO[J]. Environmental Science & Technology,1972,6(3):268-273.

Relative Articles

Supplements(0)

Cited By

Proportional views