[1] Luo Yonggang**, Li Daji,. Experimental Research on Flue Gas Desulfurizationby Superfine Titanium Dioxied* [J]. Journal of Southeast University (English Edition), 2001, 17 (1): 50-54. [doi:10.3969/j.issn.1003-7985.2001.01.012]

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Experimental Research on Flue Gas Desulfurizationby Superfine Titanium Dioxied^*()

超细TiO₂烟气脱硫的试验研究

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

17

Issue:

2001 1

Page:

50-54

Research Field:

Chemistry and Chemical Engineering

Publishing date:

2001-06-30

Info

Title:

Experimental Research on Flue Gas Desulfurizationby Superfine Titanium Dioxied^*

超细TiO₂烟气脱硫的试验研究

Author(s):

Luo Yonggang^**;  Li Daji

Key Laboratory of Educational Ministry on Clean Coal Power Generation and Combustion Technology, Thermoenergy Engineering Research Institute, Southeast University, Nanjing 210096, China

罗永刚;  李大骥

教育部洁净煤发电与燃烧技术重点实验室, 东南大学热能工程研究所, 南京 210096

Keywords:

FGD;  titanium dioxide;  sol-gel;  physical adsorption;  fixed-bed

烟气脱硫;  二氧化钛;  溶胶-凝胶;  物理吸附;  固定床

PACS:

TQ424.1

DOI:

10.3969/j.issn.1003-7985.2001.01.012

Abstract:

The mechanism of all present adopted desulfurization technologies is chemical reaction. A new kind of desulfurization medium — TiO₂ particle having large fraction void and specific surface area which is made from TiO₂ with superfine size sintered at low temperature and processed with surface activation is tested and investigated. The mechanism of desulfurization is mainly physical adsorption instead of traditional chemical reaction. Four samples of such TiO₂ particles were characterized by advanced instruments and tested for adsorption dynamics at the temperature range of 90 ℃ to 240 ℃ in a fixed bed. The results show that its adsorption ability for SO₂in flue gas is dependent strongly on three factors: quality of TiO₂particles, adsorption temperature and SO₂ concentration in flue gas. Titanium dioxide has well desulfurization character and pretty good prospect in engineering application. Sintered at temperature range from 440 ℃ to 540 ℃, it has the best adsorption ability. In practical use the best adsorption temperature is around 120 ℃.

目前烟气脱硫技术的反应原理多数为化学反应.本文采用一种新型脱硫剂, 即用超细TiO₂粉末经过低温烧结和表面活化制得的高孔隙率, 高比表面积的TiO₂颗粒, 进行烟气脱硫的试验研究, 其脱硫机理主要是物理吸附.在不同吸附温度下, 对4种TiO₂颗粒吸附剂在固定床中进行了动态脱硫试验.试验结果表明, 该吸附剂的脱硫能力主要与以下3个因素有关:TiO₂粒子的品质, 吸附温度以及烟气中SO₂的浓度.TiO

References:

[1] C.Natarajan, and G.Nogami, Cathodic electrodeposition of nanocrystalline Titanium Dioxide thin films, Journal of the Electrochemical Society, vol.143, no.5, pp.1547-1550, 1996
[2] M.R. Stouffer, H. Yoon, and F. P. Burke, Investigation of the mechanisms of flue gas desulfurization by in-duct dry sorbent injection, Industrial Engineering Chemical Research, vol.28, no.1, pp, 20-27, 1989
[3] Y. Otani, H. Emi, I. Uchijima, and H. Nishino, Removal of mercury vapor from air with sulfur impernated adsorbents, Environment Science and Technology, vol.22, no.6, pp.708-711, 1988
[4] Akihiko Aoki, and Gyoichi Nogami, Fabrication of anatase thin films from peroxopoly titanic acid by spray pyrolysis, Journal of the Electrochemical Society, vol.143, no.9, pp.2191-2193, 1996
[5] J. C. Schouten, and C. M. van den Bleek, Influence of oxygen-stoichiometry on desulfurization during FBC: a simple sure modeling approach, In: Proceedings of the 9th International Conference on Fluidized Bed Combustion, vol.2, pp.749-756, 1987

Memo

Memo:

* The project supported by the National Natural Science Foundation of China(59878012)and Southeast University Science Foundation.
** Born in 1967, male, graduate, lecturer.

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