二氧化碳浓度对石灰石分解反应动力学的影响

doi:10.11962/1006-4990.2019-0209

Abstract

Abstract:

Thermal decomposition characteristics of limestone were studied by thermal gravimetric differential scanning calorimetry（TG-DSC） under different concentrations of CO₂（mixture of CO₂ and air）.The TG and DSC curves obtained from the experimental results showed that the decomposition of calcium carbonate was an endothermic reaction,and the reaction range was mainly in the range of 750~950 ℃;with the increasing of heating rate,the reaction speed was increased,and the TG curve was moved to the high temperature region.The DSC curve showed obvious increasing on endothermic peak and endothermic area;with the increasing of concentration of CO₂ in the reaction atmosphere,the TG curve moved slightly to the high temperature region,the reaction initiation temperatures were always same,and the terminal reaction temperature differd by about 20 ℃.In a high concentration CO₂ atmosphere,limestone decomposition followed a random nucleation and subsequent growth model.It provided theoretical support for further optimization of the limestone calcination process and the design of the calciner.

Key words: limestone, CO₂/air atmosphere, calcium carbonate, Coast-Redfern integration

CLC Number:

TQ132.32

Zhang Wenxian,Liu Liansheng,Cao Hejun,Wu Binke,Cheng Zhenpeng. Effect on kinetics of limestone decomposition under different CO₂ atmospheres[J]. Inorganic Chemicals Industry, 2020, 52(3): 59-63.

Figures/Tables 6

References 20

[1]	郭汉杰, 尹志明, 王宏伟 . 冶金活性石灰烧制过程最佳工艺制度[J]. 北京科技大学学报, 2008,30(2):148-151.
[2]	李宏, 曲英 . 氧气转炉炼钢用石灰石代替石灰节能减排初探[J]. 中国冶金, 2010,20(9):45-48.
[3]	汤明伟 . 一种石灰窑尾气分离提纯工艺技术研究及应用[J]. 中国氯碱, 2017(5):42-44.
[4]	杨磊, 许兴存 . 燃煤电厂锅炉尾气排放脱除CO₂的流程模拟及研究[J]. 资源节约与环保, 2014(9):133-134.
[5]	黄希祜 . 钢铁冶金原理[M]. 3版.北京: 冶金工业出版社, 2002.
[6]	陈凯锋, 薛正良, 李建立 . 高温煅烧下快速加热石灰石的热分解反应动力学[J]. 硅酸盐学报, 2016,44(5):754-762.
[7]	胡彬, 薛正良, 白莎 , 等. 石灰石高温快速煅烧分解反应动力学研究[J]. 炼钢, 2017,33(1):56-61.
[8]	王世杰 . 水泥预分解窑系统内生料分解、煤粉燃烧与NO_x控制研究[D]. 武汉:华中科技大学, 2006.
[9]	范浩杰, 章明川, 吴国新 , 等. 碳酸钙热分解的机理研究[J]. 动力工程, 1998,18(5):40-43.
[10]	Criado J M, González M, Málek J , et al. The effect of the CO₂ pres-sure on the thermal decomposition kinetics of calcium carbona-te[J]. Thermochimical Acta, 1995,254:121-127.
[11]	Wei H, Luo Y . A study on the kinetics of thermal decomposition of CaCO₃[J]. Journal of Thermal Analysis, 1995,45(1/2):303-310.
[12]	郑瑛, 陈小华, 周英彪 , 等. CaCO₃分解机理和动力学参数的研究[J]. 华中科技大学学报:自然科学版, 2002,30(12):86-88.
[13]	郑瑛, 宋侃, 池保华 , 等. 二氧化碳气氛下碳酸钙热分解动力学研究[J]. 华中科技大学学报:自然科学版, 2007,35(8):87-89.
[14]	曹静, 乔秀臣, 柳成亮 , 等. 石灰石在二氧化碳与空气混合气氛下的分解动力学[J]. 无机盐工业, 2016,48(12):32-36.
[15]	李辉, 张乐乐, 段永华 , 等. 高二氧化碳浓度下石灰石的热分解反应动力学[J]. 硅酸盐学报, 2013,41(5):637-643.
[16]	Ávila I, Crnkovic P M, Milioli F E , et al. Thermal decomposition kinetics of Brazilian limestones:effect of CO₂ partial pressure[J]. Environmental Technology, 2012,33(10):1175-1182.
[17]	郑瑛, 陈小华, 郑楚光 . CaCO₃分解机理的研究[J]. 动力工程, 2004,24(2):280-284.
[18]	日本化学会. 无机固态反应[M]. 董万堂, 董绍俊译.北京:科学出版社, 1985.
[19]	冯云, 陈延信 . 碳酸钙的分解动力学研究进展[J]. 硅酸盐通报, 2006,25(3):140-145,154.
[20]	胡荣祖, 史启祯 . 热分析动力学[M]. 2版.北京: 科学出版社, 2008.

化学成分	质量分数/%	化学成分	质量分数/%
CaO	54.542	K₂O	0.074
SiO₂	0.624	SO₃	0.039
Fe₂O₃	0.260	其他	0.145
Al₂O₃	0.224	烧失量	43.900
MgO	0.192

φ（CO₂）/ %	n	E/（kJ·mol^-1）	A/min^-1	R²	E/（kJ·mol^-1）	A/min^-1	R²	E/（kJ·mol^-1）	A/min^-1	R²
φ（CO₂）/ %	n	10 ℃/min			12 ℃/min			14 ℃/min
25	1	346.976 3	7.74×10¹⁰	0.997 36	320.632 2	1.15×10¹¹	0.997 86	304.310 4	1.46×10¹¹	0.997 28
	2/3	203.724 6	4.02×10⁵	0.997 57	207.455 6	5.24×10⁵	0.997 74	209.878 5	6.16×10⁵	0.997 12
	2/1	148.098 7	8.29×10²	0.997 43	150.867 2	1.01×10³	0.997 61	152.662 6	1.14×10³	0.996 94
35	1	379.077 3	5.16×10¹³	0.998 02	348.221 0	6.72×10¹¹	0.997 53	329.216 7	7.54×10¹¹	0.997 32
	2/3	246.379 3	3.26×10⁷	0.997 91	219.128 4	1.83×10⁶	0.997 40	219.759 8	2.08×10⁶	0.997 15
	2/1	180.030 3	2.34×10⁴	0.997 80	159.582 0	2.74×10³	0.997 26	160.031 4	3.13×10³	0.996 97
55	1	397.806 1	9.22×10¹³	0.998 29	376.714 7	9.68×10¹³	0.998 29	355.665 7	1.06×10¹²	0.997 63
	2/3	252.143 8	4.80×10⁷	0.998 19	251.052 3	5.03×10⁷	0.998 00	222.703 0	2.61×10⁶	0.997 48
	2/1	184.312 6	3.14×10⁴	0.998 09	183.221 2	3.29×10⁴	0.998 10	162.221 6	3.71×10³	0.997 32
65	1	401.554 5	3.86×10¹⁴	0.997 83	382.227 8	4.86×10¹³	0.997 42	361.017 9	3.80×10¹²	0.997 64
	2/3	261.305 5	1.26×10⁸	0.997 72	248.392 7	3.30×10⁷	0.997 29	231.580 9	6.20×10⁶	0.997 51
	2/1	191.181 0	6.55×10⁴	0.997 60	181.475 2	2.47×10⁴	0.997 15	168.862 4	7.17×10³	0.997 30

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Inorganic Acid-Base-Salt Committee of CIESC

Effect on kinetics of limestone decomposition under different CO₂ atmospheres

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