抑制性气氛中菱镁矿分解特性与动力学研究

doi:10.19964/j.issn.1006-4990.2022-0696

Abstract

Abstract:

Decomposition reaction characteristic of magnesite in the inhibitory atmosphere containing product gases was investigated by thermogravimetric analyzer（TGA）.The kinetic parameters were calculated based on the Flynn-Wall-Ozawa and Coats-Redfern methods.It was shown that the decomposition of magnesite was seriously inhibited as CO₂concentration increasing.Both the initial decomposition temperature and apparent activation energy were increased logarithmically but the temperature corresponding to the maximum reaction rate was increased exponentially with increasing CO₂ concentration.The decomposition of magnesite in the atmosphere with different CO₂ concentrations was followed the nucleation and growth control model G（x）=-ln（1-x）.This study would provide basic theoretical data for magnesite calcination and resource utilization in actual industry.

Key words: thermogravimetry, magnesite, inhibitory atmosphere, reaction kinetics, decomposition

CLC Number:

TQ132.2

LI Xiyan, ZHANG Hong, LIU Xuejing, YANG Hao, XU Shuai, LI Jiaxin, XIE Jiaqi, XU Guangwen. Study on decomposition characteristic and kinetics of magnesite in inhibitory atmosphere[J]. Inorganic Chemicals Industry, 2023, 55(10): 50-55.

Figures/Tables 13

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References 18

1	宋闯.菱镁矿尾矿处理与再利用研究进展［J］.环境保护与循环经济，2022，42（3）：12-15.
	SONG Chuang.Research progress in the treatment and reuse of magnesite tailings［J］.Environmental Protection and Circular Economy，2022，42（3）：12-15.
2	丁怡，李军生，王风，等.中国菱镁产业发展现状及趋势［J］.佛山陶瓷，2021，31（11）：1-5，12.
	DING Yi， LI Junsheng， WANG Feng，et al.Current situation and trend of Chinese magnesite industry［J］.Foshan Ceramics，2021，31（11）：1-5，12.
3	彭强，郭玉香，曲殿利.菱镁矿热分解的动力学研究［J］.硅酸盐通报，2017，36（6）：1886-1890.
	PENG Qiang， GUO Yuxiang， QU Dianli.Thermal decomposition kinetics analysis of magnesite［J］.Bulletin of the Chinese Ceramic Society，2017，36（6）：1886-1890.
4	ZHAO Yuna， ZHU Guocai.Thermal decomposition kinetics and mechanism of magnesium bicarbonate aqueous solution［J］.Hydrometallurgy，2007，89（3/4）：217-223.
5	鲁志燕，韩露，吴锋，等.新疆尖山菱镁矿一步煅烧制备烧结镁砂［J］.耐火材料，2022，56（2）：158-161.
	LU Zhiyan， HAN Lu， WU Feng，et al.Preparation of sintered magnesia by one-step calcination from Xinjiang Jianshan magnesite［J］.Refractories，2022，56（2）：158-161.
6	陈建铭，牛晓红，王晓彤，等.采用定-转子碳化反应器制备高活性氧化镁［J］.无机盐工业，2016，48（12）：40-43.
	CHEN Jianming， NIU Xiaohong， WANG Xiaotong，et al.Preparation of highly active magnesium oxide by rotor-stator reactor（RSR）［J］.Inorganic Chemicals Industry，2016，48（12）：40-43.
7	李会东，杨莉萍，陶冶，等.玻璃纤维可燃物含量的热重分析方法研究［J］.玻璃纤维，2022（4）：36-42.
	LI Huidong， YANG Liping， TAO Ye，et al.Research on thermogravimetric analysis for combustible content in glass fiber［J］.Fiber Glass，2022（4）：36-42.
8	TIAN Lu， TAHMASEBI A， YU Jianglong.An experimental study on thermal decomposition behavior of magnesite［J］.Journal of Thermal Analysis and Calorimetry，2014，118（3）：1577-1584.
9	白丽梅，邓玉芬，韩跃新，等.微细菱镁矿热分解过程及动力学［J］.东北大学学报（自然科学版），2018，39（3）：398-403.
	BAI Limei， DENG Yufen， HAN Yuexin，et al.Thermal decomposition process and kinetics of microfine magnesite［J］.Journal of Northeastern University（Natural Science），2018，39（3）：398- 403.
10	王樱澈，刘雪景，许光文.含CO₂抑制性气氛中菱镁矿分解反应动力学研究［J］.辽宁化工，2020，49（12）：1475-1478.
	WANG Yingche， LIU Xuejing， XU Guangwen.Kinetics of decomposition of magnesite in inhibitory atmosphere containing CO₂ ［J］.Liaoning Chemical Industry，2020，49（12）：1475-1478.
11	LIU Xuejing， HAO Wenqian， WANG Kexin，et al.Acquiring real kinetics of reactions in the inhibitory atmosphere containing product gases using micro fluidized bed［J］.AIChE Journal，2021，67（9）：17325.
12	YOUSEFZAD FARROKHI F， KAZANÇ F.Combustion behavior and kinetics of Turkish lignite blended with biomass/magnesite dust［J］.Journal of Energy Engineering，2018，144（6）：04018064.
13	曾玺，王芳，余剑，等.微型流化床反应分析的方法基础与应用研究［J］.化工进展，2016，35（6）：1687-1697.
	ZENG Xi， WANG Fang， YU Jian，et al.Fundamentals and applications of micro fluidized bed reaction analysis［J］.Chemical Industry and Engineering Progress，2016，35（6）：1687-1697.
14	任伟康，刘百宽，田晓利.新疆和静菱镁矿热分解特性及轻烧工艺研究［J］.硅酸盐通报，2016，35（11）：3556-3561，3568.
	REN Weikang， LIU Baikuan， TIAN Xiaoli.Thermal decomposition and light burning process of Xinjiang Hejing magnesite［J］.Bulletin of the Chinese Ceramic Society，2016，35（11）：3556-3561，3568.
15	刘欣伟，冯雅丽，李浩然.菱镁矿热分解微分方程的建立［J］.无机盐工业，2011，43（11）：15-18.
	LIU Xinwei， FENG Yali， LI Haoran.Establishment of differential equations of magnesite thermal decomposition［J］.Inorganic Chemicals Industry，2011，43（11）：15-18.
16	TIAN L N， CHEN H P， YANG H P，et al.Study of limestone thermal decomposition in O₂/CO₂ atmosphere［C］∥International Symposium on Coal Combustion.Berlin，Heidelberg：Springer，2013：1283-1289.
17	姜微微，郝文倩，刘雪景，等.微型流化床内菱镁矿轻烧反应特性及动力学［J］.化工学报，2019，70（8）：2928-2937.
	JIANG Weiwei， HAO Wenqian， LIU Xuejing，et al.Characteristic and kinetics of light calcination of magnesite in micro fluidized bed reaction analyzer［J］.CIESC Journal，2019，70（8）：2928-2937.
18	MAITRA S， MUKHERJEE S， SAHA N，et al.Non-isothermal decomposition kinetics of magnesite［J］.Ceramic，2007，53（327）：284-287.

气氛	G（x）	β→0	β=5 ℃/min		β=10 ℃/min		β=20 ℃/min
气氛	G（x）	E/ （kJ∙mol^-1）	E/ （kJ∙mol^-1）	R	E/ （kJ∙mol^-1）	R	E/ （kJ∙mol^-1）	R
30%CO₂	G（x）=-ln（1-x）	344	324	0.999	318	0.999	241	0.996
	G（x）=1-（1-x）^1/2	258	287	0.996	265	0.999	201	0.999
	G（x）=1-（1-x）^1/3	275	305	0.998	282	0.999	214	0.999
50%CO₂	G（x）=-ln（1-x）	361	403	0.999	326	0.998	289	0.999
	G（x）=1-（1-x）^1/2	301	273	0.998	241	0.999	231	0.995
	G（x）=1-（1-x）^1/3	320	290	0.999	256	0.999	245	0.997

气氛	E/（kJ∙mol^-1）	G（x）	ln A
无CO₂	196	G（x）=-ln（1-x）	15.6
10%CO₂	291	G（x）=-ln（1-x）	33.8
30%CO₂	371	G（x）=-ln（1-x）	37.6
50%CO₂	427	G（x）=-ln（1-x）	39.6
100%CO₂	537	G（x）=-ln（1-x）	43.5

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Study on decomposition characteristic and kinetics of magnesite in inhibitory atmosphere

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