电石渣/碳酸镁体系的热分解行为与机制研究

doi:10.19964/j.issn.1006-4990.2024-0140

Abstract

Abstract:

A carbide slag/magnesium carbonate system was synthesized by mechanical mixing method.Thermal decomposition behavior and mechanism under high temperature conditions were studied from three aspects of component ratio，heating rate，and pyrolysis atmosphere.The results indicated that the thermal decomposition of this carbide slag/MgCO₃ system with different ratios could be divided into three stages and displayed similar trends.As the amount of magnesium in the samples increased，the decomposition temperature of the samples in the first stage was dropped from 387 ℃ to 361 ℃，while the weight loss rate was increased from 16.0% to 18.0%.The decomposition temperature of the samples in the second stage maintained steady with the weight loss rate increasing from 13.2% to 17.1%.The changes in the third stage of the decomposition temperature and weight loss rate of the samples were minimal which could attribute to the formation of stable metal oxides.The thermogravimetric curve of the carbide slag/MgCO₃ system gradually shifted towards higher temperatures with the increasing heating rate，and its apparent activation energy was increased with the magnitude of magnesium.The weight of the carbide slag/MgCO₃ system displayed the tendency of firstly increased and then decreased under CO₂atmosphere.CO₂ released from the decomposition of MgCO₃ was absorbed by Ca（OH）₂ within the same reaction temperature range.The prepared carbide slag/magnesium carbonate agent system exhibited a more abundant porous structure with Ca and Mg elements dispersed uniformly on the adsorbent surface，which effectively enhanced the anti⁃sintering properties of the carbide slag/MgCO₃ system.The reaction mechanism during the thermal decomposition process of the carbide slag/MgCO₃ system was revealed that provided theoretical support for the preparation of calcium carbide slag adsorbents with strong CO₂ capture capacity and cycling stability.

Key words: carbide slag, magnesium carbonate, thermal decomposition, high temperature, crystalline structure

CLC Number:

TQ132.2

QI Xingzhao, WANG Feng, WU Jie, ZHANG Qi, TANG Zhongfeng. Study on pyrolysis behavior and mechanism of calcium carbide slag/magnesium carbonate system[J]. Inorganic Chemicals Industry, 2024, 56(10): 118-126.

Figures/Tables 11

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References 23

1	邵岚，马丽萍，杨杰，等.电石渣的资源化利用现状［J］.现代化工，2024，44（3）：79-83.
	SHAO Lan， MA Liping， YANG Jie，et al.Re⁃utilization status of carbide slag［J］.Modern Chemical Industry，2024，44（3）：79-83.
2	赵珂萍，李晓玉，李瑞红，等.固废源CaO基CO₂捕集材料的制备与捕集性能研究进展［J］.硅酸盐通报，2023，42（2）：520- 530.
	ZHAO Keping， LI Xiaoyu， LI Ruihong，et al.Research progress on preparation and capture performance of CaO-based CO₂ capture materials from solid wastes［J］.Bulletin of the Chinese Ceramic Society，2023，42（2）：520-530.
3	季洪峰，李灿华，都刚，等.固废源钙基碳捕集剂制备及抗烧结性研究进展［J］.无机盐工业，2023，55（3）：28-35.
	JI Hongfeng， LI Canhua， DU Gang，et al.Research progress of preparation and sintering resistance of calcium⁃based CO₂ trapping materials from solid waste sources［J］.Inorganic Chemicals Industry，2023，55（3）：28-35.
4	GENG Yiqi， GUO Yanxia， FAN Biao，et al.Research progress of calcium⁃based adsorbents for CO₂ capture and anti⁃sintering modification［J］.Journal of Fuel Chemistry and Technology，2021，49（7）：998-1013.
5	LING Changjian， WANG Zirui， TANG Zhongfeng.Performance improvement of Na₄SiO₄ doped with Li₂CO₃-K₂CO₃ for high⁃temperature CO2 capture and thermochemical energy storage［J］.Chemical Engineering Journal，2023，476：146921.
6	WANG Zirui， LIU Weihua， LING Changjian，et al.CO₂ capture behavior and chemical structure of the alkali zirconate⁃silicate hybrid sorbent from ZrSiO₄ by alkali activation method［J］.Journal of CO2 Utilization，2021，51：101639.
7	BIAN Zhiguo， LI Yingjie， ZHANG Chunxiao，et al.CaO/Ca（OH）₂ heat storage performance of hollow nanostructured CaO-based material from Ca-looping cycles for CO₂ capture［J］.Fuel Processing Technology，2021，217：106834.
8	匡盛铎，陈炜，林文升，等.Mg/Y改性Ca基吸附剂强化吸附CO₂试验［J］.洁净煤技术，2022，28（10）：195-202.
	KUANG Shengduo， CHEN Wei， LIN Wensheng，et al.Enhanced adsorption of CO₂ by Mg/Y modified Ca-based adsorbents［J］.Clean Coal Technology，2022，28（10）：195-202.
9	王久衡，荣鼐，刘开伟，等.水蒸气强化纤维素模板改性钙基吸附剂固碳性能及强度［J］.化工进展，2023，42（6）：3217-3225.
	WANG Jiuheng， RONG Nai， LIU Kaiwei，et al.Enhanced CO₂ capture performance and strength of cellulose⁃templated CaO-based pellets with steam reactivation［J］.Chemical Industry and Engineering Progress，2023，42（6）：3217-3225.
10	LI Ping， CHEN Ran， LIN Yunan，et al.General approach to facile synthesis of MgO-based porous ultrathin nanosheets enabling high⁃efficiency CO₂ capture［J］.Chemical Engineering Journal，2021，404：126459.
11	吴爽，刘瑞，丁巍巍，等.Al₂O₃掺杂CaO吸附剂长周期CO₂捕集性能研究［J］.低碳化学与化工，2024（5）：81-87.
	WU Shuang， LIU Rui， DING Weiwei，et al.Long⁃term CO₂ capture performance of Al₂O₃-doped CaO adsorbent［J］.Low Carbon Chemistry and Chemical Industry，2024（5）：81-87.
12	许春辉，王峰，凌长见，等.熔盐改性的金属氧化物捕获二氧化碳研究进展［J］.无机盐工业，2023，55（5）：1-7，23.
	XU Chunhui， WANG Feng， LING Changjian，et al.Research progress of CO₂ capture by metal oxides modified by molten sa⁃lts［J］.Inorganic Chemicals Industry，2023，55（5）：1-7，23.
13	PARK J， YI K B.Effects of preparation method on cyclic stability and CO₂ absorption capacity of synthetic CaO-MgO absorbent for sorption⁃enhanced hydrogen production［J］.International Journal of Hydrogen Energy，2012，37（1）：95-102.
14	LI Keke， SUN Jian， ZHANG Yuxuan，et al.Cigarette butt⁃assisted combustion synthesis of dolomite⁃derived sorbents with enhanced cyclic CO₂ capturing capability for direct solar⁃driven calcium looping［J］.Separation and Purification Technology，2023，311：123269.
15	唐玉婷，陈晓斌，马晓茜.Zr-Mg改性吸附剂捕集热解气中CO₂的实验研究［J］.华南理工大学学报（自然科学版），2022，50（7）：118-125，143.
	TANG Yuting， CHEN Xiaobin， MA Xiaoqian.Experiment study of capturing CO₂ from pyrolysis gases by Zr-Mg modified sorbents［J］.Journal of South China University of Technology （Natural Science Edition），2022，50（7）：118-125，143.
16	彭李佳，王银龙，翟宸，等.白云石可控碳化联产氢氧化镁和碳酸钙及其改性［J］.化工进展，2024（4）：1981-1991.
	PENG Lijia， WANG Yinlong， ZHAI Chen，et al.Controlled carbonization of dolomite for co⁃production of magnesium hydroxide and calcium carbonate and its modification［J］.Progress in Che⁃mical Engineering，2024（4）：1981-1991.
17	桂昌青，王雅静，凌长见，等.氧化镁基二氧化碳吸附剂的制备及改性研究进展［J］.无机盐工业，2023，55（8）：77-83.
	GUI Changqing， WANG Yajing， LING Changjian，et al.Research progress of preparation and modification of MgO-based CO₂ adsorbents［J］.Inorganic Chemicals Industry，2023，55（8）：77-83.
18	ZHANG Jianyu， CAO Qi， LIU Hongpan，et al.Thermal decomposition kinetics of carbide slag in air atmosphere［J］.IOP Conference Series：Earth and Environmental Science，2019，227：052065.
19	张雷，田园，路春美.工业废弃物煅烧动力学的热重分析与研究［J］.煤炭学报，2011，36（4）：681-686.
	ZHANG Lei， TIAN Yuan， LU Chunmei.Thermogravimetric analysis and study on calcination kinetics of industrial wastes［J］.Journal of China Coal Society，2011，36（4）：681-686.
20	马晓宇，刘波，陈功，等.N₂、CO₂气氛下菱镁矿热分解的动力学机理［J］.过程工程学报，2024.Doi：10.12034/j.issn.1009-606X.223345.
	MA Xiaoyu， LIU Bo， CHEN Gong，et al.Kinetic mechanism of thermal decomposition of magnesite under N₂ and CO₂ atmosphere［J］.Journal of Process Engineering，2024.Doi：10.12034/j.issn.1009-606X.223345.
21	张星，徐杰，王子兵，等.原料粒径对石灰石热分解反应动力学影响［J］.无机盐工业，2023，55（2）：79-84.
	ZHANG Xing， XU Jie， WANG Zibing，et al.Effect of feedstock particle size on kinetics of limestone thermal decomposition reaction［J］.Inorganic Chemicals Industry，2023，55（2）：79-84.
22	SCHAUBE F， KOCH L， WÖRNER A，et al.A thermodynamic and kinetic study of the de⁃and rehydration of Ca（OH）₂ at high H₂O partial pressures for thermo⁃chemical heat storage［J］.Thermochimica Acta，2012，538：9-20.
23	CHEN Dun， GAO Xiang， DOLLIMORE D.The application of non⁃isothermal methods of kinetic analysis to the decomposition of calcium hydroxide［J］.Thermochimica Acta，1993，215：65-82.

w（Na₂O）	w（MgO）	w（Al₂O₃）	w（SiO₂）	w（P₂O₅）	w（SO₃）
0.72	0.30	2.48	5.30	0.07	2.30
w（Cl）	w（CaO）	w（TiO₂）	w（Fe₂O₃）	w（SrO）
0.45	87.65	0.13	0.53	0.07

名称	主要成分	m（电石渣）/ m（MgCO₃）	实验条件
CS	Ca（OH）₂		烘干后CS在N₂气氛下以5、10、15 ℃/min的升温速率由25 ℃升温至950 ℃；在CO₂气氛下以10 ℃/min 的升温速率由25 ℃升温至950 ℃
CM91	Ca（OH）₂/MgCO₃	9∶1	烘干后的电石渣和MgCO₃按照质量比为9∶1机械混合，在N₂气氛下以5、10、15 ℃/min的升温速率由25 ℃升温至950 ℃；在CO₂气氛下以10 ℃/min的升温速率由25 ℃升温至950 ℃
CM82	Ca（OH）₂/MgCO₃	8∶2	烘干后的电石渣和MgCO₃按照质量比为8∶2机械混合，在N₂气氛下以5、10、15 ℃/min的升温速率由25 ℃升温至950 ℃；在CO₂气氛下以10 ℃/min的升温速率由25 ℃升温至950 ℃
CM73	Ca（OH）₂/MgCO₃	7∶3	烘干后的电石渣和MgCO₃按照质量比为7∶3机械混合，在N₂气氛下以5、10、15 ℃/min的升温速率由25 ℃升温至950 ℃；在CO₂气氛下以10 ℃/min的升温速率由25 ℃升温至950 ℃
MC	MgCO₃		烘干后MC在N₂气氛下以5、10、15 ℃/min的升温速率由25 ℃升温至950 ℃；在CO₂气氛下以10 ℃/min 的升温速率由25 ℃升温至950 ℃

样品名称	第一阶段分解温度/℃	第一阶段质量损失率/%	第二阶段分解温度/℃	第二阶段质量损失率/%	分解结束温度/ ℃	第三阶段质量损失率/%
CS	390	15.9	569	11.6	649	0.4
CM91	387	16.0	574	13.2	684	0.9
CM82	381	16.4	576	15.1	680	0.7
CM73	361	18.0	573	17.1	679	0.6

升温速率/ （℃·min^-1）	前一阶段失重			后一阶段失重
升温速率/ （℃·min^-1）	起始温度/℃	峰温/ ℃	质量损失率/%	起始温度/℃	峰温/ ℃	质量损失率/%
5	353	410	14.4	550	622		16.7
10	361	435	10.8	594	667		17.1
15	367	441	9.9	612	668		17.2

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Study on pyrolysis behavior and mechanism of calcium carbide slag/magnesium carbonate system

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