矿物基硫酸镁热化学吸附材料的制备与性能评价

doi:10.19799/j.cnki.2095-4239.2022.0429

储能科学与技术 ›› 2023, Vol. 12 ›› Issue (1): 42-50.doi: 10.19799/j.cnki.2095-4239.2022.0429

矿物基硫酸镁热化学吸附材料的制备与性能评价

张叶龙¹(), 苗琪²^,³, 宋鹏飞¹, 谈玲华²^,³, 金翼¹(), 丁玉龙⁴

^1.江苏金合能源科技有限公司，江苏句容 212499
^2.南京理工大学化学与化工学院
^3.南京理工大学国家特种超细粉体工程技术研究中心，江苏南京 210094
^4.英国伯明翰大学，英国伯明翰 B15 2TT

收稿日期:2022-08-03 修回日期:2022-08-12 出版日期:2023-01-05 发布日期:2023-02-08
通讯作者: 金翼 E-mail:ZYL1988219@163.com;yi.jin@jinhe-energy.com
作者简介:张叶龙（1988—），男，博士，工程师，研究方向为储热材料及系统，E-mail：ZYL1988219@163.com；
基金资助:
国家重点研发计划项目“变革性技术关键科学问题”专项(2018YFA0702300);句容市科技成果转化项目(ZA12102)

Preparation and performance evaluation of mineral-based magnesium sulfate thermochemical adsorption materials

Yelong ZHANG¹(), Qi MIAO²^,³, Pengfei SONG¹, Linghua TAN²^,³, Yi JIN¹(), Yulong DING⁴

^1.Jiangsu Jinhe Energy Technology Company Limited, Jurong 212499, Jiangsu, China
^2.School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology
^3.National Special Superfine Powder Engineering Research Center of China, Nanjing 210094, Jiangsu, China
^4.University of Birmingham, Birmingham B15 2TT, UK

Received:2022-08-03 Revised:2022-08-12 Online:2023-01-05 Published:2023-02-08
Contact: Yi JIN E-mail:ZYL1988219@163.com;yi.jin@jinhe-energy.com

摘要/Abstract

摘要：

本工作以凹凸棒土、硅藻土和膨胀蛭石三种矿物材料为载体，采用等体积浸渍法制备了矿物基硫酸镁热化学吸附材料。通过X射线衍射(XRD)、扫描电子显微镜(SEM)和比表面积与孔结构测试表征了矿物载体与矿物基硫酸镁复合材料的微观结构，并基于热失重(TG)、动态水蒸气吸附(DVS)和差示扫描量热(DSC)测试对复合材料的吸附/脱附动力学性能和储热性能进行了评价。研究发现，硅藻土的圆盘形微观结构有利于复合材料获得更快的脱附/吸附反应速率和更高的储热能力，其脱附反应热可达557.1 kJ/kg。此外，环境温度25 ℃、相对湿度85%为矿物基硫酸镁复合材料的最佳吸附反应条件。

关键词: 硫酸镁, 矿物基, 热化学储热, 吸附

Abstract:

In this study, mineral materials such as the attapulgite, the diatomite, and the expanded vermiculite were used as carriers to create mineral-based magnesium sulfate thermochemical adsorption materials using the equivalent-volume impregnation approach. The microstructures of mineral carriers and mineral-based magnesium sulfate composites were evaluated by X-ray diffraction, scanning electron microscopy, and specific surface area and pore structure tests. The adsorption/desorption kinetic and thermal storage performance of mineral-based magnesium sulfate composites were evaluated using thermal weight loss, dynamic water vapor adsorption, and differential scanning calorimetry tests. It was discovered that the disc-shaped microstructure of the diatomite made possible the faster desorption/adsorption reaction rate and greater thermal storage capacity of the composites, and the heat of desorption reaction could reach 557.1 kJ/kg. Additionally, the ambient temperature of 25 ℃ and the relative humidity of 85% were the ideal adsorption reaction conditions for the mineral-based magnesium sulfate composites.

Key words: magnesium sulfate, mineral carrier, thermochemical heat storage, adsorption

中图分类号:

TK 02

张叶龙, 苗琪, 宋鹏飞, 谈玲华, 金翼, 丁玉龙. 矿物基硫酸镁热化学吸附材料的制备与性能评价[J]. 储能科学与技术, 2023, 12(1): 42-50.

Yelong ZHANG, Qi MIAO, Pengfei SONG, Linghua TAN, Yi JIN, Yulong DING. Preparation and performance evaluation of mineral-based magnesium sulfate thermochemical adsorption materials[J]. Energy Storage Science and Technology, 2023, 12(1): 42-50.

图/表 15

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载体	SiO₂/%	Al₂O₃/%	Na₂O/%	Fe₂O₃/%	MgO/%	K₂O/%	CaO/%	TiO₂/%	P₂O₅/%	Cl/%	F/%	灰分/%
A	69.87	18.03	2.50	3.54	1.94	1.88	1.26	0.71	0.10	0	0	0.17
D	90.90	3.72	2.54	0.92	0.36	0.62	0.37	0.16	0	0.22	0	0.19
EV	51.60	20.18	0.96	6.24	11.89	4.83	1.95	1.39	0.13	0.10	0.40	0.33

样品	比表面积/(m²/g)	孔体积/(cm²/g)	平均孔径/nm
A	27.78	0.039	6.33
D	24.40	0.079	11.09
EV	21.56	0.061	11.56
AM	7.11	0.027	12.89
DM	6.71	0.021	10.30
EVM	7.98	0.029	12.56

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矿物基硫酸镁热化学吸附材料的制备与性能评价

Preparation and performance evaluation of mineral-based magnesium sulfate thermochemical adsorption materials

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