Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl<sub>2</sub> composite materials

KE Fanglong; WEN Jian; WEN Han; HU Zhangmao; WANG Wei; XUAN Yanni; CAO Wenguang

doi:10.19799/j.cnki.2095-4239.2025.1097

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Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl₂ composite materials

Energy Storage Materials and Devices | 更新时间：2026-07-13

- Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl₂ composite materials
- Energy Storage Science and Technology Vol. 15, Issue 6, Pages: 2068-2078(2026)
- 作者机构：
  
  长沙理工大学能源与动力工程学院，湖南长沙 410114
- 作者简介：
- 基金信息：
- DOI：10.19799/j.cnki.2095-4239.2025.1097
  CLC： TK 02
- Received：10 December 2025，
  
  Revised：2025-12-28，
  
  Published：28 June 2026
- 稿件说明：
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柯钫泷, 文健, 温涵, 等. 酸/碱处理对硅藻土微孔结构及硅藻土/CaCl₂复合材料吸附储热性能影响研究[J]. 储能科学与技术, 2026, 15(6): 2068-2078. DOI: 10.19799/j.cnki.2095-4239.2025.1097.

KE Fanglong, WEN Jian, WEN Han, et al. Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl₂ composite materials[J]. Energy Storage Science and Technology, 2026, 15(6): 2068-2078. DOI: 10.19799/j.cnki.2095-4239.2025.1097.
柯钫泷, 文健, 温涵, 等. 酸/碱处理对硅藻土微孔结构及硅藻土/CaCl₂复合材料吸附储热性能影响研究[J]. 储能科学与技术, 2026, 15(6): 2068-2078. DOI: 10.19799/j.cnki.2095-4239.2025.1097. DOI：

KE Fanglong, WEN Jian, WEN Han, et al. Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl₂ composite materials[J]. Energy Storage Science and Technology, 2026, 15(6): 2068-2078. DOI: 10.19799/j.cnki.2095-4239.2025.1097. DOI：

摘要

多孔基质的孔隙结构是决定水合盐热化学储热（TCS）材料性能的关键因素之一。本工作以天然硅藻土为基体，系统研究了酸洗和碱洗对其孔隙结构及硅藻土/CaCl

复合材料储热性能的影响。结果表明，酸洗通过溶解Al

等杂质，显著增加微孔和介孔数量，总孔体积最高提升了28.4%，比表面积最高提升了215.9%；而碱洗则因生成不溶性硅酸钠盐堵塞微孔，导致微孔消失、介孔减少，总孔体积最高降低了37.2%，比表面积最高降低了54.7%。相关性分析结果表明，硅藻土孔隙结构对硅藻土中盐的搭载量、复合材料的吸附和脱附性能都有着非常重要的影响。盐搭载量与孔隙结构中比表面积和总孔体积相关，在高浸渍溶液浓度下相关度达到最高。复合材料的吸附和脱附除了与盐的搭载量相关外，还与硅藻土孔隙结构有关。与原始硅藻土相比，酸洗硅藻土由于微孔和介孔的增加，为水汽提供了更多的通道，其CaCl

复合材料的吸附量最多提升了14.7%，高于盐搭载量的提升幅度；碱洗硅藻土/CaCl

复合材料则因微孔和介孔的减少而使得吸附量最多下降了4.7%，多于盐搭载量的下降幅度。储热性能方面，酸洗硅藻土复合材料在储热密度和循环稳定性上均优于原始硅藻土和碱洗硅藻土/CaCl

复合材料。

Abstract

Pore structure of porous matrices is a key factor determining the performance of thermochemical energy storage materials containing hydrated salts. In this study

natural diatomite was used as the matrix

and the effects of acid and alkali washing on its pore structure and the heat storage performance of diatomite/CaCl

composite materials were systematically investigated. Acid washing significantly increased the number of micropores and mesopores by dissolving impurities such as Al

with the total pore volume and specific surface area improved by up to 28.4% and 215.9%

respectively. In contrast

alkali washing led to the disappearance of micropores and a reduction in mesopores due to the formation of insoluble sodium silicate salts that blocked the micropores

resulting in a maximum decrease of 37.2% in the total pore volume and 54.7% in the specific surface area. Correlation analysis indicated that the pore structure of diatomite exerted a crucial influence on the salt loading capacity in diatomite and the adsorption and desorption properties of the composite materials. The salt loading capacity was correlated with the specific surface area and total pore volume of the pore structure

with the strongest correlation occurring at high impregnation solution concentrations. In addition to the salt loading capacity

the adsorption and desorption of the composite materials were related to the pore structure of diatomite. Compared with pristine diatomite

the acid-washed diatomite provided more channels for water vapor because of the increased number of micropores and mesopores

and the adsorption capacity of its CaCl

composite material was improved by up to 14.7%

which was higher than the increase in the salt loading capacity. In c

ontrast

the adsorption capacity of the alkali-washed diatomite/CaCl

composite materials decreased by up to 4.7% due to the reduced number of micropores and mesopores

which was greater than the decrease in the salt loading capacity. The acid-washed diatomite composite materials outperformed both the pristine diatomite and alkali-washed diatomite/CaCl

composite materials in terms of heat storage density and cycling stability.

关键词

Keywords

references

ZHANG X L, XUN H Y, ZHOU Y F, et al. Research progress on thermochemical adsorption heat storage technology of porous matrix loaded hydrated salt[J]. Journal of Energy Storage, 2025, 128: 117040. DOI:10.1016/j.est.2025.117040.

尹航, 王强, 朱佳华, 等. 耦合光热发电储热-有机朗肯循环的先进绝热压缩空气储能系统热力学分析[J]. 储能科学与技术, 2023, 12(12): 3749-3760. DOI:10.19799/j.cnki.2095-4239.2023.0548.

YIN H, WANG Q, ZHU J H, et al. Thermodynamic analysis of an advanced adiabatic compressed-air energy storage system coupled with molten salt heat and storage-organic Rankine cycle[J]. Energy Storage Science and Technology, 2023, 12(12): 3749-3760. DOI:10.19799/j.cnki.2095-4239.2023.0548.

陈红兵, 李春阳, 王聪聪, 等. 应用于低温集热蓄热的二十二烷-十二醇复合相变材料的制备和性能[J]. 储能科学与技术, 2023, 12(12): 3663-3669.

CHEN H B, LI C Y, WANG C C, et al. Preparation and properties of binary composite phase-change materials based on solar low-temperature heat storage[J]. Energy Storage Science and Technology, 2023, 12(12): 3663-3669.

陈一鸣, 凌浩恕, 刘猛, 等. 沸石/水合盐吸附储热材料制备及性能研究[J]. 储能科学与技术, 2025, 14(7): 2853-2864. DOI:10.19799/j.cnki.2095-4239.2025.0237.

CHEN Y M, LING H S, LIU M, et al. Preparation and performance study of zeolite/hydrated salt adsorption heat storage materials[J]. Energy Storage Science and Technology, 2025, 14(7): 2853-2864. DOI:10.19799/j.cnki.2095-4239.2025.0237.

CLARK R J, GHOLAMIBOZANJANI G, WOODS J, et al. Experimental screening of salt hydrates for thermochemical energy storage for building heating application[J]. Journal of Energy Storage, 2022, 51: 104415. DOI:10.1016/j.est.2022. 104415.

杨慧, 童莉葛, 尹少武, 等. 水合盐热化学储热材料的研究概述[J]. 材料导报, 2021, 35(17): 17150-17162. DOI:10.11896/cldb.2003 0164.

YANG H, TONG L G, YIN S W, et al. A review on the salt hydrate thermochemical heat storage materials[J]. Materials Review, 2021, 35(17): 17150-17162. DOI:10.11896/cldb.20030164.

GAEINI M, SHAIK S A, RINDT C C M. Characterization of potassium carbonate salt hydrate for thermochemical energy storage in buildings[J]. Energy and Buildings, 2019, 196: 178-193. DOI:10.1016/j.enbuild.2019.05.029.

WEI S Y, ZHOU W, HAN R, et al. Influence of minerals with different porous structures on thermochemical heat storage performance of CaCl 2 -based composite sorbents[J ] . Solar Energy Materials and Solar Cells, 2022, 243: 111769. DOI:10.1016/j.solmat.2022.111769.

ZHANG Y L, MIAO Q, JIA X, et al. Diatomite-based magnesium sulfate composites for thermochemical energy storage: Preparation and performance investigation[J]. Solar Energy, 2021, 224: 907-915. DOI:10.1016/j.solener.2021.05.054.

CHEN J N, SU H, SUN H C, et al. Kinetic investigation and numerical simulation of reactor with prepared diatomite/CaCO 3 for high-temperature thermal energy storage application[J ] . Journal of Energy Storage, 2024, 96: 112694. DOI:10.1016/j.est.2024.112694.

GAO N, DENG L S, LI J, et al. Multi-form heat storage perform ance of expanded graphite based CaCl 2 composites for low-grade heat source[J ] . Energy Reports, 2022, 8: 12117-12125. DOI:10.1016/j.egyr.2022.09.051.

LI S Y, HUO Y J, YAN T, et al. Preparation and thermal properties of zeolite/MgSO 4 composite sorption material for heat storage[J ] . Renewable Energy, 2024, 224: 120166. DOI:10.1016/j.renene. 2024.120166.

DING B, XU C, LIAO Z R, et al. Study on long-term thermochemical thermal storage performance based on SrBr 2 -expanded vermiculite composite materials[J ] . Journal of Energy Storage, 2021, 42: 103081. DOI:10.1016/j.est.2021.103081.

REYNOLDS J, ABBAS B, SULLIVAN G, et al. Optimisation of CaCl 2 impregnated expanded graphite and alginate matrices-Targeted salt loading[J ] . Energy Conversion and Management, 2024, 302: 118145. DOI:10.1016/j.enconman.2024.118145.

王义函, 张子成, 刘淑丽, 等. 火山石作为经济可靠的低温储热材料的可行性分析[J]. 动力工程学报, 2024, 44(3): 486-497. DOI:10.19805/j.cnki.jcspe.2024.230482.

WANG Y H, ZHANG Z C, LIU S L, et al. Feasibility analysis of volcanic rocks as an economical and reliable low-temperature heat storage material[J]. Journal of Chinese Society of Power Engineering, 2024, 44(3): 486-497. DOI:10.19805/j.cnki.jcspe.2024.230482.

SIL VESTER L, TOULOUMET Q, KAMARUDDIN A, et al. Influence of silica functionalization on water sorption and thermochemical heat storage of mesoporous SBA-15/CaCl 2 composites[J ] . ACS Applied Energy Materials, 2021, 4(6): 5944-5956.

WEI W J, YANG L X, LI Y L, et al. Experimental and simulation study of two-stage water adsorption in salt porous composites for advanced thermochemical heat storage[J]. Chemical Engineering Journal, 2024, 482: 149096. DOI:10.1016/j.cej.2024.149096.

SALVIATI S, CAROSIO F, CANTAMESSA F, et al. Ice-templated nanocellulose porous structure enhances thermochemical storage kinetics in hydrated salt/graphite composites[J]. Renewable Energy, 2020, 160: 698-706. DOI:10.1016/j.renene.2020.07.036.

MAZUR N, KOTINIS I, HUININK H, et al. Boosting thermochemical performance of SrBr 2 ·6H 2 O with a secondary salt hydrate[J ] . Solar Energy Materials and Solar Cells, 2024, 268: 112748. DOI:10.1016/j.solmat.2024.112748.

LI W, ZENG M, WANG Q W. Development and performance investigation of MgSO 4 /SrCl 2 composite salt hydrate for mid-low temperature thermochemical heat storage[J ] . Solar Energy Materials and Solar Cells, 2020, 210: 110509. DOI:10.1016/j.solmat.2020.110509.

HU Z M, LUO J X, JIN Y H, et al. Experimental study on thermochemical heat storage performance of expanded perlite-based SrCl 2 /CaCl 2 binary hydrated salt composites[J ] . Journal of Energy Storage, 2025, 117: 116199. DOI:10.1016/j.est.2025.11 6199.

ZBAIR M, NGUYEN M H, DUTOURNIÉ P, et al. Bi-salts composites to enhance the hydration kinetics and heat storage capacity[J]. Journal of Energy Storage, 2023, 73: 108862. DOI:10.1016/j.est.2023.108862.

孙忻茹, 张秋怡, 卓建坤, 等. CaCl 2 复合热化学储热材料的研究进展[J ] . 化工进展, 2024, 43(8): 4506-4515. DOI:10.16085/j.issn.1000-6613.2023-1244.

SUN X R, ZHANG Q Y, ZHUO J K, et al. Research progress of CaCl 2 composite thermochemical heat storage materials[J ] . Chemical Industry and Engineering Progress, 2024, 43(8): 4506-4515. DOI:10.16085/j.issn.1000-6613.2023-1244.

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⁰

Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl2 composite materials

DOI：10.19799/j.cnki.2095-4239.2025.1097

摘要

Abstract

关键词

Keywords

references

Research on effects of acid/alkali treatment on microporous structure of diatomite and adsorption and heat storage performance of diatomite/CaCl₂ composite materials