Abstract
Solar selective coatings (SACs) are materials deposited on solar receivers to improve the thermal performance in concentrating solar power (CSP) technologies, by increasing the absorption of solar radiation; however, the manufacture of commercial SACs involves polluting and toxic raw materials and complex processes, which make their production expensive. This study presents the use of activated carbon from coconut shell feedstock (CCSF), as photothermal material, in the formulation of a sustainable and low cost SAC, in conjunction with an acrylic resin as binder. The CCSF was characterized by FTIR, XRD and TGA; optical properties such as diffuse reflectance in UV–Vis–NIR interval were also determined. The adhesion properties of the SAC on aluminum substrates were determined according to ASTM D3359. The physicochemical characterization revealed the presence of amorphous carbon; whereas a diffuse reflectance interval of 5.24–8.96% was found for the SAC, and the highest rating adhesion was obtained.
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Acknowledgments
Paola Martínez-Mireles thanks to CONACYT for the Grant (2021-000001-01NACF). Nancy González-Canché acknowledges to CONACYT, International Development Research Center, IDRC Canada and Centro de Investigaciones y Estudios Superiores en Antropología Social, CIESAS for the postdoctoral fellowship granted and the funding project 60228, through the call “Estancias Posdoctorales para Mujeres Mexicanas Indígenas en Ciencia, Tecnología, Ingeniería y Matemáticas 2019-1. The authors also would like to thank the technical support from MSc Martin Baas with the FTIR and DRX spectroscopy and MSc Christian Albor with the diffuse reflectance measurements. Mónica Noriega is also acknowledged for their technical support in the realization of this work.
Funding
Funding were provided by Consejo Nacional de Ciencia y Tecnología (CONACYT) México (Grant No.: 2021-000001-01NACF), International Development Research Center, IDRC Canadá (Grant No.: 60228-CEAR 2019-04).
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Martínez-Mireles, P.E., Peña-Cruz, M.I., Escobar-Morales, B. et al. Physicochemical and optical properties of a sustainable and low cost solar absorber coating based on activated carbon from coconut shell. MRS Advances 7, 991–996 (2022). https://doi.org/10.1557/s43580-022-00438-5
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DOI: https://doi.org/10.1557/s43580-022-00438-5