Process integration with molten salt-based CSP plants may replace fossil fuels as heat source, however their thermal conductivity together with the limited stability of coatings of receivers restricts utilization beyond 550–560°C. Nanofluids are a revolutionary high thermal conductive heat transfer fluid designed by dispersing appropriate nanoparticles in liquid media that can absorb volumetrically the concentrated solar radiation thus overcoming both aforementioned limitations. Current plastic waste is burnt or dumped in landfills. This wastes have considerable residual organic content, allowing for energy valorization. Molten salt activated catalytic carbonization is a new appealing route to achieve negative CO2 emissions and a circular carbon economy with organic waste. A very interesting result would be the conversion of the carbon content of the low-value waste into high value solid carbon particles dispersed in the molten salt media with the simultaneous recovery of the hydrogen content under the form of a low carbon hydrogen rich fuel gas. In this context we started a study of the thermochemical conversion of polyolefinic plastic wastes in ZnCl2 based molten salts to test the possibility of: i) preparing in a one pot process a C-nanoparticles loaded molten salt-based micro-/nano-nanofluid that can be used in CSP plants equipped with direct absorption solar collectors; ii) quantify the impact of coupling nanofluid-based CSP with chemical processes; and iii) assess the potentiality of the process to achieve sustainable valorization of organic waste materials to be disposed of.
Claudia Prestigiacomo; Federica Proietto; Onofrio Scialdone; Alessandro Galia (8-11/10/2024).Toward the exploitation of plastic wastes as C- sources to produce molten salt-based micro- and nano- dispersed fluid as novel heat transfer media.
Toward the exploitation of plastic wastes as C- sources to produce molten salt-based micro- and nano- dispersed fluid as novel heat transfer media
Claudia Prestigiacomo;Federica Proietto;Onofrio Scialdone;Alessandro Galia
Abstract
Process integration with molten salt-based CSP plants may replace fossil fuels as heat source, however their thermal conductivity together with the limited stability of coatings of receivers restricts utilization beyond 550–560°C. Nanofluids are a revolutionary high thermal conductive heat transfer fluid designed by dispersing appropriate nanoparticles in liquid media that can absorb volumetrically the concentrated solar radiation thus overcoming both aforementioned limitations. Current plastic waste is burnt or dumped in landfills. This wastes have considerable residual organic content, allowing for energy valorization. Molten salt activated catalytic carbonization is a new appealing route to achieve negative CO2 emissions and a circular carbon economy with organic waste. A very interesting result would be the conversion of the carbon content of the low-value waste into high value solid carbon particles dispersed in the molten salt media with the simultaneous recovery of the hydrogen content under the form of a low carbon hydrogen rich fuel gas. In this context we started a study of the thermochemical conversion of polyolefinic plastic wastes in ZnCl2 based molten salts to test the possibility of: i) preparing in a one pot process a C-nanoparticles loaded molten salt-based micro-/nano-nanofluid that can be used in CSP plants equipped with direct absorption solar collectors; ii) quantify the impact of coupling nanofluid-based CSP with chemical processes; and iii) assess the potentiality of the process to achieve sustainable valorization of organic waste materials to be disposed of.File | Dimensione | Formato | |
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