Blackened calcium‐based composite particles and their apparent kinetics features for solar thermochemical energy storage

Abstract

The calcium looping (CaL) thermochemical thermal energy storage is one of the best high-temperature heat storage schemes for 3th concentrating solar power (CSP) photothermal power. However, the application of this technology is greatly hindered by the low solar absorption capability and the poor cyclic stability of CaCO 3 /CaObased material. In this article, the solar absorbing capability of CaCO 3 particles is enhanced by doping Mn-Fe oxides, meanwhile, awns of setaria faberis (ASF) and microcrystalline cellulose (MCC) are used as bio-templates to generate pores inside the particles. The pore-making process promotes the cyclic stability and carbonation kinetic features of the composite particles simultaneously. The test results show that the proposed particles possess adequate anti-crushing strength, high cyclic stability, high solar absorption, and high carbonation rate. In addition, the apparent carbonation kinetic features of the composite porous particles are studied with the influencing factors such as CO 2 partial pressure, reaction temperature, and particle morphology taken into consideration. A kinetic equation involving these parameters is developed with the thermogravimetry data of the prepared samples. By employing this kinetic function, the carbonation reaction of the prepared particles inside the carbonator becomes predictable, which is of great significance for the design and regulation of the carbonator achieving highly stable thermal output from the CaL thermochemical heat storage system.

Anisotropic electro‐driven phase change materials inspired by biological structure

“…Thermal energy is the most abundant energy source and forms the backbone of industrial applications, accounting for 60%-70% of energy consumption in many countries. 1 In the chemical production process, the generation and consumption of heat energy are not synchronized, resulting in a large amount of energy consumption and environmental damage. Effective thermal energy management can unify energy distribution in combination with production processes to optimize production and optimize energy consumption.…”

“…Thermal energy is the most abundant energy source and forms the backbone of industrial applications, accounting for 60%–70% of energy consumption in many countries 1 . In the chemical production process, the generation and consumption of heat energy are not synchronized, resulting in a large amount of energy consumption and environmental damage.…”

Long-stable solar energy capture and storage via negative thermal expansion regulated calcium-based particles

“…19 Teng et al improved the spectral absorption by doping with multiple inert carriers (Fe–Mn), and the energy storage density was 1057 kJ kg −1 after 15 cycles. 20 Sun et al also used binary inert carrier doping to modify dolomite, making its spectral absorption rate reach 73.22% and energy density 770 kJ kg −1 after 30 cycles. 21 Our previous work also screened and proved these inert carriers.…”