Decomposition of limestone in a solar reactor |
| |
Authors: | A Imhof |
| |
Abstract: | The thermal decomposition of limestone has been selected as a model reaction for developing and testing an atmospheric open solar reactor. The reactor consists of a cyclone gas/particle separator which has been modified to let the concentrated solar energy enter through a windowless aperture. The reacting particles are directly exposed to the solar irradiation. Experimentation with a 60 kW reactor prototype was conducted at PSI's 90m2 parabolic solar concentrator, in a continuous mode of operation. A counter-current flow heat exchanger was employed to preheat the reactants. Eighty five percent degree of calcination was obtained for cement raw material and 15% of the solar input was converted into chemical energy (enthalpy).The technical feasibility of the solar thermal decomposition of limestone was experimentally demonstrated. The use of solar energy as a source for high-temperature process heat offers the potential of reducing significantly the CO2 emissions from lime producing plants. Such a solar thermochemical process can find application in sunny rural areas for avoiding deforestation. |
| |
Keywords: | High-Temperature Solar Technology Cement Lime Limestone CO2-Mitigation Feasibility Wood Energy Deforestation Calcination Reactor Cyclone Concentrator |
本文献已被 ScienceDirect 等数据库收录! |