Abstract
AbstractA novel solar chemical reactor has been designed and tested for kinetic experiments with μm‐sized metal oxide particles. The solar reactor is essentially a tubular reactor with a continuous feed of particles suspended in a carrier gas. The suspension is electrically preheated in the back part of the solar reactor. Chemical conversion occurs in the high‐temperature zone in the front part of the solar reactor where concentrated solar radiation enters the reactor through a quartz window. Under typical operating conditions, the particle residence time in the high‐temperature zone was estimated to be 50 ms. Reduction of manganese iron oxides showed that flux‐density distributions of 450 to 770 W·cm−2 produced maximum particle temperatures of 2,200 K. Chemical reactivity studies also revealed that quenching is insufficient for very reactive materials. Therefore, an alternative quench device has been tested at room temperature and is discussed here.
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