Size measurement of dry ice particles produced from liquid carbon dioxide

► Dry ice particles were produced by rapid expansion of liquid carbon dioxide. ► Their size distribution was measured by a laser diffraction method. ► The primary particles ejected from the nozzle were about 1 μm in particle diameter. ► They grew initially in the jet flow and then became smaller due to sublimation. ► Agglomerates of about 100 μm were produced in a thermally insulated tube.