ŽILKA Miroslav Czech Technical University in Prague, Faculty of Mechanical Engineering

Spoluautoři STIEBEROVÁ Barbora, TICHÁ Marie, HOŠEK Jan, FREIBERG František

This article presents main results of a comparative study of different nanoparticle (NP) production technologies, e.g. flame pyrolysis, plasma synthesis, combustion synthesis, sol-gel, solvothermal and hydrothermal synthesis have been considered. Evaluation criteria were primarily focused on environmental impacts of compared technologies but also general criteria as productivity, quality, technical conditions or economic criteria have been envisaged. Available LCA studies assessing particular NP production technologies were used as an important source for this comparison. The study has been elaborated within 7. RP Sustainable Hydrothermal Manufacturing of Nanomaterials (SHYMAN), which aims to develop competitive and sustainable continuous NP production technology based on supercritical hydrothermal synthesis. The study will serve for the assessment of this newly developed and scaled up technology. Except general evaluation of different technologies on the basis of particular criteria presented in the table form, the article shows in detail, for the functional unit of 1 kg of produced NPs, the comparison of energy consumption, CO2 emissions, unwanted emissions of nanoparticles and common pollutants. The evaluation has demonstrated that besides specific processes of different technologies it is the choice of precursor which has essential influence on energy demand of the whole life cycle of NPs; the CED (Cumulative energy demand) incorporated in the precursor could be higher than the process energy of selected technology.