@article{esteves_smarzaro_caytuero_oliveira_passos_2019,  title={CATALYST PREPARATION METHODS TO REDUCE CONTAMINANTS IN A HIGH-YIELD PURIFICATION PROCESS OF MULTIWALLED CARBON NANOTUBES},  volume={36},  ISSN={0104-6632},  url={https://doi.org/10.1590/0104-6632.20190364s20190251},  DOI={10.1590/0104-6632.20190364s20190251},  number={4},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Esteves, Laura M. and Smarzaro, Juliana L. and Caytuero, Alexander and Oliveira, Hugo A. and Passos, Fabio B.},  year={2019},  month={Oct},  pages={1587–1600} }