The application of modified cenospheres in DeNOx processBogdan Samojeden, Teresa Grzybek, Agnieszka Szymaszek, Oliwia Ligęza, Wioletta Kowalczyk and Monika MotakE3S Web Conf., 108 (2019) 02019DOI: https://doi.org/10.1051/e3sconf/201910802019