AN IR AND FLOW REACTOR STUDY OF CHLOROFORM OXIDATION OVER MANGANESE OXIDES

GALLEGOS, MARÍA V; GABRIELLA GARBARINO; COLMAN LERNER ESTEBAN; ELISABETTA FINOCCHIO; GUIDO BUSCA; JORGE E. SAMBETH; M. PELUSO

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Lugar: Bahia Blanca; Año: 2021 vol. 51 p. 81 - 86

0327-0793

A series of manganese base oxides(MnCe, MnZr and MnCeZr) obtained by coprecipitation, were characterized by SBET, XRD,TPR, XPS and studied by FTIR in the oxidation reaction of a typical Cl-VOC such as chloroform,CHCl3. The oxides were compared with a manganese oxide obtained from the recycling of spent batteries (MnOx). In addition, the catalytic combustionof CHCl3 in a fixed-bed reactor was analyzed andthe CHCl3 conversion decreased in the order: MnZr> MnOx = MnCeZr >MnCe. In all cases, the conversion is higher than that obtained without a catalyst.The surface Mn4+/Mn3+ ratio would favor the decomposition of Cl-VOC. The study of CHCl3 reaction atmosphere by in situ IR reveals that in the absence of catalysts, CCl4, COCl2, C2Cl4 and CH2Cl2were observed. On the other hand, C2Cl4 is notformed in the presence of catalysts, although CCl4and CH2Cl2 were observed and must be avoided.