International Science Community Association Research Journal of Chemical Sciences 2231-606X 11 3 2021 10 18 Iron oxide based catalysts: a temperature programmed reduction study 39 45 EN . Anupama 1 Dept. in Chemistry, Govt. Girls College, Jhunjhunu, Rajasthan, India Kumawat Pooja 2 Dept. in Chemistry, Govt. PG College Jhunjhunu, Rajasthan, India Sharma Kanika 1 Department of Chemistry, University of Rajasthan, Jaipur-302004, India Saxena Sanjiv 2 Department of Chemistry, University of Rajasthan, Jaipur-302004, India Jain Asha 3 Department of Chemistry, University of Rajasthan, Jaipur-302004, India NTALANI Hermeline 1 Plant and Life Chemistry Unit, Faculty of Sciences and Technics, University Marien NGOUABI, BP 69, Brazzaville, Congo and Institute for Research in Exact and Natural Sciences, BP 2400, Brazzaville, Congo NGOUANOU Ravelle Duclérine 2 Plant and Life Chemistry Unit, Faculty of Sciences and Technics, University Marien NGOUABI, BP 69, Brazzaville, Congo MAKOMO Hubert 3 Plant and Life Chemistry Unit, Faculty of Sciences and Technics, University Marien NGOUABI, BP 69, Brazzaville, Congo LOUMOUAMOU Aubin Nestor 4 Multidisciplinary Research Team in Food and Nutrition, Faculty of Sci. and Technics, University Marien NGOUABI, BP 69, Brazzaville, Congo and Institute for Research in Exact and Natural Sciences, BP 2400, Brazzaville, Congo MOULOUNGUI Zéphirin 5 Dina – BioRes# - Chem www.dinabiores.com 10 rue Simone Henry 31200 Toulouse, France OUAMBA Jean-Maurille 6 Plant and Life Chemistry Unit, Faculty of Sciences and Technics, University Marien NGOUABI, BP 69, Brazzaville, Congo J.P. Alimi 1 Nigerian Stored Products Research Institute, P.M.B. 5044, Onireke, Oyo State, Nigeria S.A. Ahemen 2 Akperan Orshi Polytechnic, Yandev, P.M.B. 181, Gboko, Benue State, Nigeria A.I. Ikeme 3 Food Science and Technology Department, P.M.B. 01129, University of Nigeria, Nsukka, Nigeria P.O. Iluebbey 4 International Institute of Tropical Agriculture, P.M.B. 5320. Ibadan, Oyo State, Nigeria Alimi 5 Microbiology Department, P.M.B. 1, University of Ibadan, Oyo State, Nigeria J.O. 6 Mitra Sanchita 1 Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, Haryana India and Department of Chemistry, Gargi, College New Delhi, India . Yuktika 2 Department of Chemistry, Gargi College New Delhi, India Chapadgaonkar Shilpa S. 3 Department of Biotechnology, Manav Rachna International Institute of Research and Studies, Faridabad, Haryana India Kumar Ajay 1 Analytical Sciences, T&I, SABIC Research & Technology Pvt. Ltd, Plot No. 81 to 85, Chikkadunnasandra, Sarjapura - Attibele State Highway, Bengaluru, Karnataka-562125, India Malvi Bharmana 2 Olefins Platform, SABIC Research & Technology Pvt. Ltd, Plot No. 81 to 85, Chikkadunnasandra, Sarjapura - Attibele State Highway, Bengaluru, Karnataka-562125, India > Research Paper 2021 6 18 2021 10 18 Reduction process of iron oxides using hydrogen is a complex phenomena which needs to be understood properly to know about role of various phases of iron oxide in the functioning of catalyst. A detailed Temperature Programmed Reduction (TPR) study of iron oxide based catalyst has been reported here. Apart from fundamental behavior in terms of phase transformation as a result of reduction, the effect of various parameters like preparation methods, use of iron precursors, promoters and additives have also been studied in the present study. The reduction was found to be a multistage and stepwise process depending strongly on various factors like catalyst preparation method, iron precursor and presence of additives. This H2-TPR study further showed that, when Fe was more than 45%, reduction happened to be a three stage process (hematite Fe2O3 → magnetite Fe3O4 → wustite FeO →Fe), however when Fe is less than 30% it reduces through a two stage process (Fe2O3 → Fe3O4 → Fe). Also it was found that interaction of alumina (10%) with iron can make it possible to have reduction route through metastable FeO. However, with increasing Al content, alumina interacted strongly with iron oxide and resulted in the formation of spinel phase which was not easy to reduce. The presence of K and Mg in the catalyst shifted reduction towards high temperature. Copyright@ International Science Community Association