TEMPERATURE-PROGRAMMED CHARACTERIZATION OF SPENT SYNGAS CATALYST (NiO/CaO)

• Main Author: Nik Khamsani, Nik Zarina Suryana
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2005
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/8116/1/2005%20-%20TEMPERATURE-PROGRAMMED%20CHARACTERIZATION%20OF%20SPENT%20SYNGAS%20CATALYST%20%28NiOCaO%29.pdf; http://utpedia.utp.edu.my/8116/

This research project is conducted to characterize the fresh and spent catalyst of NiO/CaO using temperature programmed. The characterization techniques used are Temperature Programmed Reduction (TPR) and Temperature Programmed Oxidation (TPO). Characterization of catalyst is important in order to determine the catalyst properties. The author has analyzed several methods used such as TPR, TPO, FTIR and CHNS,which had led to significant findings in this area of study. TPR analysis is used to determine the temperature at which reduction take place in the species. From this, it can also be observed the amount of hydrogen consumption and determine the other contaminant species reduced especially for spent catalyst. For the fresh catalyst, the nickel species are reduced at 410°Cand 680°C, while for the spent catalyst, it is reduced at 400 °C and 640 °C. There are two NiO particles size distribution exists which are lower reduction temperature particles range for smaller size and higher reduction temperature range for bigger size. TPO analysis is used to determine the temperature at which oxidation take place in the catalysts. From both two analysis, TPR and TPO, it is necessary to determine the regeneration method, which can improve the catalyst performance similar to fresh catalyst. CHNS is used in order to determine the amount of carbon and hydrogen contained in the catalyst. This project concluded that high carbonate content in the spent catalyst. FTIR is one of the methods to identify the functional group present in the catalyst. From FTIR plot, it is observed that carbonate and -OH present in the spent catalyst, meanwhile only -OH present in the fresh catalyst.