TPR-MS Insitu analysis for optimum CNT of Fe & Ni/Carbon system Ali Rinaldi, Norly Abd, Imran Syakir
Introduction & Background • The complication of metal-carbon support interaction further complicates the study of growing CNTs on Activated carbon. • The complication involves gasification and carbon contamination that changes the catalyst activity towards CNTs growth. • In addition to the already-complicated CNTs growth mechanistic study, a better experimental and reactor design is required to acquire some knowledge on the system.
objectives • Simplicity in preparing and loading the samples. • Quasi- insitu method in analyzing the effect of temperature, gas composition, time to quality of CNTs • The TPR set up allows air-tight system • The MS detector permits high precision gas reactants and products analysis. • Compatibility with carbon groups experiment with HPDSC in Berlin.
MS/Vent H2 C2H4 N2/Ar Pre-treatment oven Reactor setup Pulse set up Calc/red gases
Gas out Gas in Advantages • Practical sample preparation • Require only small amount of sample • Free from gas diffusion problem • Allow continuous monitoring of feedstock gasses and products with MS and/or TCD detectors. • Gas is heated before contacting the sample • Allow weight measurement after reaction.
Aims • To correlate Surface functional groups (SOFG) decomposition of Act carbon with activity of the catalyst for CNTs synthesis. • With a SOFG-free support (eg graphite) study the effect of pulsed CO/CO2 towards the activity of catalyst for CNTs synthesis.
Aims • Fast study of calcination and/or reduction conditions effect towards the catalyst activity for CNTs synthesis. • Understand the effect of metal catalyst oxidation state to the CNTs synthesis (for multivalent metals; Fen+) • Measure the adsorption energy of H2, C2H4 for catalyst calcine and reduced at different conditions.
Work plan? • In progress