thesis, Characterization, and Catalytic Activity Ru/La-Al 2 O 3 for Ammonia Dehydrogenation Dan Bi Chung Advisor: Prof. Kwan-Young Lee Dr. Chang Won Yoon Fuel cell Research Center, Korea Institute of Science and Technology, Chemical and Biological Engineering, Korea University, 2014.12.02 석석 석석 석석
1. Synthesis, Characterization, and Catalytic Activity of
Ru/La-Al2O3 for Ammonia Dehydrogenation Dan Bi Chung Advisor: Prof.
Kwan-Young Lee Dr. Chang Won Yoon Fuel cell Research Center, Korea
Institute of Science and Technology, Chemical and Biological
Engineering, Korea University, 2014.12.02
2. INDEX Introduction Research background Literature precedents
Motivation Experimental Catalyst preparation Characterization
Results and discussions Catalytic dehydrogenation of ammonia over
the Ru(1wt%)/La(x)-Al2O3 Structured catalysts for industrial
application Conclusions
3. 1 Introduction
4. Exhaust of fossil fuel and global warming Need for
sustainable energy source Solar, Wind, Biomass, Hydrogen Picture
from movie The earth Picture from World Nature Organization4
5. Methane Wind Solar Electrolysis Reformer Water Oxygen
Hydrogen Storage Hydrogen Fuel cell Hydrogen economy Hydrogen
economy 5 Renewables energy
6. 6 Hydrogen storage
7. High hydrogen density (17.8wt%) Carbon-free chemical energy
Developed technology for synthesis (Haber-Bosch process) Catalytic
decomposition Solid ammine complexes Advantages 7 Life cycle of
hydrogen stored as ammonia Dehydrogenation It is necessary to
develop the catalyst for ammonia dehydrogenation A. Zttel et al.,
Soc, A 368 (2010) 3329-3342
8. Literature Precedents: Controlling Factors 8 (1) Influence
of Metals: Ru Ru > Rh > Ni > Pd Pt > Fe Rh Ni Pd, Pt
S.F. Yin et al., Appl. Catal. A 277 (2004) 1-9 S.F. Yin et al.,
Appl. Catal. 244 (2004) 384-396
9. Literature Precedents: Controlling Factors 9 (2) Influence
of Supports: Ru CNTs MgO TiO2, AC ZrO2 Al2O3 ZrO2 S.F. Yin et al.,
Appl. Catal. 244 (2004) 384-396
10. Literature Precedents: Controlling Factors 10 (3) Influence
of Promoters: Ru/CNTs S.F. Yin et al., Appl. Catal. A 277 (2004)
1-9
11. Motivation 11 Metal : Ru highly activity for ammonia
decomposition Support : Al2O3 less-expensive Promoter : La Sustain
high metal dispersity using thermally stable supports Ru supported
on La doped Al2O3 Al2O3 surface LaAlO3LaAlO3 Ru particles
29. Conclusions - Ru(1 wt%)/La(x)-Al2O3 (x=0, 1, 5, 10, and 30
mol%) were prepared for the dehydrogenation from ammonia. - Among
the as-prepared catalysts, the Ru/La(10)- Al2O3 material proved to
be superior. - The La addition with optimized quantities appears to
be critical for enhancing the catalytic activity. - The enhanced
activity of the catalyst was proposed to originate from the SMSI
between RuOx and La(10)- Al2O3, which further resulted in improved
catalyst stability. - The as-applied doping strategy would offer
valuable insight into the development of highly efficient,
transition-metal-based catalysts for ammonia dehydrogenation.
29
30. Thank you for your attention
31. Experiment 31 Preparation catalyst Al2O3 with (La 1, 5, 10,
30 mol% doped Al2O3) Precursor Lanthanum nitrate Solvent Distilled
H2O Impregnation -Al2O3 Dry At 100 oC for 12hr Stirring At 80 oC
for 3hr Calcination At 900 oC for 5hr Ru (1wt%)/La(x)-Al2O3 (x=0,
1, 5, 10, and 30 mol%) Precursor Ruthenium chloride Solvent
Distilled H2O Impregnation La(x)-Al2O3 Dry At 100 oC for 12hr
Rotary evaporation At 80 oC for 3hr Calcination At 800 oC for 5hr
H2 : N2 = 1:1 Mixing Mixing