Personnel:

Ioannis Valsamakis, Ph.D. Student

Education:
2002 B.S. Chemical Engineering, University of Cagliari, Italy
2004 M.S. Chemical Engineering, University of Cagliari, Italy

Research Interests:
Fuel Processing; Advanced Desulfurization Sorbents; High Temperature Water Gas Shift, Fuel Cells

Activities:
Synthesis of novel sorbents with high sulfur capacity and H2S removal efficiency for high temperature desulfurization of fuel gas streams, and application of high surface area lanthanide oxysulfides as sulfur tolerant high temperature water gas shift catalysts.

Publications:

1. I. Valsamakis, R. Si, M. Flytzani-Stephanopoulos, Stability of lanthanum oxide-based H₂S sorbents in realistic fuel processor/fuel cell operation, Journal of Power Sources 195 (2010) 2815.
2. I. Valsamakis, M. Flytzani-Stephanopoulos, Sulfur-tolerant Lanthanide Oxysulfide Catalysts for the High-Temperature Water-Gas Shift Reaction, Applied Catalysis B – Environmental, Submitted.

Presentations/Posters:

1. High Temperature H2S Removal from Fuel Gas Streams by Lanthanide Oxides, Ioannis Valsamakis, Zheng Wang, Rui Si, Mann Sakbodin, Maria Flytzani-Stephanopoulos, Oral presentation at the AIChE annual meeting, Salt Lake City (UT), November 2007.
2. Rare Earth Sulfides as High-Temperature Regenerable Sulfur Sorbents, Ioannis Valsamakis, Rui Si, Maria Flytzani-Stephanopoulos, Oral presentation at the 21st NAM meeting San Francisco (CA), June 2009.
3. Rare Earth Sulfides as High-Temperature Regenerable Sulfur Adsorbents and Catalysts for the Water-Gas Shift Reaction, Ioannis Valsamakis, Rui Si, Maria Flytzani-Stephanopoulos, Oral presentation at the AIChE annual meeting, Nashville (TN), November 2009.
4. Rare Earth Oxysulfides as catalysts for high temperature water gas shift (HT-WGS) reactions, Ioannis Valsamakis, Maria Flytzani-Stephanopoulos, Poster presentation at the ACS meeting, Boston (MA), August 2010.
5. Rare Earth Oxysulfides (RE2O2S): Novel Sulfur Tolerant Catalysts for the High-Temperature Water-Gas Shift Reaction, Ioannis Valsamakis, Maria Flytzani-Stephanopoulos, Oral presentation at the AIChE annual meeting, Salt Lake City (UT), November 2010.