Lenfest Faculty, Staff & Researchers

Ah-Hyung (Alissa) Park, Lenfest Chair in Applied Climate Science

Interim Director



Professor Park is the Lenfest Chair in Applied Climate Science at Columbia University and is also the Interim Director of the Lenfest Center for Sustainable Energy, where she researches issues in energy, environmental engineering and particle technology. Some of Park’s areas of research interest are carbon capture, utilization, and storage (CCUS); sustainable energy conversion systems; synthesis of hydrogen and liquid fuels from alternative energy sources; particle technology; electrostatic charging penomena in multiphase flows; and electrostatic tomography.

Park has received numerous honors and distinctions throughout her career as a researcher.  Recently she has been appointed as a member of the International Committee at the American Institute of Chemical Engineers, where she has also been elected as the Vice-Chair (2009-2011) and Chair (2011-2013) of the Fluidization and Fluid-Particle Systems Group and Treasurer (2010-present) of the Particle Technology Forum.  She has also recently received the James Lee Young Investigator Award, the NSF Career Award, and a nomination for the Packard Fellowship.  In 2011, she was the distinguished speaker at the Womensphere Emerging Leaders Global Summit.  A more complete list of her many accomplishments can be found on her website.

A graduate of the University of British Columbia, Professor Park received a Bachelor of Applied Science with distinction and a Masters of Applied Science, both in Chemical and Biological Engineering. She received a PhD degree in Chemical and Biomolecular Engineering from the Ohio State University.

Monique Reeser

Program Coordinator


Monique helps to manage the Lenfest Center’s overall operations and oversee its programs and outreach activities. Previously, she worked as a program coordinator at both Binghamton University and Cornell Cooperative Extension. During that time she designed and facilitated deliberative dialogue models to increase student engagement in environmental policy discussions, and supported the implementation of the New York State Energy Research and Development Authority’s (NYSERDA) residential energy efficiency program, Green Jobs Green New York. She has an M.P.A. in environmental policy, and a B.A. in environmental public policy administration and law from Binghamton University.

Research Scientists


Christoph Meinrenken

Associate Research Scientist


Christoph Meinrenken is an adjunct assistant professor in the Department of Earth and Environmental Engineering and associate research scientist at the Earth Institute/Lenfest Center for Sustainable Energy. His research focusses on computer modeling to elucidate and improve the technological and economic performance of low carbon energy systems. Recent projects include automated product carbon footprinting (PepsiCo), electricity arbitrage in smart buildings (NIST), electrification of the transportation sector, and synthetic fuels (ABB).
Before joining Columbia, Meinrenken worked on modeling molecular spectra (MSE, Princeton University, 1996) and computational neuroscience (PhD Physics, Max Planck Institute, 2001). In addition to academic research and teaching, Meinrenken spent several years in the private sector, specializing in financial engineering and risk management.

Visiting Fellows

Grégoire Léonard (gl2497@columbia.edu) is a post doctoral fellow at the Lenfest Center for Sustainable Energy. He received a Master Degree in Chemical Engineering at the University of Liège and a Master Degree in Mechanical Engineering at the Technical University of Munich. He completed his PhD at the University of Liège in the field of post-combustion CO2 capture using amines, with a strong interest in both modeling and experimental approaches. His current research interested are the optimization of an integrated process combining CO2 capture, water electrolysis and methanol synthesis for the production of CO2-neutral liquid fuels. Grégoire is an Honorary Fellow of the Belgian American Educational Fund, and his research is supported by a Rotary Scholarship and an Excellence Scholarship of the Wallonie-Bruxelles International Agency. Grégoire is Assistant Lecturer at the University of Liège in charge of lectures related to conception, simulation and optimization of chemical processes.

Emad Andarawis is a Senior Engineer with the Electronics Miniaturization Lab of GE Global Research. His current research interests are in the area of harsh environment sensors and sensor electronics for self-calibrating, ultra-low-power and high-temperature sensor subsystems, and energy harvesting sensor systems. Emad is researching scales and systems with Klaus Lackner focusing on energy production and smart grid applications.  Emad is a graduate of Columbia University (B.S. 1997, M.S. 1998) and currently holds 29 US patents.

Raghubir Gupta (gupta@rti.org) is the Senior Research Director at Research Triangle Institute’s (RTI) Center for Energy Technology.  He has 22 years of experience in coal gasification, gas cleanup, fluidization, reactor design, process engineering, and contaminant removal. Currently the senior research director, Center for Energy Technology (CET), Dr. Gupta is responsible for technical, financial, and administrative management of all Center activities. Principal areas of expertise for CET include hydrogen production, delivery, and storage; syngas cleaning; membrane separation; heterogeneous catalysis; and greenhouse gas control. Dr. Gupta also manages numerous projects in the area of catalysis and reaction engineering, including innovative approaches to the removal of sulfur from hydrocarbon fuels and syngas, as well as CO2 sequestration.  He is currently an Adjunct Visiting Research Scientist at LCSE and is working with Klaus Lackner on a project examining the feasibility of a small footprint reactor that can convert shale gas into liquid fuel.

Bob van der Zwaan (vanderzwaan@ecn.nl) is senior scientist at the Policy Studies department of the Energy research Centre of the Netherlands (ECN) in Amsterdam and at Columbia University’s Lenfest Center for Sustainable Energy (Earth Institute) in New York, and is adjunct professor at Johns Hopkins University’s School of Advanced International Studies (SAIS) in Bologna. He is co-director of the International Energy Workshop (IEW), member of the Council of the Pugwash Conferences on Science and World Affairs, and lead author for Working Group III of the Intergovernmental Panel on Climate Change (IPCC, 4th and 5th Assessment Reports). He held several visiting professorships, most recently at the Royal Institute of Technology (KTH, Stockholm, 2010) and the Kiel Institute for the World Economy (IFW, 2008), and held research positions at Harvard University (Cambridge, 2002-2005), the Vrije Universiteit Amsterdam (1999-2001), Stanford University (Paolo Alto, 1999-2000), the Institut Français des Relations Internationales (IFRI, Paris, 1997-1999) and the European Organization for Nuclear Research (CERN, Geneva, 1992-1995). He was trained in economics (MPhil, 1995-1997, University of Cambridge, King’s College), physics (PhD, 1991-1995, NIKHEF, University of Nijmegen; MSc, 1987-1991, University of Utrecht) and international relations (Certificate, 1993-1994, IUHEI, University of Geneva). His research interest includes the fields of energy resources and climate change, environmental economics and technological innovation. He is (co-)author of over 100 peer-reviewed scientific articles, and contributor to, or editor of, a dozen books or book chapters.