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SUMMARY:Design guidelines for practical solar fuel production
DTSTART:20150928T131500
DTEND:20150928T141500
DTSTAMP:20260415T122037Z
UID:ae5a5f0822d53db63943677469053d4e65dec78e6b1fcc1307c98cba
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Sophia Haussener\, EPFL\nSolar radiation is the most abu
 ndant energy source available but it is distributed and intermittent\, the
 reby necessitating its storage via conversion to a fuel (e.g. hydrogen or 
 carbohydrates) for practical use. Solar thermochemical and photoelectroche
 mical approaches provide viable routes for the direct synthesis of solar f
 uels. The former make use of (concentrated) solar radiation as the energy 
 source of process heat to drive endothermic chemical reactions\, while the
  latter use photon energy for charge generation to drive electrochemical r
 eactions. Both approaches involve complex interactions between multi-mode 
 heat transfer\, multiphase flow\, charge transfer\, and chemical reaction.
  For example for photoelectrochemical (PEC) devices\, its instantaneous ef
 ficiency is a complicated function of tradeoffs between light intensity an
 d the temperature-dependence of the photovoltage and photocurrent\, as wel
 l as the losses associated with factors that include: ohmic resistances\, 
 concentration overpotentials\, kinetic overpotentials\, and mass transport
 . Although much effort has been devoted to the development of suitable rob
 ust and scalable materials for PEC devices\, relatively little attention h
 as been paid to the PEC device engineering-design aspects. These are cruci
 al because the material combinations that provide optimal performance in s
 uch a system depend significantly on the device design itself and the oper
 ating conditions.\nIn this presentation\, I will discuss device engineerin
 g aspects of solar reactors for solar thermochemical and photoelectrochemi
 cal fuel generation. I will demonstrate how multi-physics computational mo
 delling frameworks of solar devices can substantially support the understa
 nding of coupled transport phenomena\, provide guidelines on design\, oper
 ation\, and optimization\, as well as guide the development and research o
 f components and materials used in PEC reactors.\nM. A. Modestino and S. H
 aussener. An Integrated Device View on Photoelectrochemical Solar-Hydrogen
  Generation\, in Annual Review of Chemical and Biomolecular Engineering\, 
 vol. 6\, p. 13–34\, 2015.\nS. Suter and S. Haussener. Morphology Enginee
 ring of Porous Media for Enhanced Solar Fuel and Power Production\, in Jom
 \, vol. 65\, num. 12\, p. 1702-1709\, 2013.\nS. Haussener\, C. Xiang\, J. 
 M. Spurgeon\, S. Ardo and N. S. Lewis et al. Modeling\, simulation\, and d
 esign criteria for photoelectrochemical water-splitting systems\, in Energ
 y Environ. Sci.\, vol. 5\, p. 9922 - 9935\, 2012.
LOCATION:MXF 1 https://plan.epfl.ch/?room==MXF%201
STATUS:CONFIRMED
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