(82a) Metal Oxide Based Solar-Driven Two-Step CH4 Reforming and H2o/CO2 Splitting Cycle
AIChE Spring Meeting and Global Congress on Process Safety
2018
2018 Spring Meeting and 14th Global Congress on Process Safety
Emerging Technologies in Clean Energy
Alternative Fuels including Biofuels, Hydrogen, Renewable Hydrogen, and Syngas II
Tuesday, April 24, 2018 - 10:15am to 10:40am
Recently, metal oxide (MO) based two-step CH4 reforming and H2O/CO2 splitting cycle receiving much attention for co-production of syngas and H2. In first step, the MO is reduced using CH4 as the reducing agent producing synags (combined H2 and CO). The reduced MO can be re-oxidized using H2O, CO2, or combined stream of H2O/CO2 for the production of H2, CO, or syngas. In this study, ceria is utilized as the redox material for co-production of syngas and H2 via solar-driven two-step CH4 reforming and H2O/CO2 splitting cycle. At first, the equilibrium thermodynamic analysis is performed to study the effect of CH4/ceria ratio on equilibrium compositions and the temperatures required to achieve higher levels of fuel production. Likewise, the solar reactor efficiency analysis is conducted to determine the solar-to-fuel energy conversion efficiency of this cycle. Ceria is further synthesized and characterized using various analytical techniques. The synthesized ceria is further tested towards CH4 reforming and H2O/CO2 splitting reaction using a thermogravimetric analyzer (coupled with GC-MS). Effects of CH4 concentration, reforming and splitting temperatures on the fuel production is also explored. The obtained results are compared with previous thermochemical cycles and will be presented in detail.
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