Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
764000 | Energy Conversion and Management | 2014 | 8 Pages |
Abstract
Photocatalytic CO2 reduction seems potential to mitigate greenhouse gas emissions and produce renewable energy. A new model of photocatalytic CO2 reduction in optical fiber monolith reactor with multiple inverse lights was developed in this study to improve the conversion of CO2 to CH3OH. The new light distribution equation was derived, by which the light distribution was modeled and analyzed. The variations of CH3OH concentration with the fiber location and operation parameters were obtained by means of numerical simulation. The results show that the outlet CH3OH concentration is 31.1% higher than the previous model, which is attributed to the four fibers and inverse layout. With the increase of the distance between the fiber and the monolith center, the average CH3OH concentration increases. The average CH3OH concentration also rises as the light input and water vapor percentage increase, but declines with increasing the inlet velocity. The maximum conversion rate and quantum efficiency in the model are 0.235 μmol gâ1hâ1 and 0.0177% respectively, both higher than previous internally illuminated monolith reactor (0.16 μmol gâ1hâ1 and 0.012%). The optical fiber monolith reactor layout with multiple inverse lights is recommended in the design of photocatalytic reactor of CO2 reduction.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Energy (General)
Authors
Kai Yuan, Lijun Yang, Xiaoze Du, Yongping Yang,