Photocatalytic reduction of CO2 using Ti-MCM-41 photocatalysts in monoethanolamine solution for methane production
Journal
Industrial and Engineering Chemistry Research
Journal Volume
53
Journal Issue
28
Pages
11221-11227
Date Issued
2014
Author(s)
Abstract
Photocatalytic reduction of carbon dioxide (CO2) to form a valuable energy source of methane (CH4) in monoethanolamine (MEA) solution is first investigated by mesoporous photocatalysts of Ti–MCM-41 in this study. The MEA solution was chosen as the absorbent and reductant because amine absorption is one of the most popular methods for CO2 capture from flue gas streams. Also, it is intended to integrate the CO2 capture and utilization into one process. The photocatalytic results of methane yields indicated that MEA served as a better reductant than water and NaOH which have been commonly used for CO2 reduction. For the best photocatalyst of Ti–MCM-41(50) manufactured at a Si/Ti molar ratio of 50, its methane yield (62.42 μmol/g of cat.) was much higher than that of commercial P25 photocatalyst after 8 h of UV illumination. A photoreduction quantum efficiency (PQE) of 9.18% was achieved.
SDGs
Type
journal article