Issue 48/2015 - Progress in CO2 removal at room temperature

Tang Zhicheng's research group at the Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, has designed a series of catalysts and successfully applied them to the elimination
of CO at room temperature.

The research group first prepared mesoporous and microporous cerium dioxide and transition metal-doped mesoporous cerium dioxide-based composite metal oxides by hard template method, and realized the pore orientation design
of mesoporous metal oxides by controlling the synthesis conditions of the template.
The results show that the performance of the prepared catalyst is not only related to the specific surface area, grain size and pore structure of the catalyst, but also related
to the reactive oxygen species on the surface of the catalyst.

They also used three-dimensional mesoporous KIT-6 zeolite as a template, prepared a series of mesoporous carbon materials by nanocasting technology, and prepared a series of noble metal catalysts
by deposition precipitation method as a carrier.
The results show that the roasting temperature of the catalyst is related to the dispersion of precious metals on the surface of the catalyst and the presence of oxides, and the complete elimination of CO at room temperature can be achieved at a low precious metal content, and it can be operated for a long time without deactivation
.

CO catalytic oxidation applications at room temperature are wide, such as fuel cells, underground mine rescue cabins, fire self-rescue respirators, gas purification in carbon dioxide lasers, and the elimination of trace amounts of CO in motor vehicle exhaust
.
However, catalytic elimination of CO at room temperature under low precious metal content is one of
the problems in the field of catalysis research in the world today.
(New)