For sustainable society


A uniquely designed “wall” eats air pollution

The Torre de Especialidades Hospital in Mexico City, the capital of Mexico, has a very quirky exterior wall. Is this eccentric design for relieving the stress of patients and visitors? Or for improving the cityscape? It is actually aiming for reducing greenhouse gases.

The wall is a module named “prosolve370e” that is constructed on exterior wall of a building, which has been developed by elegant embellishments in Germany. The modules are coated with a “titanium dioxide (TiO2)”, known as a catalyst to be activated by sunlight in the atmosphere and to clean the air, on their surface.

When the module is exposed to sunlight, the TiO2 decomposes pollutants such as Nitrogen Oxide (NOx) and Volatile Organic Compounds (VOC) in the air. Particularly, NOx is a harmful substance contained in motor vehicle emission, which causes not only respiratory diseases but also photochemical smocks and acid rain. For this reason, movements toward reduction, such as emission control, are conspicuously seen worldwide. Since there is a limited number of ways to decompose NOx, the module is also highly expected as a method for easily decomposing NOx.

The module has resulted in complex shapes as it’s designed to maximize surface area and capture light in all directions. It is designed for retrofit, and the convenience that multiple modules can be installed simply by attaching them to the exterior wall without specially designed is an important point.

There is heavy car traffic in great cities including Mexico City, and it has long been a challenge to reduce gas emissions. According to elegant embellishments, the module is reducing the pollution of 1,000 cars per day. Since the module can be installed anywhere, including parking areas and public facilities, it is expected to spread in the future.

Photo:elegant embellishments