Be Clean

What are those fine yellow tubules? A bundle of spaghetti? Bristles, maybe? What appears at first sight to be pasta or a paintbrush is in fact a membrane consisting of a large number of cylindrical polyimide hollow fibers from Evonik Industries. Such hollow-fiber membranes are used in special modules for processing crude biogas.

Biogas is produced by fermentation of biomass, an organic material of plant and animal products. In addition to the energy source, methane, raw biogas contains carbon dioxide and other trace gases. These contaminants are separated from the methane cost-effectively and energy-efficiently by a membrane-based process known as gas permeation. The biomethane thus produced is fed into the natural gas grid; what the consumer gets is a green, CO^₂-neutral gas.

Evonik's membranes have the highest selectivity and low plasticization. Evonik thus offers a particularly efficient technology for exploiting renewable energy from biogas plants.