Researchers develop membrane to clean biomass fuels

Researchers in Japan have developed a new membrane designed to remove nitrogen-containing chemicals from liquid biomass fuel mixtures. This technology aims to make the production of cleaner fuels from renewable organic materials, such as plants and agricultural waste, more efficient and less energy-intensive.

Biomass-derived oils often contain high concentrations of ring-shaped nitrogen compounds, which can lead to harmful nitrogen oxide emissions during combustion and damage catalysts during the refining process. Currently, producers rely on hydrodenitrogenation, a process requiring high temperatures, high pressure, and significant amounts of hydrogen. The new membrane, developed by a team led by Yuichiro Hirota of the Nagoya Institute of Technology in collaboration with the National Institute of Advanced Industrial Science and Technology and Kansai University, uses an ionic liquid within a stable molecular framework to remove these compounds early in the process, potentially lowering costs and refining requirements.