Our high-sulfur spent carbon reactivation technology, which is referred to as our CR3 process, has been recognised with a prestigious Lorenzo Cagnoni Award for Green Innovation.
Puragen were awarded the top prize in the Bioenergy & Agriculture category at last night’s awards ceremony, which took place as part of the Ecomondo environmental exhibition in Rimini, Italy.
Sustainable Reactivation
Puragen’s innovation means that biogas and biomethane producers no longer need to dispose of waste carbons that are heavily loaded with sulfur, which is a common problem in the sector due to high levels of hydrogen sulfide (H2S) in biogas streams, a contaminant that is removed by activated carbon filtration.
Until this technological break-through, these high-sulfur carbons were considered untreatable by the activated carbon sector, meaning that they couldn’t be recycled via normal thermal reactivation techniques. If treated in a standard thermal reactivation process, elemental sulfur would be desorbed from the spent carbon, coating the expensive kiln interior with elemental sulfur, and potentially combining with any moisture or oxygen present in the process to form sulfurous acid and SOx, respectively.
Puragen’s innovative technical solution is the first of its kind on the market, and solves the age-old problem of biogas and biomethane operators having to dispose of spent activated carbons, when the sulfur loading was previously considered too high.
Commenting on the award, Puragen’s European MD Steve Bell said,
