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Sunday, 22 September 2019
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Raw materials & technologies, Technologies

Pure industrial chemicals by gasifying lignocellulosic biomass

Friday, 26 June 2015

The aim of a research project is to enable the use of wood-based chemicals to replace crude oil in, for example, plastics, fuels, and paints.

VTT's Bioruukki piloting centre in Espoo, Finland. Source: VTT

VTT's Bioruukki piloting centre in Espoo, Finland. Source: VTT

Demand has grown rapidly for chemicals generated from renewable sources, creating a need for alternative, environmentally friendly production routes.

Fischer-Tropsch synthesis

Particularly sought-after chemicals include pure aromatics, such as the BTX chemicals benzene, toluene and xylene. VTT Technical Research Centre of Finland Ltd has developed a method of manufacturing BTX chemicals by combining the gasification of lignocellulosic biomass, the Fischer-Tropsch synthesis and aromatisation. Over 85% of the separated benzene exceeded 90% purity and around 50% of the separated toluene was over 70% purity. The process can be applied to the production of bio-based chemicals. However, both benzene and toluene can also be used in the manufacture of more sophisticated compounds. Since the compound's synthetic route requires pure source materials, the research proves the high quality of aromatics produced through gasification.

Demonstrating industrial viability

The researchers have calculated that the estimated price of pure BTX fractions is EUR 1.40 per litre. This price is higher than the current price of raw material derived from crude oil, but significantly more competitive than the price of other bio-based routes. The researchers are continuing larger-scale development work in their Bioruukki piloting centre in Espoo, Finland. The aim is to demonstrate the industrial viability of the entire process – from biomass to aromatics to end products – by producing several kilos of material. The researchers will further develop the synthetic route in order to improve the technical and economic feasibility of the process as a step towards commercial viability.

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