Diesel production from lignocellulosic feed: the bioCRACK process.

K Treusch,N Schwaiger,P Pucher,M Siebenhofer,J Ritzberger

doi:10.1098/rsos.171122

Abstract

The bioCRACK process is a promising technology for the production of second generation biofuels. During this process, biomass is pyrolized in vacuum gas oil and converted into gaseous, liquid and solid products. In cooperation with the Graz University of Technology, the liquid phase pyrolysis process was investigated by BDI – BioEnergy International AG at an industrial pilot plant, fully integrated in the OMV refinery in Vienna/Schwechat. The influence of various biogenous feedstocks and the influence of the temperature on the product distribution in the temperature range of 350°C to 390°C was studied. It was shown that the temperature has a major impact on the product formation. With rising temperature, the fraction of liquid products, namely liquid CHO-products, reaction water and hydrocarbons, increases and the fraction of biochar decreases. At 390°C, 39.8 wt% of biogenous carbon was transferred into a crude hydrocarbon fractions. The type of lignocellulosic feedstock has a minor impact on the process. The biomass liquefaction concept of the bioCRACK process was in pilot scale compatible with oil refinery processes.

Highlights

According to the adoption of the Paris Agreement in 2015 the global average temperature increase is to be kept significantly below 2°C above the preindustrial level
The water formed during Liquid phase pyrolysis (LPP) and the feed moisture are discharged with the pyrolysis oil
Up to 40 wt% of the biogenous carbon yielded in hydrocarbon refinery intermediates and fuel fractions

Summary

Introduction

According to the adoption of the Paris Agreement in 2015 the global average temperature increase is to be kept significantly below 2°C above the preindustrial level. This target has to be achieved by reducing greenhouse gas emissions without threatening food production [1]. Main lignocelluloseconversion technologies are: indirect liquefaction via gasification and methanol synthesis or Fischer–Tropsch synthesis; pyrolysisbased direct liquefaction with subsequent hydrodeoxygenation; upgrading of residues from solvent-based pulping processes and biotechnological treatment of biomass [2].

Methods

Results

Conclusion