Within the LignoSys project the performance of three small scale (~10 MWth) thermochemical conversion routes for lignocellulosic feedstock to biomethane have been investigated.
The three thermochemical options are:
- Indirect gasification through the Heatpipe Reformer (HPR)
- PyroCatalytic Hydrogenation (PCH)
- Indirect gasification through the WoodRoll® process
The LignoSys final report has been published as Renewtec Report 008:2018.
The most striking result is that small scale bioSNG technology based on allothermal gasification is able to compete with large scale bioSNG technology based on pressurised, oxygen-blown gasification not only in terms of GHG emissions, primary energy need and conversion efficiency but also in terms of bioSNG production cost!
On the 17th of December the Swedish Energy Agency granted Renewtec public funding to conduct the LignoSys project – System study of small scale thermochemical conversion of lignocellulose rich feedstock to biomethane.
The project is part of the research programme “Biodrivmedelprogrammet – Termokemiska processer”.
Project partners are:
Cortus Energy AB
Dansk Gasteknisk Center a/s
European Biogas Association
G4 Insights Inc.
Institute for Biogas, Waste Management & Energy
OX2 Bio AB
SYSAV Utveckling AB
Project budget: 2 415 000 SEK
Project period: 1 January 2016 – 31 December 2017
The aim of the project is to build up knowledge and competence on efficient thermochemical conversion of lignocellulose to biomethane in the 5-10 MWth size through system studies. The project covers the steps from resource extraction to final product, i.e. ”well-to-gate”. Three different thermochemical processes will be treated from an energy, resource, cost and greenhouse gas perspective.
For non-woody lignocellulose rich feedstock, such as straw and the soft part of sorted park and garden waste, the thermochemical conversion routes will be compared to the biochemical conversion route (anaerobic digestion) in combination with pre-treatment and upgrading of the raw biogas to biomethane of vehicle fuel quality.