Title:
One-stage Bio-oil Stabilization over a Sulphided NiMo/Al2O3 Catalyst
Author(s):
Auersvald, M., Shumeiko, B., Straka, P., Šimáček, P., Staš, M., Kubička, D.
Document(s):
Paper
Poster
Abstract:
The upgrading of pyrolysis bio-oils is a crucial step before their further use as advanced biofuels. Hydrotreatment is the preferred upgrading process, but the tendency of bio-oils to form carbonaceous deposits and other negative properties cause catalyst deactivation and thus the gradual decrease in product quality. The catalyst deactivation often leads to the termination of experiments after several hours/days of a continuous hydrotreatment. All those problems were recorded even for two-stage bio-oil hydrotreatment that is usually suggested for bio-oil upgrading. We already reached a total time on stream (TOS) 81 h of bio-oil hydrotreatment when different conditions were tested. Now, we decided to maintain the most appropriate conditions (340 °C and 4 MPa) throughout a whole week over a sulphided NiMo/Al2O3 catalyst. We have succeeded in achieving 80 h TOS under the given conditions without an observable increase in pressure drop during the experiment. A detailed analytical characterization of hydrotreatment products and catalyst after the experiment was carried out, analysing both physicochemical properties and chemical composition. This work provided valuable results that will allow us further optimization of catalyst performance, in particular, to suppress its deactivation and, thus, extending its lifetime.
Keywords:
bio-oil, hydrotreatment, ablative fast pyrolysis, chemical characterization, NiMo/Al2O3 catalyst
Topic:
Biomass Conversion Technologies for Energy Carriers, Chemicals and Materials
Subtopic:
Oil-based biofuels
Event:
27th European Biomass Conference and Exhibition
Session:
3DV.6.9
Pages:
1507 - 1511
ISBN:
978-88-89407-19-6
Paper DOI:
10.5071/27thEUBCE2019-3DV.6.9
Price:
FREE
