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Title: Low-Severity Hydroprocessing to Stabilize Bio-oil: TechnoEconomic Assessment

The impetus for this study was the suggestion that recent developments in fast pyrolysis (FP) bio-oil production had indicated instability of the bio-oil in storage which might lead to unacceptable viscosity increases. Commercial operation of FP in Finland began in 2014 and the distribution of the bio-oil to isolated users has been proposed as the long-term plan. Stability of the shipped bio-oil therefore became a concern. Experimental results at PNNL with low-severity hydroprocessing of bio-oil for stabilization has validated a process in which the stability of the bio-oil could be improved, as measured by viscosity increase following storage of the product at 80 °C for 24h. In the work reported here the assessed process configuration consists of fast pyrolysis followed by low temperature and pressure hydroprocessing to produce a stable fuel oil product. The product could then be stored for an extended period of time without significant viscosity increase. This work was carried out as part of a collaborative project between Technical Research Centre of Finland (VTT) and Pacific Northwest National Laboratory (PNNL). The public funding agents for the work were Tekes in Finland and the Bioenergy Technologies Office of the U.S. Department of Energy. The effort was proposed asmore » an evaluation of the process developed in earlier collaboration and jointly invented by VTT and PNNL researchers.« less
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  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
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Resource Type:
Technical Report
Research Org:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
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Country of Publication:
United States
biomass; pyrolysis; hydrotreating; catalysis; stabilization