Abstract
Bio-oils derived from biomass contain organic species and acids that can be corrosive to steel-based structural materials used for pipelines and storage tanks. It is, therefore, important to assess corrosivity of organic constituents in bio-oils and identify ferrous alloys with sufficient corrosion resistance. In this work, lactobionic acid, formic acid and catechol were selected as corrosive constituents in bio-oils and used to formulate simulated bio-oils 4 ferrous alloys, including 2.25Cr-1Mo steel and type 410, 201 and 316L stainless steels, were tested by Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization. The corrosivity of each simulated bio-oils was assessed using R2, a charge transfer limiting resistance fitted from EIS spectra. While 2.25Cr-1Mo steel exhibited active corrosion with low R2 values, the stainless steels showed high R2 values associated with passive state. The values of R2, considered proportional to the protectiveness of the passive film, appeared lower in lactobionic acid than in the other simulated bio-oils for the stainless steels, suggesting that lactobionic acid could be more aggressive to passive film than the other constituents of bio-oils. The overall goal of this work is to systematically study the impact of selected bio-oil constituents on corrosion of candidate structural materials for bio-oil production, transport, and storage, as well as provide feedback for potential optimization of bio-oil chemistries to reduce the risk of corrosion.
| Original language | English |
|---|---|
| Article number | 12895 |
| Journal | NACE - International Corrosion Conference Series |
| Volume | 2019-March |
| State | Published - 2019 |
| Event | Corrosion Conference and Expo 2019 - Nashville, United States Duration: Mar 24 2019 → Mar 28 2019 |
Funding
This research was sponsored by the U.S. Department of Energy, Bioenergy Technologies Office. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). This research was sponsored by the U.S. Department of Energy, Bioenergy Technologies Office. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up,irrevocable,world-widelicensetopublishorreproducethepublishedformofthismanuscript,orallow others to do so, for United States Government purposes. The Department of Energy will provide public accesstotheseresultsoffederallysponsoredresearchinaccordancewiththeDOEPublicAccessPlan (http://energy.gov/downloads/doe-public-access-plan).
| Funders | Funder number |
|---|---|
| DOE Public Access Plan | |
| United States Government | |
| U.S. Department of Energy | |
| Bioenergy Technologies Office | DE-AC05-00OR22725 |
Keywords
- Bio-oil corrosion
- Biomass
- EIS
- Stainless steel
- Structural material