Materials Issues in Thermochemical Production, Processing and Utilization of Bio-Oil

摘要

Biomass-derived oils are a renewable resource which offer potential for replacing a portion of fossil derived fuels currently in use. However, bio-oils are composed of a large number of organic compounds, many of which contain oxygen. Some of these oxygenates have been shown to degrade metallic and nonmetallic materials that are candidates for containing and sealing bio-oils in various stages of production, processing and utilization. A wide range of corrosion studies has been used to assess the effect of biomass-derived oils on materials. Selected bio-oils have been chemically characterized and laboratory corrosion tests conducted to assess the effects of bio-oil on metallic and non-metallic materials. Studies have addressed the effect on metallic materials of exposure in a co-processing environment where treated bio-oil was processed with a petroleum-derived oil. To address the role of various oxygen-containing compounds on corrosion, chemical analyses and corrosion tests have been conducted on bio-oil samples that have undergone various levels of oxygen removal through hydrotreating. In addition, corrosion samples provided for testing in operating biomass processing systems have been examined following exposure as have degraded components removed from bio-oil production and processing systems. Results of chemical analyses, laboratory corrosion tests and sample examinations are reported.