Effect of Carboxylic Acids on Corrosion of Type 410 Stainless Steel in Pyrolysis Bio-Oil

Abstract

Biomass-derived oils are renewable fuel sources and commodity products and are proposed to partially or entirely replace fossil fuels in sectors generally considered difficult to decarbonize such as aviation and maritime propulsion. Bio-oils contain a range of organic compounds with varying functional groups which can lead to polarity-driven phase separation and corrosion of containment materials during processing and storage. Polar compounds, such as organic acids and other oxygenates, are abundant in bio-oils and are considered corrosive to structural alloys, particularly to those with a low-Cr content. To study the corrosion effects of small carboxylic acids present in pyrolysis bio-oils, type 410 stainless steel (SS410) specimens were exposed in bio-oils with varying formic, acetic, propionic and hexanoic acid contents at 50 °C during 48 h exposures. The specific mass change data show a linear increase in mass loss with increasing formic acid concentration. Interestingly, a mild corrosion inhibition effect on the corrosion of SS410 specimens was observed with the addition of acetic, propionic and hexanoic acids in the bio-oil.

Risk Minimization in Scale-Up of Biomass and Waste Carbon Upgrading Processes

“…Additionally, trace particulates or other components of real feedstocks are often responsible for equipment plugging, another important phenomenon that can be investigated (and mitigated) in lab-sized units. Degradation resistance of process equipment such as reaction and holding vessels is also suitable to observe in lab-sized experimental units, as material corrosion behavior does not vary with unit size. , Results of these experiments can inform the project team of the necessity to use certain materials in specific process units, specifying pioneering plant capital cost estimations.…”

“…Degradation resistance of process equipment such as reaction and holding vessels is also suitable to observe in lab-sized experimental units, as material corrosion behavior does not vary with unit size. 29 , 30 Results of these experiments can inform the project team of the necessity to use certain materials in specific process units, specifying pioneering plant capital cost estimations.…”

Characterization and Electrochemical Analysis of Acidic Condensate-Induced Corrosion on Aluminized Coating on Steel in Residential Heaters

“…This allowed the condensate liquid to be contained inside the apparatus during the corrosion test and in contact with the surface of aluminized steel at room temperature. Immersion tests are commonly used to evaluate the corrosion behavior of metallic materials in previous works [21][22][23][24][25].…”

Contribution of LDI and MALDI for the Characterization of a Lignocellulosic-Based Pyrolysis Bio-Oil

“…Due to their origins, bio-oils present numerous heteroatoms, affecting their storage and their properties. In particular, the presence of many oxygenated compounds is a substantial problem, as it leads to corrosion effects and is also one of the main factors of their low calorific values. , Thus, bio-oils need to be upgraded through adequate chemical treatments to be usable. The characterization of these bio-oils at the molecular level is a beginning step to monitoring upgrading processes.…”