Swell Behavior Of Elastomers With A Hydrothermal Liquifaction Bio-Crude And A Fast Pyrolysis Bio-Oil

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Product Number: 51321-16565-SG

Author: Michael Kass/ Christopher Janke/ Dino Sulejmanovic/ Jiheon Jun/ Gavin Warrington/ James Keiser

Publication Date: 2021

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The compatibility of seventeen elastomer materials with two heavy biofuels (fast pyrolysis bio-oil and hydrothermal liquefaction (HTL) bio-crude) and diesel was assessed through volume change measurements. The elastomers included two fluorocarbons, six acrylonitrile rubbers (NBRs), and one each of fluorosilicone, neoprene, polyurethane, silicone, epichlorohydrin rubber (ECO), a blend of polyvinyl chloride and NBR (OZO), styrene butadiene rubber (SBR), hydrogenated NBR (HNBR) and ethylene propylene diene monomer (EPDM). The specimens were immersed in each test fuel for four weeks at 50oC and then measured for volume change. Afterwards, the specimens were dried, and the volume was remeasured. In general, the bio-oil produced unacceptable swelling in the fluoroelastomers, ECO, OZO, neoprene, polyurethane, SBR, HNBR, EPDM, silicone and five of the NBRs. In most cases, the HTL bio-crude produced lower (though still unacceptable) swelling than the bio-oil. Materials that showed good compatibility with the HTL biocrude were the fluoroelastomers, OZO, and silicone.

Key words: elastomer, bio-oil, bio-crude, compatibility, volume change