Bio-Pyro Oils & Fuels Screening
This matrix provides a listing of standard bio-pyro oils and fuels screening routines. Specific screening routines are mapped to outcomes relevant to bio-oil/bio-fuel synthesis as well as downstream refining and upgrading.
Please contact us directly if interested in pursuing these screening procedures for your sample. The screening procedures will be conducted in the E-RISE laboratory in ERAD 300.
| Screening Test Name | Main Outcomes Pertaining to Synthesis | Main Outcomes Pertaining to Refinery Integration | Relevant ASTM Analog |
| Volumetric Karl Fischer Titration | Measures how much internal water is produced by dehydration reactions during pyrolysis. Tells chemists if the reactor parameters are driving unwanted water creation. | Quantifies water content, which lowers heating value. Refiners use this to predict phase separation behavior and prevent rust in refinery lines. | ASTM E203, ASTM D5530 |
| Carbonyl Titration & Accelerated Aging | Tracks highly reactive aldehydes and ketones. High counts signal that the initial synthesis step left too many unstable chemical components in the mix. | Predicts chemical shelf-life. It measures how quickly the liquid will polymerize, form thick sludge, or plug fuel filters while sitting in storage tanks. | ASTM E3146 |
| Carbon Functional Group Analysis (¹³C NMR) | Pinpoints the exact structural fragments (like levoglucosan or carboxyl groups) generated by biomass breakdown. Helps tune reactor temperatures to maximize desired compounds. | Maps out complex aromatics and acid networks. Flags whether deep hydrotreating with hydrogen gas is required to turn the fluid into a clean hydrocarbon. | ASTM D5292 |
| Elemental Analysis (CHNO via Combustion) | Determines the raw chemical formula of the crude bio-oil. A lower initial Oxygen count tells scientists that a catalyst configuration is successfully performing raw deoxygenation. | Gives the precise Oxygen weight percentage. Refinery engineers use this number to calculate exactly how much pressurized hydrogen gas will be required during hydroprocessing loops. | ASTM D5291 |
| Inorganic Trace Metals (ICP-OES) | Tracks how much ash, soil, or alkali minerals from raw feedstocks leaked through reactor separators into the final fluid product. | Flags trace elements (like Sodium, Potassium, and Calcium) that are known to permanently poison, foul, or deactivate expensive downstream refining catalysts. | ASTM D5185 |
| Biogenic Carbon Content (¹⁴C Analysis) | Verifies that the synthesized fuel matrix originates purely from renewable biological material rather than fossil contaminants. | Quantifies the exact blend ratio of green fuel to traditional petroleum. Provides legal verification metrics needed to qualify for environmental tax credits. | ASTM D6866 |
| Rapid Corrosivity Screening | Evaluates structural compatibility by measuring how aggressively raw organic acids attack test metals at various reaction stages. | Flags if the liquid can be transported through standard steel pipelines, or if specialized, corrosion-resistant alloy materials are required for handling. | ASTM D130 |
| Ash Content Assessment | Measures the solid mineral residue left behind when the bio-oil burns completely. Helps researchers choose cleaner starting biomass feedstocks. | Predicts engine wear. High ash counts mean solid particles will deposit on fuel injectors and power turbine blades, causing catastrophic mechanical fouling. | ASTM D482 |
| Acid Number Determination (Potentiometric Titration) | Measures Carboxylic Acid Number (CAN) and Total Acid Number (TAN). Tells chemists if cracking parameters are generating highly acidic, low-quality organic fractions. | Quantifies the corrosive potential of the fluid. Refinery engineers use this score to decide if the oil requires deep chemical upgrading before touching process infrastructure. | ASTM D664 |
| Determination of Phenolic Groups (Revised Folin-Ciocalteu) | Quantifies the abundance of complex phenolic compounds derived from the breakdown of biomass lignin. Tracks how well the reactor temperature is fracturing solid structures. | Phenols contribute heavily to the fuel's chemical instability and heavy weight. This test tracks the reduction of heavy aromatics during downstream processing. | ASTM D7575 / Colorimetric |
| Determination of Hydroxyl Groups (³¹P NMR) | Profiles the exact distribution of aliphatic, phenolic, and carboxylic hydroxyl (-OH) functional groups. Maps how oxygen atoms are bound up across different molecules. | High hydroxyl counts directly lower the fuel's volatility and combustion energy. Refiners use this tracking loop to optimize deoxygenation catalysts. | Multi-nuclear NMR frameworks |
| Quantification of Semi-Volatile Oxygenates (GC/MS) | Identifies and quantifies specific semi-volatile chemical species (like furfurals and guaiacols) in the raw bio-oil stream. | Pinpoints individual oxygenated impurities that must be completely stripped away during hydrotreating to match commercial diesel or gasoline purity targets. | ASTM D4307 / GC/MS speciation |
| Gross & Net Heating Value (Bomb Calorimetry) | Determines the raw energy density (MJ/kg or BTU/lb) of the synthetic fuel. Tracks whether reactor conditions are generating highly concentrated, energy-dense organic molecules or low-value waste. | Sets commercial pricing index and blend ratios for final fuel products. Refiners require this value to calculate how much bio-oil must be blended to meet renewable quotas. | ASTM D240, ASTM D4809 |
| Density & Specific Gravity (Digital Density Meter) | Monitors physical phase changes and fluid mass yields directly from the pyrolyzer. Sudden spikes in density indicate over-cracking or heavy resin accumulation. | Essential for calculating refinery mass balances, pump hydrodynamics, and tank storage capacities. Critical for clean injection and combustion control. | ASTM D4052, ASTM D7042 |
| Nitrogen & Sulfur Speciation (Combustion Flue Analysis) | Identifies if problematic nitrogen or sulfur contaminants from specific agricultural feedstocks (like waste sludge or manure) are carrying over into the oil. | Essential for emissions screening. High nitrogen and sulfur poisons refinery hydrotreating catalysts and violates commercial emissions limits, requiring aggressive chemical removal. | ASTM D5762 (N), ASTM D4294 (S) |
| Methanol & Volatile Adulterants (Headspace GC-FID) | Tracks residual processing solvents or alcohol additives used during extraction, ensuring that synthesis cleaning loops run with minimal chemical carryover. | Serves as a major safety validation. Even trace amounts of volatile residual alcohols drastically lower the fuel’s flash point, turning stable bio-oil into an explosion hazard in storage. | ASTM D2699 / Headspace GC |
| Phase Stability & Water Miscibility Index | Tracks whether a synthesis recipe is yielding a single, uniform liquid phase or a messy, multi-layered fluid emulsion that will require downstream separation steps. | Tells refiners if the bio-crude will instantly phase-separate into sludge layers when mixed with petroleum-derived streams during co-processing in fluid catalytic crackers. | ASTM D7061 |