Biofuel, CNSL Pyrolysis Oil

The primary raw material for CNSL pyrolysis oil is cashew nut shell liquid (CNSL), a viscous, dark brown natural phenolic liquid found in the honeycomb structure of cashew nut shells. CNSL itself is a byproduct of cashew processing, composed mainly of anacardic acid , cardol, and cardanol, with trace amounts of other alkenyl phenols-these components lay the foundation for the unique properties of CNSL pyrolysis oil. The use of this non-food raw material ensures the biofuel is sustainable and does not compete with food production or cause deforestation.

Renewable Fuel Applications

- Diesel Blendstock: The most common application, with 5–20% blending ratio with diesel for use in industrial boilers, generators, farm machinery, and marine auxiliary engines. Its high energy density and low emissions make it suitable for heavy-duty industrial and agricultural scenarios;

- Sustainable Aviation Fuel (SAF) Feedstock: After hydrodeoxygenation upgrading, it can be used as a blendstock for aviation fuel , supporting the aviation industry's decarbonization efforts;

- Direct Combustion: Upgraded CNSL pyrolysis oil can be directly used in low-speed diesel engines, kilns, and furnaces, replacing fossil diesel and reducing carbon footprints.

High-Value Chemical Applications

- Phenolic Resins & Epoxy Curing Agents: Cardanol extracted from CNSL pyrolysis oil replaces petroleum-based phenol to produce high-performance resins, used in coatings, adhesives, and friction materials (e.g., brake linings);

- Oilfield Chemicals: Used as emulsifiers, corrosion inhibitors, and wetting agents, suitable for high-temperature and high-salinity oil reservoirs;

- Lubricant Additives: Its phenolic compounds and long-chain hydrocarbons provide antioxidant and anti-wear properties, used in industrial lubricants;

- Other Chemicals: Can be further processed into surfactants, biocides, and pharmaceutical intermediates (e.g., anacardic acid for antimicrobial applications).

Other Applications

The biochar byproduct from pyrolysis is used as a soil amendment to improve soil fertility or as a carbon sequestration agent. Pyrolysis gas is reused for process heating or power generation, realizing full utilization of resources and reducing production costs.

With the global push for net-zero emissions and the growing demand for sustainable biofuels and green chemicals, CNSL pyrolysis oil, as a low-carbon, non-food, and dual-value product, is poised for significant growth in production scale and application scope in the coming years.