Petroleo Brasileiro has patented a hydrothermal liquefaction process for producing crude bio-oil from lignocellulosic biomass. The method utilizes a catalyst derived from castor bean hulls, resulting in a liquid stream with reduced oxygen, water content, and acidity, offering a sustainable biofuel production alternative. GlobalData’s report on Petroleo Brasileiro gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Petroleo Brasileiro, Microscale biofuel reactors was a key innovation area identified from patents. Petroleo Brasileiro's grant share as of June 2024 was 45%. Grant share is based on the ratio of number of grants to total number of patents.
Hydrothermal liquefaction process for producing crude bio-oil
The patent US12043800B2 outlines a method for producing crude bio-oil from lignocellulosic biomass with high moisture content. The process begins by mixing water or a recycled aqueous stream with lignocellulosic biomass to create a mixture with a solid content of 5% to 20% by weight. A catalyst, derived from biomass residue, is then added at a concentration of 1% to 10% m/m relative to the biomass. This mixture undergoes hydrothermal liquefaction (HTL) at temperatures between 250 to 300°C and pressures of 900 to 1300 psig, resulting in various reaction products. These products are subsequently cooled and separated into gaseous, solid, oily, and aqueous streams, with the aqueous stream containing the catalyst being recycled back into the mixing step.
The patent further details the configuration of a liquefaction reactor that facilitates the HTL process, allowing for the recycling of gaseous streams to maintain a reducing atmosphere or to generate syngas. The oily stream produced is noted to contain renewable molecules, while the solid stream can serve as a raw material for adsorbents. The catalyst, which can be a homogeneous type, is specifically derived from the calcination of castor oil production residues, enhancing bio-oil yield by at least 30% compared to non-catalyzed methods. The catalyst is designed to be reusable and soluble in water, promoting the recycling of the aqueous fraction and improving bio-oil yield through the incorporation of oxygenated compounds. The resulting bio-oil is characterized by lower oxygen content, reduced water percentage, and decreased acidity compared to bio-oils produced via pyrolysis without catalysts.
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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
