116 results about "Lignocellulosic biomass" patented technology

The present disclosure generally relates to compositions and methods of simultaneously making two unique biointermediates from a single lignocellulosic biomass feedstock, including a hydrophobic biohydrocarbon and a water insoluble hydrophilic cellulosic biopolymer for use in the production of renewable fuels, chemicals, and other carbon neutral materials commonly derived from petroleum and other fossil resources.

The invention discloses a lignocellulose biomass-based hard carbon negative electrode material as well as a preparation method and application thereof. The method comprises the following steps: carrying out hydrothermal pretreatment on lignocellulose biomass by using low-corrosivity maleic acid, and regulating and controlling the composition of the lignocellulose biomass, the maleic acid and the lignocellulose to obtain a precursor rich in lignin and cellulose; in the pyrolysis and carbonization process, the thermal stability of the precursor is improved, and the lignin can more effectively inhibit the rapid concentrated pyrolysis of cellulose, so that the rearrangement of pyrolysis products is weakened. The method is beneficial for preventing overgrowth of hard carbon graphite microcrystals during high-temperature carbonization, so that the hard carbon material with large interlayer spacing and abundant small-size closed pores is prepared. The hard carbon material shows high specific capacity and excellent rate capability when being applied to the negative electrode of the sodium-ion battery. Meanwhile, xylose and furfural generated by decomposition of hemicellulose in a liquid phase can be effectively collected, and full-component utilization of biomass is achieved. The requirements of green production are met, and industrial application is easy to realize.

Composite material in which some hydroxy groups of a lignocellulosic biomass are esterified, wherein the esterified section has short-chain acyl groups with 2 to 4 carbon atoms and long-chain acyl groups with 8 to 18 carbon atoms.

The present invention provides a composition comprising cellulose nanofiber and lignin or a complex thereof for efficiently utilizing lignocellulosic biomass without a residue, and a method for efficiently producing a lignocellulose-derived material from lignocellulosic biomass. The present invention relates to a composition comprising cellulose nanofiber having a sulfate group and a lignin-derived substance, and a method for producing a lignocellulose-derived material.

This disclosure provides formulations and processes that reduce the injection molding cycle times for poly(hydroxyalkanoate) blends which may contain a succinate polymer such as poly(butylene succinate), a filler such as lignocellulosic biomass and other additives. Blending of PHA with the second polymer may increase biodegradability and compostability.

The invention discloses a method for hydrolyzing and saccharifying wood fiber biomass. The method is characterized by comprising the following steps: (1) washing and drying materials; (2) crushing the materials; (3) preparing a material pretreatment solvent; (4) delignification of the material in a pretreatment solvent; (5) filtering the reaction liquid at normal temperature and normal pressure to separate liquid from solid to obtain cellulose; and (6) adding cellulose and polypeptide into deionized water according to a ratio of 2: 1-1: 2 in a solid-to-liquid ratio of 1: 50-1: 100, adding a NaOH solution to adjust the pH value of the solution to 3-8, and reacting at 40-95 DEG C under the protection of nitrogen for 6-16 hours to obtain the product glucose.

The present disclosure provides genetically engineered microorganisms for the simultaneous fermentation of pentose and hexose sugars, for example, glucose and xylose. The microorganisms can be modified to express AtSWEET polypeptides, LST1 polypeptides, mutants thereof, homologs thereof or combinations thereof. Also provided are methods of co-fermenting hexose and pentose sugars, methods of increasing the conversion of lignocellulosic biomass via microbial fermentation, and methods of generating biofuel.

Provided is a method for producing a decomposition product from lignocellulosic biomass, the method comprising a step for heating the lignocellulosic biomass at a temperature of 250°C to 500°C inclusive in the presence of a metal element catalyst. The step is performed in the absence of hydrogen at atmospheric pressure or reduced pressure, and the decomposition product contains at least one selected from the group consisting of an aromatic monomer and a product gas.

Feedstock including an amphiphilic lignocellulosic biomass can be processed using enzymes prior to pulping. The enzymes break down the biomass by disrupting the surface or cell walls or by reducing wax or other components. Such enzymes include cellulases, hemicellulases, laccases, peroxidases, and pectinases. Suitable enzymes can be obtained from secretions of microbes in soil organic matter from soil in which the feedstock was grown. If the pulping process includes steam explosion, such enzy matic processing of a biomass prior to steam explosion will increase absorption of water by the processed feedstock. In steam explosion, due to the increased ability of the processed feedstock to absorb water, steam explosion is more effective in breaking apart the processed feedstock. For other pulping processes, such enzymatic treatments break down the biomass, enabling extraction of the desired components from the processed feedstock through subsequent processing using less energy and fewer chemicals.

The present invention relates to the field of extraction of lignin wherein lignin is separated into a primary lignin. In one aspect, the present invention concerns a method to extract a primary lignin from lignocellulosic biomass comprising lignin. By providing a lignocellulosic biomass and a mixture of water and alcohol in a reactor, maintaining a temperature between 110°C and 180°C in the reactor to allow at least a part of the lignin to be dissolved to form an extract. Adding water to the removed extract to allow a part of the dissolved lignin to precipitate forming a primary lignin and separate it from the solution. In another aspect, the present invention concerns an isolated lignin obtained by the method as a primary lignin.

The invention relates to a method for treating lignocellulosic biomass, comprising: b) a step of acidic or neutral pretreatment of the biomass to produce an acidic or neutral pretreated biomass, which is carried out alternately with b1), b1) a step of alkaline pre-treatment of the biomass in advance under acidic, neutral or alkaline conditions to produce an alkaline pre-treated biomass, followed by c) a step of enzymatic hydrolysis of the acidic pre-treated biomass and / or the alkaline pre-treated biomass to obtain a hydrolyzed biomass, d) a step of solid / liquid separation of the hydrolyzed biomass in sugar form obtained at the end of step c) or a step of solid / liquid separation of the hydrolyzed biomass in sugar form obtained at the end of step c) and then treated in a step following enzymatic hydrolysis of step c), to obtain separated juice and unconverted solid residues, e) a step of recycling said solid residue to the alkaline pretreatment step b ').

The present invention relates to an enzyme cocktail, a method for the deconstruction of lignocellulosic biomass using said cocktail, and a genetically modified microorganism for producing heterologous enzyme aimed at making biomass fermentable into biorenewable products such as biofuels, organic acids, and hydrocarbon.

This invention discloses a method for separating all components of lignocellulosic biomass using a composite solvent system based on oxalic acid, belonging to the field of biomass resource utilization technology. The method uses a composite solvent system composed of propylene carbonate, water, and oxalic acid to pretreat lignocellulosic raw materials; the amount of propylene carbonate is 60%–90% of the composite solvent system, and the mass-to-volume ratio of oxalic acid to the composite solvent system is 0.6–1.2 g / mL; the degradation rate of hemicellulose is greater than 55%, the degradation rate of lignin is greater than 32%, and the retention rate of cellulose is greater than 84%. This invention uses poplar wood as the lignocellulosic raw material, achieving efficient separation of hemicellulose, cellulose, and lignin. The solvent used is green and recyclable, which is of great significance for the pretreatment of lignocellulosic raw materials.

Disclosed is a method for synthesizing a silica reinforced polyester adhesive. The method comprises: dissolving an organic acid and a polyol under a first predetermined set of conditions to obtain an adduct; adding silica to the adduct to obtain a silica-adduct mixture under the first predetermined set of conditions; and adding a Lewis acid catalyst to the silica- adduct mixture under a second predetermined set of conditions to obtain the silica reinforced polyester adhesive. Disclosed also is a method for obtaining a silica from a silica-rich lignocellulosic biomass.

The invention discloses a method for synthesizing a humic acid mineral polymer based on co-liquid catalysis of wet biomass and lignite substances and application of the humic acid mineral polymer. The method comprises the steps that the wet biomass rich in lignocellulose and substances rich in humic acid are mixed, and under modification of a solid foam geopolymer and catalysis of the substances rich in humic acid, the humic acid mineral polymer is obtained. And carrying out co-liquid humification reaction to obtain the humic acid mineral polymer and the humic acid mineral polymer composite material. Compared with a single HTH hydrothermal reaction of wet biomass, the co-liquid humification reaction process greatly improves the efficiency of converting the lignocellulose biomass into fulvic acid and humic acid. The fulvic acid and the humic acid synthesized by the method are superior to mineral source humic acid in performance; the humic acid mineral polymer composite material prepared by the invention is a soil conditioner for improving organic carbon in cultivated land soil, and can also be used as a carrier medium for slow release of high-concentration plant nutrient chemical fertilizer to prevent nutrient loss.

A method of fractionating lignocellulosic biomass includes fractionating lignocellulos biomass in an aqueous phenol-4-sulfonic acid (PSA). The process may provide complete or nearly complete fractionation under mild conditions.

This disclosure proposes a method and application for constructing hierarchical porous carbon materials using low-melting-point eutectic salts in conjunction with bio-templates. The method includes selecting lignocellulosic biomass raw materials with vascular or pore structures, crushing, washing, and drying to obtain biomass powder; mixing at least two alkali metal halides in a eutectic ratio and grinding to obtain a low-melting-point eutectic salt mixture; physically mixing or liquid-phase impregnation mixing the biomass powder and the eutectic salt mixture, followed by drying to obtain a composite precursor; pyrolyzing the composite precursor in a high-temperature reactor under an inert atmosphere to obtain a reaction product; after cooling the reaction product to room temperature, washing it in deionized water to dissolve and separate the inorganic salts; evaporating and crystallizing the washing liquid to obtain a solid product; soaking the washed solid product in dilute acid, washing it with water until neutral, drying, and sieving to obtain the hierarchical porous carbon material.

The invention relates to a method for producing a biofuel by continuous or discontinuous steam cracking of lignocellulosic biomass, characterized in that: - recording a digital model of the optimal steam cracking parameters as a function of the typology of the plant constituents of the biomass; - supplying the steam cracking reactor with heterogeneous biomass; - measuring at least once during the treatment the typology of the plant constituents of the biomass; - controlling the adjustment of the steam cracking parameters as a function of the typology of the plant constituents of the measured biomass and of said digital model.

The present disclosure generally relates to compositions and methods of simultaneously making two unique biointermediates from a single lignocellulosic biomass feedstock, including a hydrophobic biohydrocarbon and a water insoluble hydrophilic cellulosic biopolymer for use in the production of renewable fuels, chemicals, and other carbon neutral materials commonly derived from petroleum and other fossil resources.

The invention relates to the technical field of lignocellulose biomass pretreatment, in particular to a method for quickly and efficiently hydrolyzing lignocellulose biomass by utilizing biological micro-aerobic treatment. According to the method, a specific dosage of calcium peroxide (CaO2) is added into a mixed system containing lignocellulose biomass and inoculated sludge, and a micro-aerobic condition created by decomposition of the calcium peroxide and a synergistic effect of microbial communities in the inoculated sludge are utilized, so that facultative hydrolytic bacteria are directionally enriched, and the activity of hydrolase is up-regulated; the complex structure of the lignocellulose is efficiently destroyed. Compared with an existing micro-aerobic pretreatment technology depending on a high-dose chemical oxidizing agent, the method has the advantages that microbial regulation is taken as a core, the dosage of a chemical agent and residual oxidizing substances are greatly reduced while efficient hydrolysis of lignocellulose is realized, inhibition of the chemical agent on the subsequent biotransformation process is effectively avoided, and the method is suitable for industrial production. And an efficient, economic and environment-friendly pretreatment solution is provided for full-chain resource utilization of lignocellulose biomass.

The present invention provides a method for improving a defoaming effect of a fermentation liquid when lignocellulosic biomass is used. More specifically, the present invention provides a method for producing ethanol from lignocellulosic biomass, the method involving a multiple parallel fermentation step, a multiple semi-parallel fermentation step, or a sequential fermentation step, wherein when the multiple parallel fermentation step is involved, the multiple parallel fermentation step involves a step for adding a defoaming agent to a fermentation liquid containing lignocellulosic biomass, a diastatic enzyme, and yeast; when the multiple semi-parallel fermentation step or sequential fermentation step is involved, the multiple semi-parallel fermentation step or sequential fermentation step involves a step for adding a defoaming agent to a saccharified solution containing lignocellulosic biomass and a diastatic enzyme and / or to a fermentation liquid containing the saccharified solution and yeast; and the defoaming agent includes a nonionic surfactant.

This invention discloses a method for calculating and implanting the continuous pyrolysis rate of lignocellulosic biomass based on thermogravimetric analysis, belonging to the field of energy utilization technology. The method includes: conducting multiple thermogravimetric experiments on lignocellulosic biomass at a specified heating rate, and obtaining the apparent activation energy E based on the Friedman conversion method. α The curve of conversion rate α and the pre-factor A α The continuous curve of the ln value of the product of the reaction mechanism function f(α) and the reaction mechanism function f(α) is obtained, and then the continuous pyrolysis rate is calculated using the Arrhenius formula; a piecewise polynomial is used to calculate E. α -α and ln[A α The pyrolysis rate is recalculated based on the fitted formula, with corrections made for calculation fluctuations and supplementary information for the uncalculated final stage of pyrolysis. The piecewise polynomial is transformed into an array form for embedding, allowing direct embedding of the Arrhenius formula and supplementary equations, thus enabling the calculation and code embedding of the continuous pyrolysis rate of lignocellulosic biomass. This invention provides a methodological reference for calculating the pyrolysis rate during the combustion process of lignocellulosic biomass.

The present invention relates to graphene and its derivatives derived from lignocellulosic biomass including palm kernel shell (PKS) and a method of producing thereof without the use of harmful chemicals and at a low temperature. Particularly, the method of producing graphene and its derivatives from palm kernel shell (PKS), comprising the steps of: carbonizing raw palm kernel shell (PKS) in an inert environment to obtain carbonized form of PKS; subjecting the carbonized form of PKS to graphitization in the presence of catalyst and heating to obtain graphite form of PKS, followed by a multi-step washing step; oxidizing the graphite form of PKS at a temperature of less than or equal to 10 °C; exfoliating the oxidized graphite, followed by neutralizing thereof in the presence of water and an alkali to obtain a graphite oxide suspension; and subjecting the graphite oxide suspension to chemical reduction in the presence of a weak acid to obtain the reduced graphene oxide (rGO), followed by another multi-step washing step.

The invention discloses a Kodamaea ohmeri strain SSK (Kodamaea ohmeri) and an application of the Kodamaea ohmeri strain SSK (Kodamaea ohmeri). The strain is preserved in the China Center for Type Culture Collection on May 20, 2024, and the preservation number is CCTCC M 20241008; the strain is separated from a rotten bamboo sample in the Shengshan of Shanghai, has a function of degrading main inhibitors in the corn straw hydrolysate, has a degradation effect on furfural and 5-hydroxymethylfurfural in the corn straw hydrolysate, and has certain tolerance to the corn straw hydrolysate. A possible yeast strain source is provided for biodegradation of the straw hydrolysate, and a good theoretical research value and a wide application prospect are provided for utilization of lignocellulose biomass.

The invention relates to the field of refining and application of wood fiber biomass, and discloses a lignin-based formaldehyde-free adhesive, a lignin-based plywood and a preparation method and application of the lignin-based formaldehyde-free adhesive and the lignin-based plywood. The lignin-based formaldehyde-free adhesive disclosed by the invention comprises the following components: L-cysteine lignin, and the solid content of the lignin-based formaldehyde-free adhesive is 10-45wt%. The method comprises the following steps: mixing an aqueous solution of L-cysteine hydrochloride and lactic acid with raw materials for pretreatment; performing extraction and vacuum filtration on the obtained suspension to obtain dissolved lignin and hemicellulose filtrate, and performing extraction and purification on the filtrate to obtain L-cysteine lignin; the lignin-based formaldehyde-free adhesive is prepared by uniformly dispersing the L-cysteine lignin in water. According to the invention, the used solvent is green and nontoxic in source, the hydrated lignin-based adhesive with good fluidity is prepared with low solid content, and the prepared plywood shows excellent dry and wet bonding strength, solvent resistance and weather resistance, and meets the preparation requirements of national I-class plywood.

In general, present invention concerns an integrated lignocellulose-to-chemicals biorefinery, enabling production of renewable n-propylbenzene, phenolic oligomers, and carbohydrate pulp from lignocellulosic biomass. And it concerns an integrated biorefinery, enabling production of renewable n-propylbenzene, phenolic oligomers, and carbohydrate pulp from lignocellulosic biomass.

A method for processing a lignocellulose biomass material with a moisture content below 10 weight-% and an ash content below 1.0 weight-% includes: adding an acid catalyst to the lignocellulose biomass material; after adding the acid catalyst, thermally treating the lignocellulose biomass material with steam at an elevated pressure and an elevated temperature in at least one reactor; discharging the lignocellulose biomass material and blow steam from the at least one reactor using a steam explosion discharge device; and forming pellets and / or briquettes from at least part of the discharged thermally treated lignocellulose biomass material.

A composite material consisting of a lignocellulosic biomass having a moisture content of 5 to 10 wt% and an iron material comprising at least 30% iron oxides, the composite material having a Fe / C molar ratio of 3 to 6.5.

In on example, a method of plasticizing at least a portion of lignin within a lignocellulosic biomass by mixing the biomass with anhydrous ammonia at a sub-ambient temperature and continuously conveying the mixture of lignocellulosic biomass and anhydrous ammonia through a reactor. At least a portion of the anhydrous ammonia is removed from the mixture. The lignocellulosic biomass having plasticized lignin is molded into a repeated shape.