摘要:
In this disclosure, a process for producing biomass pellets and sugars from cellulosic biomass is provided, comprising: extracting the feedstock with steam and/or hot water and optionally with an acid catalyst, to produce cellulose-rich solids and an extract liquor containing hemicellulosic oligomers and lignin; separating the cellulose-rich solids from the extract liquor; filtering the extract liquor to remove at least some of the lignin, thereby generating a filter permeate comprising cleaned extract liquor containing the hemicellulosic oligomers and a filter retentate comprising a lignin-rich stream; hydrolyzing the hemicellulosic oligomers in the cleaned extract liquor with an acid or enzymes, to generate hemicellulosic monomers which are recovered; and pelletizing the cellulose-rich solids to form biomass pellets, wherein the pelletizing utilizes at least some of the lignin-rich stream as a binder or binder component.
摘要:
A method of calcining green petroleum coke which includes separating the green coke having a particle size of between 0.1 mm and 50 mm into undersized and oversized fractions, pelletizing the undersized fraction with a binder to form pelletized coke, combining the oversized fraction and the pelletized coke to form a feed mixture, and calcining the feed mixture to form calcined coke. The method includes the addition of a pulverization step wherein all the green coke is pulverized before pelletization and the pellets are then calcined to produce a pelletized calcined coke product.
摘要:
A method of calcining green petroleum coke which includes separating the green coke having a particle size of between 0.1 mm and 50 mm into undersized and oversized fractions, pelletizing the undersized fraction with a binder to form pelletized coke, combining the oversized fraction and the pelletized coke to form a feed mixture, and calcining the feed mixture to form calcined coke. The method includes the addition of a pulverization step wherein all the green coke is pulverized before pelletization and the pellets are then calcined to produce a pelletized calcined coke product.
摘要:
Biofuel composition comprising waste coffee grounds (WCG). It is preferably solid, formed as briquettes, pucks or pellets, the pellets being suitable for combustion in a biomass boiler. Preferably it comprises at least 50% wt WCG, even more preferably at least 75%. At least half of this quantity is preferably made up of waste coffee grounds from the manufacture of instant coffee (IWCG). The biofuel may additionally contain a fibrous filler (sawdust, coffee bean husks), preferably less than 50% wt, and a binding agent (lignosulphonate, glycerol), preferably up to 10% wt. Other possible ingredients are oxidisers like sodium / potassium nitrate and processing agents like starch (also a binder). The biofuel preferably has a durability of at least 60% and a net calorific value of 16-24 MJ/kg. A method of producing such biofuel is also claimed, by compressing suitable feedstock into pellets etc. The WCG may be dried to a moisture content of 6-20%. Coffee oil is preferably extracted therefrom, then the WCG are mixed with other ingredients and the feedstock may be conditioned through treatment with steam, then pressed / extruded through a die having boreholes into pellets which are further cooled. A relevant apparatus is also claimed.
摘要:
A process for torrefaction of biomass is provided in which biomass and fluidizing gas are added to a fluidized bed reactor, wherein the fluidizing gas comprises a gas from the fluidize bed reactor and air, wherein the gas leaving the fluidize bed reactor has an oxygen content of less than 8 volume percent, wherein an oxygen content of the fluidizing gas is between 10 volume percent and 14 volume percent, and wherein the oxygen content of the fluidizing gas is adjusted with the air; wherein said biomass is heated by increasing the temperature of said fluidized bed reactor; wherein said biomass is maintained within said fluidized bed reactor for a predetermined time, wherein water is removed from set biomass; wherein volatile organic compounds associated with said biomass are vaporized; wherein the biomass is combusted with the oxygen in the fluidized gas added to said reactor and said biomass is torrefied; wherein said volatile organic compounds are combusted to help maintain the temperature of said fluidized bed reactor; and wherein the torrefied biomass is formed into pellets at a temperature of 90 °C to 200 °C.
摘要:
A carbonaceous compact is provided by the present disclosure that includes a body having a partially or fully carbonaceous biomass composition and an adhesive additive. The adhesive additive includes a starch and a hydroxide. The porous nature of the carbonaceous material provides means for nutrient retention or filtering means. Carbon is activated through chemical or thermal reaction from pyrolyzed wood/nut. A method of processing the carbonaceous compact is also provided that comprises combining a composition of combustible biomass materials, drying the composition, adding the adhesive additive, adding any further additivies, such as silica and beneficial bacteria. The composite biomass is processed into a shapeform, and then the shapeform is partitioned into individual pieces that are compatible with existing handling methods. In one form the processing is formed at about 500°C so that biochar is formed, while processing above 518°C - 572°C carbon is formed with subsequent activation.
摘要:
A method to process cellulose fibres, preferably including wood fibres, comprises the steps: Deriving first fibres having a first property from a first raw material comprising cellulose fibres, Milling the first fibres to provide milled fibres, preferably with an average characteristic fibre dimension greater than 100 µm, Drying the first fibres to provide dried fibres having a residual moisture less than 10% by weight, Adding one or more polymers, preferably including Lignin, to the dried fibres to provide a predetermined mixture including a polymer weight fraction of at least 5%, Processing the predetermined mixture to provide granules with an average characteristic granule dimension between 2 to 6 mm.