System capable of adding cellulosic biomass to a digestion unit operating at high pressure and related method for cellulosic biomass treatment
A cellulose and biomass technology, applied in the field of cellulose biomass treatment, can solve the problems of low energy density of ethanol
Active Publication Date: 2016-08-24
SHELL INT RES MAATSCHAPPIJ BV
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- Summary
- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
Also, when used as a fuel, ethanol has a low energy density
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0152] Example 1: Solvent impregnation effect and factors affecting the transportation of various cellulosic biomass.
Embodiment 1A
[0153] Example 1A: 1.5 grams of mixed cork chips (14% moisture) with nominal dimensions of 8mmx4mmx3mm chips were put into 2.5cm of mixed organic / water solvent (25% of 2-propanol and 20% ethanol) layer. About 50% of the wood chips fell to the bottom of the vial, while the remaining 50% remained floating on the surface, although mixing broke the surface tension. Similar results were obtained when water was substituted for the mixed organic / aqueous solvent.
Embodiment 1B
[0154] Example 1B: Example 1A was repeated except that 3.5 grams of cork chips were added to 8 dram vials, and solvent was added subsequently to obtain a 2.6 cm layer of mixed organic / aqueous solvent in the bottles. Contents were mixed and allowed to stand. About 60% of the wood chips remained at the bottom of the bottle, and about 40% floated on the upper surface.
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Abstract
When processing cellulosic biomass, it may be desirable for process efficiency purposes to operate the digestion unit without complete depressurization. The method of processing cellulosic biomass may comprise: providing a biomass conversion system comprising a pressurized zone and a digestion unit operably interconnected; providing cellulosic biomass at a first pressure; converting at least a portion of the cellulosic biomass to introducing the substance into a pressurized zone, and then pressurizing the pressurized zone to a second pressure higher than the first pressure; after pressurizing the pressurized zone, transferring at least a portion of the cellulosic biomass from the pressurized zone to a digestion unit, the a digestion unit at a third pressure less than or equal to the second pressure but greater than the first pressure; and digesting at least a portion of the cellulosic biomass in the digestion unit to produce a hydrolyzate comprising soluble carbohydrates in a liquid phase.
Description
technical field [0001] The present invention relates generally to the processing of cellulosic biomass, and more particularly to biomass conversion systems and methods in which cellulosic biomass solids are allowed to be fed to a digestion unit operating at elevated pressures of 30 bar or higher. Background technique [0002] Much attention has been devoted to developing alternative energy sources to fossil fuels. A promising alternative to fossil fuels is biomass, especially cellulosic biomass such as plant biomass. As used herein, the term "biomass" refers to living or recently living biological matter. Complex organic molecules within biomass can be extracted and broken down into simple organic molecules that can then be processed into industrial chemicals or fuel blends (ie, biofuels) through known chemical transformations. Despite the potential of biomass, especially plant biomass, in this regard, energy and cost-effective methods for converting biomass to said substa...
Claims
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IPC IPC(8): C13K1/02C12P19/02
CPCC13K1/02C10L1/02C10G1/002C10G1/065C10G3/42C10G2300/1014Y02P30/20B01J19/24B01J19/245B01J2219/24
Inventor T·L·弗拉沃斯J·B·鲍威尔J·N·切达
Owner SHELL INT RES MAATSCHAPPIJ BV