NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC.
Catalytic Upgrading of Sugars
to Hydrocarbons Technology
Pathway
Mary Biddy National Renewable Energy Laboratory
Susanne Jones
Pacific Northwest National Laboratory
NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency & Renewable Energy, operated by the Alliance for Sustainable Energy, LLC, under contract DE-AC36-08GO28308.
Pacific Northwest National Laboratory is operated by Battelle for the United States Department of Energy under contract DE-AC05-76RL01830.
Technical Report NREL/TP-5100-58055 PNNL-22319 March 2013
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Catalytic Upgrading of Sugars to Hydrocarbons Developing Technology Pathway Cas to Understand the Cost of Converting Biomass to Hydrocarbon Fuels
In support of the Bioenergy Technologies Office, the National Renewable Energy Laboratory (NREL) and the Pacific Northwest National Laboratory (PNNL) are undertaking studies of biomass conversion technologies to hydrocarbon fuels to identify barriers and target rearch toward reducing conversion costs.
Process designs and preliminary economic estimates for each of the pathway cas were developed using rigorous modeling tools (Aspen Plus and Chemcad). The analys incorporated the best information available at the time of development, including data from recent pilot- and bench-scale demonstrations, collaborative industrial and academic partners, and published literature and patents. The economic results of the analys are in the process of further refinement and will be published in FY13 and FY14 design reports. This report summarizes the preliminary technical data ud for the models and identified data gaps.
This technology pathway ca investigates the catalytic conversion of solubilized carbohydrate streams to hydrocarbon biofuels, utilizing data from recent efforts within the National Advanced Biofuels Consortium (NABC) in collaboration with Virent, Inc. Technical barriers and key
Diel,
Jet)
Key Highlights
•The catalytic upgrading of sugars to hydrocarbons pathway utilizes a catalytic conversion route for the production of hydrocarbon biofuels from a solubilized carbohydrate stream, leveraging prior experience in cellulosic sugar production.
•This pathway produces drop-in fuel blendstocks over a wide range of products that can be directly blended without further catalytic or chemical modification, including potential
for production of biomass-derived chemicals, such as para-xylene for PET saturated
polyester polymers.
•Catalytic conversion has the flexibility to utilize a wide range of biomass-derived deconstruction products that would be detrimental to microorganisms in fermentative
conversion process, including organic acids, furanics, and lignin deconstruction
products.
•There is potential to maximize synergistic benefits with upstream sugar production and biomass deconstruction steps (pretreatment/enzymatic hydrolysis) and to explore new co-product opportunities.
•Important rearch needs for this pathway include the production of hydrolysate streams tailored for catalytic upgrading, the design of catalysts with enhanced lectivities toward desired product slates, and the development of routes for lignin utilization.
Process Design Details
音乐会英语The process described here us co-current dilute-acid pretreatment of lignocellulosic biomass (corn stover), followed by enzymatic hydrolysis (saccharification) of the remaining cellulo, followed by catalytic conversion of the resulting gluco, xylo, and other solubilized carbon components to hydrocarbon fuels in the gasoline, jet, and diel fuel ranges. The process design also includes feedstock handling and storage, hydrolysate conditioning, product recovery, wastewater treatment, lignin combustion, product storage, and required utilities.
运动会加油稿200字左右Feed handling and preparation:Corn stover, with a mean particle size of <0.25 inch, carbohydrate content of 59 wt%, and moisture content of <20 wt%, is delivered at a rate of 2,000 dry metric tons p
er day. All costs associated with feed handling operations are included in the delivered feedstock cost values. From there, the biomass is conveyed to the pretreatment reactor. This area is identical to the 2011 biochemical ethanol design (Humbird et al. 2011). Pretreatment and conditioning: The biomass is treated with dilute sulfuric acid catalyst (acid loading ranging from 0–3 wt%) at a high temperature (130°–220°C) for a short time (2–30 minutes) to liberate the hemicellulos sugars and break down the biomass for enzymatic hydrolysis. The whole pretreated slurry is adjusted to pH ~5 for enzymatic hydrolysis.
思源计划
周其The current design utilizes biomass pretreatment process proven effective and economically viable for cellulosic ethanol fermentation, which requires a hydrolysate stream primarily compod of monomeric sugars. Catalytic process can convert a wider range of components derived from biomass in addition to monomeric sugars to hydrocarbon products, including oligomeric sugars, C5 and C6 sugars, and degradation products from the carbohydrate fraction, as well as lignin intermediates. This leads to potentially higher overall yields by utilizing a larger
