Pilot Microwave Assisted Pyrolysis System
The Center has recently installed a pilot Microwave Assisted Pyrolysis (MAP) system in its pilot lab. The system is designed to process biomass feedstocks ranging from corn stover to wood chips to MSW to bio-oils, burnable gas, and char solids. The technical advantages of microwave assisted pyrolysis (MAP) over conventional pyrolysis include: (1) Microwave heating is uniform and easy to control; (2) It does not require high degree of feedstock grinding (e.g., large chunk of wood logs can be used) and can handle mixed feedstock (e.g., municipal solid wastes); (3) The conversion products (pyrolytic gas and bio-oils) are cleaner than those from gasification and conventional pyrolysis because our process does not have to use biomass powder and does not require agitation and fluidization; (4) The syngas produced has higher heating value since it is not diluted by the carrying gas for fluidizing the biomass materials. (5) Microwave heating is a mature technology and development of microwave heating system for biomass pyrolysis is of low cost. Wood wastes, sludge, slaughter wastes, municipal solid wastes have been tested with microwave pyrolysis. This research is funded in part by IREE, LCCMR, DOE, USDA, and DOT.
Last Updated on Monday, 30 March 2009 21:50
New IREE funding for our thermochemical conversion R&D
Initiative for Renewable Energy and the Environment awards $4.85 million to seven breakthrough projects including our project titled "Catalytic Reforming of Liquids and Gases from Thermochemical Conversion of Biomass."
Liquid fuels account for more than 45% of the total energy use in the U.S. Liquid fuels have high energy densities, are easy to transport, store, and handle, and are distributed through established infrastructure. Therefore biomass derived liquid fuels have a great potential to replace petroleum-based liquid fuels. Pyrolysis is the most common thermochemical process to convert solid biomass to bio-oils. Use of as produced bio-oils is impractical because of their poor combustion properties, low heating value, and high storage instability. The goal of the research is to develop processes to turn liquids and gases from thermochemical conversion of biomass to high quality hydrocarbon liquid fuels. Our research will be focused on the understanding and development of several innovative conversion and upgrading/reforming processes that (1) convert solid biomass to bio-crude and syngas using catalytic pyrolysis and gasification , (2) upgrade bio-crude to high quality liquid and (3) catalytically reform syngas to liquid fuels. The mechanistic studies will be conducted in Ruan and Ye’s labs with in situ pyrolysis analyzers and other advanced instruments.
This collaborative project involves U of MN investigators Roger Ruan, Lanny Schmidt, and Paul Chen, and U of TN Philip Ye.
Last Updated on Tuesday, 31 March 2009 20:56
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Mass Culture of Microalgae for Biofuels
 The Center for Biorefining received $1 million funding from MN DOC, MCES, and IREE to support research on developing transferable technologies for mass culture of microalgae utilizing nutrients from wastewater and carbon source from flue gas for biofuel production. Harvested algae will be used as a biomass feedstock for biodiesel and other renewable energy production. The specific objectives of the project are to (1) test and develop photobioreactors (PBR), (2) study the growth characteristics of some collected algae strains, (3) evaluate and develop harvest and oil extract processes. Several PBRs were developed and studied. More than 30 strains were screened, and some of them were found to grow well on wastewater. A simple harvest technique was also developed. Production of high oil content microalgae for biodiesel fuel, coupled with wastewater treatment and flue gas emission control, provides significant environmental benefits and improves the economic feasibility of the whole approach.
Last Updated on Tuesday, 31 March 2009 14:04
USDA funding for research on biorefininng of whole grains
The Center received a USDA NRI grant ($750,000) to refine whole grain components to functional ingredients with health benefits. The funded project, titled "Whole Grain Ingredients: Health Benefits of Bioactive Phytonutrients And Dietary Fibers From Cereal Grains, is to develop processes that will result in highly functional whole grain ingredients (WGI) that have excellent sensory characteristics and increased bioavailability of key bioactive phytochemicals, and that deliver significant health benefits. Incorporating these highly functional WGI into refined flour to make products with enhanced health benefits and improved sensory quality and stability represents a whole foods approach. Our specific objectives are (1) to develop processes for production of bioactive WGI, (2) to develop WGI-containing foods with acceptable sensory quality and stability, (3) to phytochemical profiles of WGI and evaluate the efficacy and functionality of bioactive components in WGI and WGI-containing foods, (4) to analyze the cholesterol lowering and antioxidant activities of WGI in animal models, and (5) to evaluate the relevance of the integrated research process/results on stakeholders and training of graduate students/post-doctoral fellows. The outcomes are expected to help our stakeholders gain new knowledge of bioavailability of phytochemicals in grains, and provide solutions to technical problems with manufacture of healthy whole grain foods. This project provides a platform for future scientists (graduate students/post-docs) to cultivate the necessary skills to function in an integrated / multidisciplinary research and education environment involving complex food and health-related issues. Stakeholder involvement facilitates innovative research ideas and recommendations for prioritizing and focusing research efforts for tomorrow’s food scientists and nutritionists in the sectors of government, industry and academia.
Last Updated on Tuesday, 31 March 2009 13:43
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