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East Lansing, MI, United States

Williams D.L.,Michigan State University | Wynn J.,Michigan Biotechnology Institute | Liu T.,Michigan State University | Hodge D.,Michigan State University
10AIChE - 2010 AIChE Annual Meeting, Conference Proceedings | Year: 2010

This work will investigate the feasibility of biomass pretreatment with alkaline hydrogen peroxide (AHP) in a cellulosic ethanol process with the ultimate goal of optimizing the utilization of input chemicals for an industrially relevant process for the pretreatment of herbaceous plants. For economic feasibility, pretreatment must be done at higher solids loadings; therefore, input chemical utilization must be optimized by determining the consumption of alkali and hydrogen peroxide at high solids concentrations. An understanding of the relationship between NaOH: H2O2: Biomass and enzymatic digestibility will be developed to determine if economically feasible conditions for AHP can be identified. Using these conditions, an economic analysis of a cellulosic ethanol plant utilizing 1000 ton/day of switchgrass pretreated by AHP will be performed based on the experimentally-determined biomass digestibilities and inorganic chemical consumptions. Source

Michigan Biotechnology Institute | Date: 2013-04-24

this invention is directed to a process for treating biomass. The biomass is treated with a biomass swelling agent within the vessel to swell or rupture at least a portion of the biomass. A portion of the swelling agent is removed from a first end of the vessel following the treatment. Then steam is introduced into a second end of the vessel different from the first end to further remove swelling agent from the vessel in such a manner that the swelling agent exits the vessel at a relatively low water content.

Michigan Biotechnology Institute | Date: 2011-03-03

This invention provide processes for producing carboxylic acid product, along with useful salts. The carboxylic acid product that is produced according to this invention is preferably a C

Michigan Biotechnology Institute | Date: 2011-12-16

Disclosed are recombinant microorganisms for producing organic acids. The recombinant microorganisms express a polypeptide that has the enzymatic activity of an enzyme that is utilized in the pentose phosphate cycle. The recombinant microorganism may include recombinant

Bonner I.J.,Idaho National Laboratory | Thompson D.N.,Idaho National Laboratory | Teymouri F.,Michigan Biotechnology Institute | Campbell T.,Michigan Biotechnology Institute | And 2 more authors.
Drying Technology | Year: 2015

Combining ammonia fiber expansion (AFEX™) pretreatment with a depot processing facility is a promising option for delivering high-value densified biomass to the emerging bioenergy industry. However, because the pretreatment process results in a high moisture material unsuitable for pelleting or storage (40% wet basis), the biomass must be immediately dried. If AFEX pretreatment results in a material that is difficult to dry, the economics of this already costly operation would be at risk. This work tests the nature of moisture sorption isotherms and thin-layer drying behavior of corn (Zea mays L.) stover at 20°C to 60°C before and after sequential AFEX pretreatment and pelletization to determine whether any negative impacts to material drying or storage may result from the AFEX process. The equilibrium moisture content to equilibrium relative humidity relationship for each of the materials was determined using dynamic vapor sorption isotherms and modeled with modified Chung-Pfost, modified Halsey, and modified Henderson temperature-dependent models as well as the Double Log Polynomial (DLP), Peleg, and Guggenheim Anderson de Boer (GAB) temperature-independent models. Drying kinetics were quantified under thin-layer laboratory testing and modeled using the Modified Page's equation. Water activity isotherms for non-pelleted biomass were best modeled with the Peleg temperature-independent equation while isotherms for the pelleted biomass were best modeled with the Double Log Polynomial equation. Thin-layer drying results were accurately modeled with the Modified Page's equation. The results of this work indicate that AFEX pretreatment results in drying properties more favorable than or equal to that of raw corn stover, and pellets of superior physical stability in storage. © 2015, This article not subject to United States copyright law. Source

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