Entity

Time filter

Source Type

Fort Collins, MI, United States

Orjuela A.,Michigan State University | Orjuela A.,National University of Colombia | Yanez A.J.,Michigan State University | Vu D.T.,MBI International | And 3 more authors.
Fluid Phase Equilibria | Year: 2010

Liquid-liquid equilibrium data for the ternary system water-ethanol-diethyl succinate were measured at 303.15 K and 313.15 K and atmospheric pressure. The reliability of the LLE data was confirmed using the Othmer-Tobias correlation. P-x data for the vapor-liquid equilibrium for the binary system ethanol-diethyl succinate at 323.15 K and ethanol + water at 101.3 kPa were also measured. Data were fitted using the modified UNIQUAC and NRTL equations for the liquid phase and the Hayden-O'Connell (HOC) equation for the vapor phase. The models agree reasonably well with the experimental data and can predict reported azeotropic conditions. The NRTL-HOC is capable of fitting the LLE data better than the UNIQUAC-HOC. © 2009 Elsevier B.V. All rights reserved. Source


Orjuela A.,Michigan State University | Orjuela A.,National University of Colombia | Yanez A.J.,Michigan State University | Rossman P.K.,Michigan State University | And 4 more authors.
Fluid Phase Equilibria | Year: 2010

Liquid-liquid equilibrium data were measured for the ternary systems water + ethyl acetate + diethyl succinate and water + acetic acid + diethyl succinate at 298.15 K and atmospheric pressure. The reliability of the experimental data was confirmed using the Othmer-Tobias correlation. Vapor-liquid equilibrium data were also measured for the binary systems ethyl acetate + diethyl succinate at 313.15 K, acetic acid + diethyl succinate at 323.15 K and ethyl acetate + ethanol at 101.325 kPa. Binary parameters for the modified UNIQUAC and NRTL equations were obtained by fitting experimental and reported data using the regression tool in Aspen Plus®. The Hayden-O'Connell equation was used to represent interactions in the vapor phase. The models agree reasonably well with the experimental data and can predict reported azeotropic conditions. © 2009 Elsevier B.V. All rights reserved. Source


Patent
Mbi International | Date: 2012-04-27

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.


Hoover A.N.,Idaho National Laboratory | Tumuluru J.S.,Idaho National Laboratory | Teymouri F.,MBI International | Moore J.,MBI International | Gresham G.,Idaho National Laboratory
Bioresource Technology | Year: 2014

Pelletization process variables, including grind size (4, 6. mm), die speed (40, 50, 60. Hz), and preheating (none, 70. °C), were evaluated to understand their effect on pellet quality attributes and sugar yields of ammonia fiber expansion (AFEX) pretreated biomass. The bulk density of the pelletized AFEX corn stover was three to six times greater compared to untreated and AFEX-treated corn stover. Also, the durability of the pelletized AFEX corn stover was. >97.5% for all pelletization conditions studied except for preheated pellets. Die speed had no effect on enzymatic hydrolysis sugar yields of pellets. Pellets produced with preheating or a larger grind size (6. mm) had similar or lower sugar yields. Pellets generated with 4. mm AFEX-treated corn stover, a 60. Hz die speed, and no preheating resulted in pellets with similar or greater density, durability, and sugar yields compared to other pelletization conditions. © 2014 The Authors. Source


Bals B.D.,Michigan State University | Teymouri F.,MBI International | Campbell T.,MBI International | Jin M.,Michigan State University | Dale B.E.,Michigan State University
Bioenergy Research | Year: 2012

Low temperature and long residence time pretreatments have been proposed as an alternative to conventional pretreatments within a centralized biorefinery, allowing for a decentralized pretreatment without high energy costs. Ammonia fiber expansion (AFEX™) pretreatment may be uniquely suitable for decentralized pretreatment, and this study considers the possibility of decreasing the temperature in AFEX pretreatment of corn stover. AFEX pretreatment at 40°C and 8 h produced comparable sugar and ethanol yields as conventional AFEX pretreatment at high temperatures and short residence time during subsequent hydrolysis and fermentation. Increasing the ammonia loading at these temperatures tends to increase digestibility, although the moisture content of the reaction has little effect. This study suggests a greater flexibility in AFEX pretreatment conditions than previously thought, allowing for an alternative approach for decentralized facilities if the economic conditions are appropriate. © 2011 Springer Science+Business Media, LLC. Source

Discover hidden collaborations