Open Access. Powered by Scholars. Published by Universities.®

Biomedical Engineering and Bioengineering Commons

Open Access. Powered by Scholars. Published by Universities.®

Chemical and Biological Engineering Publications

Center for Sustainable Environmental Technologies

Articles 1 - 4 of 4

Full-Text Articles in Biomedical Engineering and Bioengineering

The Influence Of Alkali And Alkaline Earth Metals And The Role Of Acid Pretreatments In Production Of Sugars From Switchgrass Based On Solvent Liquefaction, Xianglan Bai, Robert C. Brown, Jie Fu, Brent H. Shanks, Matthew Kieffer Jan 2014

The Influence Of Alkali And Alkaline Earth Metals And The Role Of Acid Pretreatments In Production Of Sugars From Switchgrass Based On Solvent Liquefaction, Xianglan Bai, Robert C. Brown, Jie Fu, Brent H. Shanks, Matthew Kieffer

Chemical and Biological Engineering Publications

This study investigated the influence of alkali and alkaline earth metals (AAEM) and the role of acid pretreatments in the production of sugars during solvent liquefaction of lignocellulosic biomass using 1,4-dioxane and water as solvents. The present study found that removal of AAEM by acid washing/water rinsing did not enhance sugar production during solvent liquefaction of pretreated switchgrass nearly to the extent observed for fast pyrolysis nor did it inhibit lignin decomposition, suggesting that AAEM play less of a role in determining product yields in solvent liquefaction. On the other hand, acid infusion greatly enhanced the yields of ...


Application Of A Combined Catalyst And Sorbent For Steam Reforming Of Methane, Karl O. Albrecht, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock Jan 2010

Application Of A Combined Catalyst And Sorbent For Steam Reforming Of Methane, Karl O. Albrecht, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock

Chemical and Biological Engineering Publications

The performance of a combined catalyst and sorbent material designed for reforming hydrocarbons was evaluated by reacting methane with steam at different temperatures and pressures in a reactor packed with the material. The combined material was in the form of small spherical pellets comprised of a sorbent core of lime encased in a porous shell made largely of sintered alumina that supported a nickel catalyst. On the basis of previous research, two shell formulations were included in the study. One shell formulation contained a small quantity of CaO for strengthening of the shells, whereas the other contained a similar quantity ...


Development Of A Cao-Based Co2 Sorbent With Improved Cyclic Stability, Karl O. Albrecht, Kyle S. Wagenbach, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock Jan 2008

Development Of A Cao-Based Co2 Sorbent With Improved Cyclic Stability, Karl O. Albrecht, Kyle S. Wagenbach, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock

Chemical and Biological Engineering Publications

The carbonation of CaO is an attractive method for removing CO2 from hot gas mixtures. However, regeneration and reuse of a CaO-based sorbent causes a gradual decline in absorption capacity, which ultimately limits the life of the material. Various methods have been proposed for increasing the life cycle performance of a CaO-based sorbent. Two of these methods were selected for further investigation. One method incorporates an “inert” material in the sorbent, while a second method stabilizes the sorbent through controlled sintering. Promising results were achieved with both methods when they were applied separately to a sorbent derived from a natural ...


A Combined Catalyst And Sorbent For Enhancing Hydrogen Production From Coal Or Biomass, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock Jan 2007

A Combined Catalyst And Sorbent For Enhancing Hydrogen Production From Coal Or Biomass, Justinus A. Satrio, Brent H. Shanks, Thomas D. Wheelock

Chemical and Biological Engineering Publications

Future large-scale production of H2 for use as a clean fuel will likely depend upon gasifying coal or biomass followed by steam reforming the resulting gas mixture and separating the CO2 byproduct. The process of steam reforming and CO2 separation can be greatly simplified by utilizing a new material that combines a reforming catalyst with a sorbent for CO2. Such a material was prepared in the form of small pellets with cores made of calcium and magnesium oxides and shells made largely of alumina impregnated with a nickel catalyst. Subsequent laboratory performance tests of the material showed that CO, CH4 ...