| Breakthrough behavior of 17.5 mol% water in methanol, ethanol, isopropanol, and t-butanol vapors passed over corn grits. | |
| | |
MedLine Citation:
|
PMID: 18555416 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
|
Ground corn is now used in industry as an adsorbent to remove water from ethanol vapors. It is stable and inexpensive at 10 cents/lb (22 cents/kg). For regeneration it requires less than 2000 Btu/gal of 190 proof ethanol processed. If necessary, it could be readily saccharified and fermented into ethanol after use. This renewable resource has further exciting potential as an inexpensive adsorbent for water removal from other alcohols, including methanol, isopropanol, and t-butanol. Water sorption capacity in a fixed bed, nonisothermal adsorption column appears to be a function of the heat capacity of the non-adsorbed alcohol vapor, relative to the heat capacity of the corn adsorbent. Methanol, ethanol, isopropanol, and t-butanol containing 17.5 mol% water gave 105,151, 284, and 358 g anhydrous product/kg adsorbent, respectively, per adsorption cycle. This adsorbent, having operational temperature ranges between 80 and 100 degrees C, is indicated to be of potential utility in solvent recycle processes using these industrially important alcohols. Observed adsorption characteristics are discussed in terms of the alcohol properties of molecular size, heat capacity, and diffusivity. The adsorption mechanism is hypothesized to include transport of water molecules into the structure of adjacent starch molecules present in small spherical bodies (diameter of several microns) immobilized on the surface of the corn grit particles. |
| | |
Authors:
|
P R Bienkowski; A Barth??; M Voloch; R N Neuman; M R Ladisch |
Related Documents
:
|
17268686 - Slab model studies of water adsorption and decomposition on clean and x- (x = c, n and ... 12049126 - Adsorption of anionic surfactant by a low-cost adsorbent. 21090656 - Implementation of new tpd analysis techniques in the evaluation of second order desorpt... 19697906 - Influence of solvation and the structure of adsorbates on the kinetics and mechanism of... 21152656 - Integrated survey of water pollution in the suquía river basin (córdoba, argentina). 19438276 - Adsorption kinetics and mechanical properties of ultrathin polyelectrolyte multilayers:... |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Biotechnology and bioengineering Volume: 28 ISSN: 0006-3592 ISO Abbreviation: Biotechnol. Bioeng. Publication Date: 1986 Jul |
Date Detail:
|
Created Date: 2008-06-16 Completed Date: 2009-12-16 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 7502021 Medline TA: Biotechnol Bioeng Country: United States |
Other Details:
|
Languages: eng Pagination: 960-4 Citation Subset: - |
Affiliation:
|
Laboratory of Renewable Resources Engineering, Purdue University, West Lafayette, Indiana 47907, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Optimal control of substrate concentrations in bioreactors with separated sensors.
Next Document: Effects of glucose on phenol biodegradation by heterogeneous populations.