scholarly journals Water and methanol adsorption on MOFs for cycling heat transformation processes

2014 ◽  
Vol 38 (5) ◽  
pp. 1846-1852 ◽  
Author(s):  
Felix Jeremias ◽  
Dominik Fröhlich ◽  
Christoph Janiak ◽  
Stefan K. Henninger

MOFs with high water uptake capacity and hydrothermal stability are gaining attention for low temperature heat transformation applications such as thermally driven adsorption chillers or adsorption heat pumps.

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 772
Author(s):  
Estefanía Álvarez-Castillo ◽  
Carlos Bengoechea ◽  
Antonio Guerrero

The replacement of common acrylic derivatives by biodegradable materials in the formulation of superabsorbent materials would lessen the associated environmental impact. Moreover, the use of by-products or biowastes from the food industry that are usually discarded would promote a desired circular economy. The present study deals with the development of superabsorbent materials based on a by-product from the meat industry, namely plasma protein, focusing on the effects of a freeze-drying stage before blending with glycerol and eventual injection molding. More specifically, this freeze-drying stage is carried out either directly on the protein flour or after its solubilization in deionized water (10% w/w). Superabsorbent materials obtained after this solubilization-freeze-drying process display higher Young’s modulus and tensile strength values, without affecting their water uptake capacity. As greater water uptake is commonly related to poorer mechanical properties, the proposed solubilization-freeze-drying process is a useful strategy for producing strengthened hydrophilic materials.


2016 ◽  
Vol 7 (14) ◽  
pp. 2553-2564 ◽  
Author(s):  
Yating Jia ◽  
Weizhong Wang ◽  
Xiaojun Zhou ◽  
Wei Nie ◽  
Liang Chen ◽  
...  

A poly(glycerol sebacate)-based elastomeric copolyesters with improved mechanical properties and higher water uptake capacity.


2019 ◽  
Vol 157 ◽  
pp. 1456-1461
Author(s):  
Alexey N. Vasiliev ◽  
Olga V. Shepovalova ◽  
Evgenia V. Tutunina

2012 ◽  
Vol 170-173 ◽  
pp. 2550-2553 ◽  
Author(s):  
Guang Hui Zhou ◽  
Shi Wei Feng ◽  
Si Qi Cui ◽  
Yin Liu

A heat pump is a kind of energy saving equipment. It can effectively improve the grade of low temperature renewable and waste energy. Because of the increasing demands for higher temperature energy in many industrial processes and other fields, the development and research of high temperature heat pumps have been becoming more and more pressing and significant. This paper briefly summarizes the development status in two aspects: the development of working fluids and system features and characteristics of different cycle types.


2017 ◽  
Vol 19 (38) ◽  
pp. 26132-26144 ◽  
Author(s):  
Akhil Pratap Singh ◽  
Kaushik Kundu ◽  
Vikram Singh ◽  
Ramesh L. Gardas ◽  
Sanjib Senapati

In view of this limited research on pILs in microemulsions, here we study the formation and characterization of a series of pIL–water/oil microemulsions with specific questions on the effect of pILs on water uptake capacity and thermal stability of W/O microemulsions.


Clay Minerals ◽  
2011 ◽  
Vol 46 (3) ◽  
pp. 411-420 ◽  
Author(s):  
S. Kaufhold ◽  
R. Dohrmann ◽  
K. Ufer ◽  
R. Kleeberg ◽  
H. Stanjek

AbstractThe Cu-triethylenetetramine-complex (Cutrien) is one of the commonly used index cations for CEC determination in clay science. Cutrien-exchanged smectites show basal spacings between 13.0 and 13.5 Å after correction for the Lorentz and polarization factors. The full width at half maximum (FWHM) of the d001 reflection is today related to the percentage of tetrahedral charge (beidellitic character) and/or to the Fe content of the smectites. The structural Fe content and the tetrahedral charge correlate, so their individual influence on d001 cannot be resolved. Nevertheless, the FWHM of Cutrien smectites should depend on the charge distribution rather than the Fe content.X-ray diffraction (XRD) and water uptake capacity measurements showed that the interlayer of Cutrien-exchanged smectites does not swell any more, but can take up a few water molecules. Accordingly, the water uptake capacity of the external surface area can be determined independently from the interlayer water uptake capacity. Adjusting the pH of Cutrien-bentonite dispersion to different values allows for the determination of the variable charge.In conclusion, Cutrien exchange of smectites appears to be suitable for the study of external surfaces area related phenomena (e.g. edge adsorption processes) without any influence of the interlayer region.


2015 ◽  
Vol 44 (5) ◽  
pp. 2047-2051 ◽  
Author(s):  
Nakeun Ko ◽  
Jisu Hong ◽  
Siyoung Sung ◽  
Kyle E. Cordova ◽  
Hye Jeong Park ◽  
...  

The functionalization of the metal–organic framework, UiO-67, with –NH2 groups is proven effective for increasing the water uptake capacity at low relative pressure at 298 K.


Sign in / Sign up

Export Citation Format

Share Document