scholarly journals Measurement and Modeling of Phase Equilibria in Systems Containing Water, Xylose, Furfural, and Acetic Acid

2021 ◽  
Author(s):  
Nadia Galeotti ◽  
Jakob Burger ◽  
Hans Hasse
Keyword(s):  
Experimental Data ◽  
Acetic Acid ◽  
Ternary System ◽  
Phase Equilibria ◽  
Solubility Limit ◽  
Miscibility Gap ◽  
Rich Phase ◽  
Biotechnological Processes ◽  
Solid Liquid ◽  
System Water

Wood hydrolysates obtained in biotechnological processes are typically aqueous solutions that contain, among others, sugars, acetic acid, and furfural. Only little is known on the influence of the sugars on the phase equilibria in those mixtures. Therefore liquid-liquid equilibria (LLE), solid-liquid equilibria (SLE), and solid-liquid-liquid equilibria (SLLE) in the system (water(W) + xylose (X) + furfural (F)) were studied in the present work at 298.15 K and 333.15 K. Additionally, the LLE in the system (W + X + F + acetic acid (AA)) was studied at 298.15 K. The results show that, up to the solubility limit of xylose, adding xylose to mixtures of (W +F) hardly influences the width of the miscibility gap, and that there is practically no xylose in the furfural-rich phase. However, the miscibility gap in the ternary system (W + F + AA) is slightly widened by the addition of xylose. The experimental data on the phase equilibria from the present work were described using the NRTL model. The model describes the experimental data well.

Phase Equilibria of the Ternary System Water + Acetic Acid + 1-Pentanol

1996 ◽  
Vol 41 (3) ◽  
pp. 562-565 ◽  
Author(s):  
Mohamed A. Fahim ◽  
Shaheen A. Al-Muhtaseb ◽  
Inas M. Al-Nashef
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Phase Equilibria ◽  
System Water

Phase equilibria of the ternary system water/acetic acid/2-pentanol

1996 ◽  
Vol 123 (1-2) ◽  
pp. 189-203 ◽  
Author(s):  
Shaheen A. Al-Muhtaseb ◽  
Mohamed A. Fahim
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Phase Equilibria ◽  
System Water

Liquid−Liquid Equilibria of the Ternary System Water + Acetic Acid + 1-Heptanol

2000 ◽  
Vol 45 (2) ◽  
pp. 301-303 ◽  
Author(s):  
Adel S. Aljimaz ◽  
Mohamed S. H. Fandary ◽  
Jasem A. Alkandary ◽  
Mohamed A. Fahim
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
System Water

Liquid–liquid equilibrium of the ternary system water+acetic acid+sec-butyl acetate

2010 ◽  
Vol 293 (1) ◽  
pp. 73-78 ◽  
Author(s):  
Song Hu ◽  
Qing-lin Chen ◽  
Bing-jian Zhang ◽  
Yuan-lan Liang ◽  
Xue-nong Gao
Keyword(s):  
Acetic Acid ◽  
Ternary System ◽  
Butyl Acetate ◽  
Liquid Equilibrium ◽  
System Water

Phase Equilibria in the Ternary System Hexacosane + Dibenzofuran + Biphenyl: Experimental Data and Prediction with DISQUAC Model

2014 ◽  
Vol 59 (6) ◽  
pp. 1991-1997 ◽  
Author(s):  
Abdelaziz Chikh Baelhadj ◽  
Omar Dahmani ◽  
Rachid Mahmoud ◽  
Fabrice Mutelet ◽  
Mohammed Bouroukba ◽  
...  
Keyword(s):  
Experimental Data ◽  
Ternary System ◽  
Phase Equilibria ◽  
Disquac Model

Solid–liquid phase equilibria in the aqueous ternary system Li2SO4+LiBO2+H2O at T=288.15 and 298.15K

2014 ◽  
Vol 371 ◽  
pp. 121-124 ◽  
Author(s):  
D.L. Gao ◽  
Q. Wang ◽  
Y.F. Guo ◽  
X.P. Yu ◽  
S.Q. Wang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Ternary System ◽  
Phase Equilibria ◽  
Solid Liquid

Solid–Liquid Phase Equilibria of Ternary System KBr–LiBr–H2O at 273 and 308 K

2019 ◽  
Vol 64 (12) ◽  
pp. 5288-5294 ◽  
Author(s):  
Chao Ye ◽  
Zhong-Zhong Wu ◽  
Shi-Hua Sang ◽  
Xiao-Yun Qi ◽  
Xing Liu
Keyword(s):  
Liquid Phase ◽  
Ternary System ◽  
Phase Equilibria ◽  
Solid Liquid

Incomplete Solubility in Nitride Alloys

1996 ◽  
Vol 449 ◽  
Author(s):  
I. H. Ho ◽  
G.B. Stringfellow
Keyword(s):  
Experimental Data ◽  
Nearest Neighbor ◽  
Solubility Limit ◽  
Lattice Parameter ◽  
Miscibility Gap ◽  
Recent Experimental Data ◽  
Virtual Crystal Approximation ◽  
Group V ◽  
Group Iii ◽  
Nitride Alloys

ABSTRACTA model based on the valence-force-field (VFF) model has been developed specifically for the calculation of the irascibility gaps in III-V nitride alloys. In the dilute limit, this model allows the relaxation of the atoms on both sublattices. It was found that the energy due to bond stretching and bond bending was lowered and the solubility limit was increased substantially when both sublattices were allowed to relax to distances as large as the sixth nearest neighbor positions. Using this model, the equilibrium mole fraction of N in GaP was calculated to be 6×l0−7 at 700°C. This is slightly higher than the calculated results from the semi-empirical delta lattice parameter (DLP) model. Both the temperature dependence and the absolute values of the calculated solubility agree closely with the experimental data. The solubility is more than three orders of magnitude larger than the result obtained using the VFF model with the group V atom positions given by the virtual crystal approximation, i.e., with relaxation of only the first neighbor bonds. Other nitride systems, such as GaAsN, AlPN, AlAsN, InPN, and InAsN were investigated as well. The equilibrium mole fractions of nitrogen in InP and InAs are the highest, which agrees well with recent experimental data where high N concentrations have been produced in InAsN alloys. Calculations were also performed for the alloy systems with mixing on the group III sublattice that are so important for device applications. Allowing relaxation to the 3rd nearest neighbor gives an In solubility in GaN at 800°C of less than 6%. Again, this is in agreement with the results of the DLP model calculation. This result may partially explain the difficulties experienced with the growth of these alloys. Indeed, evidence of solid immiscibility has recently been reported. A significant miscibility gap was also calculated for the AlInN system, but the AlGaN system is completely miscible.

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