Glycolaldehyde co-extraction during the reactive extraction of acetic acid with tri-n-octylamine/2-ethyl-1-hexanol from a wood-based pyrolysis oil-derived aqueous phase

2012 ◽  
Vol 95 ◽  
pp. 39-43 ◽  
Author(s):  
Caecilia R. Vitasari ◽  
Geert W. Meindersma ◽  
André B. de Haan
Keyword(s):  
Acetic Acid ◽  
Aqueous Phase ◽  
Reactive Extraction ◽  
Pyrolysis Oil

Recovery of acetic acid from an aqueous pyrolysis oil phase by reactive extraction using tri-n-octylamine

2011 ◽  
Vol 176-177 ◽  
pp. 244-252 ◽  
Author(s):  
C.B. Rasrendra ◽  
B. Girisuta ◽  
H.H. van de Bovenkamp ◽  
J.G.M. Winkelman ◽  
E.J. Leijenhorst ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Reactive Extraction ◽  
Pyrolysis Oil

scholarly journals Understanding the effect of co-reactants on ketonization of carboxylic acids in the aqueous-phase pyrolysis oil of wood

2021 ◽  
Author(s):  
Il-Ho Choi ◽  
Hye-Jin Lee ◽  
Kyung-Ran Hwang
Keyword(s):  
Acetic Acid ◽  
Catalytic Activity ◽  
Carboxylic Acid ◽  
Carboxylic Acids ◽  
Aqueous Phase ◽  
Active Sites ◽  
Mixed Solution ◽  
Pyrolysis Oil ◽  
Mixed Solutions ◽  
Reactive Compound

AbstractKetonization of carboxylic acids is one of the crucial reactions to produce sustainable bio-fuel and bio-chemicals from the pyrolysis oil of wood. Ketonization using different mixed solutions of carboxylic acids, furfural, and hydroxyacetone has been explored to understand the influence of co-feed reactants on the performance of ketonization of carboxylic acid over the selected CeZrOx catalyst. Furfural (7% in water) inhibited the catalytic activity for ketonization of acetic acid (20% solution) with reversible blocking of active sites, but for a mixed solution of hydroxyacetone (7%) and acetic acid (20%), both reactants influenced each other, resulting in very low conversions and slow and uncompleted recovery to 50% after removing hydroacetone from the mixture. For the mixed solution (20% acetic acid + 7% furfural + 7% hydroxyacetone in water), hydroxyacetone was the most reactive compound on CeZrOx and the conversions of reactants reached below 10%, due to the inhibition of co-existing carbonyl components. This work provides guidance for ketonization of carboxylic acids in the aqueous-phase pyrolysis oil.

EUROPIUM OXALATE ION ASSOCIATION IN WATER

1966 ◽  
Vol 44 (24) ◽  
pp. 3057-3062 ◽  
Author(s):  
P. G. Manning
Keyword(s):  
Acetic Acid ◽  
Ionic Strength ◽  
Stability Constant ◽  
Stability Constants ◽  
Aqueous Phase ◽  
Sodium Acetate ◽  
Ion Association ◽  
Sodium Oxalate ◽  
Aqueous Sodium ◽  
Oxalate Ion

The partitioning of radiotracer 152/151Eu between aqueous sodium oxalate (Na2L) solutions and toluene solutions of thenoyltrifluoroacetone (HTTA) has been studied as a function of the oxalate concentration. The pH of the aqueous phase was controlled by means of sodium acetate – acetic acid mixtures and the ionic strength (I) by NaCl or NaClO4.At low ionic strengths (~0.05) and [L] ~10−4 M EuL+ formed, but at I = 0.95 and [L] ~10−3 M EuL2− also formed. Stability constants for the 1:1 and 1:2 (metal:ligand) complexes are reported.The magnitudes of the stepwise stability constant ratios are discussed.

Recovery of Liquid Fuel from the Aqueous Phase of Pyrolysis Oil Using Catalytic Conversion

2014 ◽  
Vol 28 (5) ◽  
pp. 3074-3085 ◽  
Author(s):  
Faisal Abnisa ◽  
W. M. A. Wan Daud ◽  
Arash Arami-Niya ◽  
Brahim Si Ali ◽  
J. N. Sahu
Keyword(s):  
Aqueous Phase ◽  
Liquid Fuel ◽  
Catalytic Conversion ◽  
Pyrolysis Oil

Comparative Salmonella Spp. and Listeria monocytogenes Inactivation Rates in Four Commercial Mayonnaise Products

1991 ◽  
Vol 54 (12) ◽  
pp. 913-916 ◽  
Author(s):  
JOHN P. ERICKSON ◽  
PHYLLIS JENKINS
Keyword(s):  
Acetic Acid ◽  
Listeria Monocytogenes ◽  
Aqueous Phase ◽  
Population Declines ◽  
Salmonella Spp ◽  
Egg White Lysozyme ◽  
Consumer Safety ◽  
Safety Risks ◽  
Broad Cross Section ◽  
Formula Composition

Salmonella spp. and Listeria monocytogenes strains were inoculated into four commercial mayonnaise products: sandwich spread, real mayonnaise, reduced calorie mayonnaise dressing, and cholesterol-free reduced calorie mayonnaise dressing. Products represented a broad cross-section of aqueous phase acetic acid, salt, sucrose, and other compositional factors. Results showed that Salmonella spp. inactivation rates were unaffected by formula composition. The organism was rapidly inactivated, decreasing ≥8 log10 CFU/g in ≤72 h, in each of the four products. L. monocytogenes inactivation rates were directly correlated with aqueous phase acetic acid concentrations as follows: sandwich spread ≥ real mayonnaise > cholesterol-free reduced calorie mayonnaise dressing > reduced calorie mayonnaise dressing. L. monocytogenes inactivation rate in sandwich spread and real mayonnaise was similar to Salmonella spp. The reduced calorie mayonnaise dressings showed gradual, incremental population declines. L. monocytogenes decreased 3 and 5 log10 CFU/g in 72 h in reduced calorie and cholesterol-free reduced calorie mayonnaise dressings, respectively. The higher anti-listerial activity in the cholesterol free formulation was attributed to egg white lysozyme. This study documented that commercial mayonnaise, including reduced calorie mayonnaise dressing varieties, represent negligible consumer safety risks.

Ru decorated carbon nanotubes – a promising catalyst for reforming bio-based acetic acid in the aqueous phase

2014 ◽  
Vol 16 (2) ◽  
pp. 864 ◽  
Author(s):  
D. J. M. de Vlieger ◽  
L. Lefferts ◽  
K. Seshan
Keyword(s):  
Carbon Nanotubes ◽  
Acetic Acid ◽  
Aqueous Phase

scholarly journals STEAM REFORMING OF UPGRADED BIO-OIL AQUEOUS PHASE FRACTION FROM SUNFLOWER SEED HULLS: THERMODYNAMIC ANALYSIS

2019 ◽  
Vol 49 (4) ◽  
pp. 297-302
Author(s):  
Yanina P. Maidana ◽  
Eduardo Izurieta ◽  
Andres I. Casoni ◽  
Maria A. Volpe ◽  
Eduardo Lopez ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Aqueous Phase ◽  
Thermodynamic Analysis ◽  
Steam Reforming ◽  
Sunflower Seed ◽  
Maximum Yield ◽  
Energetic Efficiency ◽  
Water Addition ◽  
Thermal Requirements ◽  
Bio Oil

This work focuses on the study of hydrogen production process departing from waste lignocellulosic biomass. The bio-oil was first obtained by non-catalytic fast pyrolysis of sunflower seed hulls. Subsequently, it was upgraded to reduce the concentration of higher molecular weight compounds by water addition and mixing. A 1/1 bio-oil:water ratio was selected here. Later, a thermodynamic analysis based on free energy minimization was profited to study the steam reforming process of the upgraded bio-oil sample. The influence of the operation temperature on the reforming was analyzed. The highest hydrogen yields were obtained at ~740°C. A comparison with acetic acid used as model compound of the bio-oil is included. Results show that acetic acid is not a good approximation of a real aqueous phase of upgraded bio oil fraction. The study concludes with an analysis on the energetic efficiency, showing that its maximum is presented at lower temperatures than the maximum yield, due to the thermal requirements of preheating.

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