4 Mass transfer (diffusion) limitation Formation of three different phases with oil, alcohol and water (i) Use of co solvents such as n-hexane, dimethylsulphoxide (DMSO), tetrahydrofuran (ii) Use of catalyst support with more specific surface area and interconnected system of larger pore sizes...
One way of overcoming mass transfer problem in heterogeneous catalysts is using certain amount of co-solvent to promote miscibility of oil and methanol and accordingly accelerate the reaction rate. Tetrahydrofuran (THF), dimethyl sulfoxide (DMSO), n-hexane and ethanol were used more frequently as ...
The amorphous TiO2 (a-TiO2) used in their study was synthesized using 1.4 g of titanium tetraisopropoxide (TTIP) which was mixed with 30 g of organic solvent (1-butanol (BtOH), diethyl ether (Et2O), hexane (Hex), ethanol (EtOH), acetone (Ace), isopropanol (IPA), and tetrahydrofuran ...
This work reports experimental data of polycaprolactone (PCL) polymer solubility in chloroform as solvent and n-hexane, methanol, ethanol and isopropanol as nonsolvents, at atmospheric pressure (about 1,0 bar) and temperature of 303.15 K. It was used PCL with...
The thermochemical equation for the combustion of hexane is shown below. C6H14(g) + 19/2 O2(g) \rightarrow 6 CO2(g) + 7 H2O(g) ΔH = -4163 kJ What is the enthalpy change for the combustion of 2.50 g C6H14? - -1.43 x 10^5 kJ - -1.04 x 10^4 ...
Next, 5 g of KIT-6 was dispersed in 200 ml of n-hexane. After stirring at room temperature for 3 h, 5 ml of the Mn/K solution was added slowly with stirring. The mixture was stirred overnight, filtered and dried at room temperature until a completely dried powder was obtained. The ...
M. Misono et al., “Hydroisomerization of n-hexane and n-heptane over platinum-promoted Cs2.5 H0.5 PW12O40 (Cs2.5) studied in comparison with several other solid acids”, Topics in Catalysis 11/12, (2000), pp. 239-246. H. van Bekkum et al., “Thermoporometry as a new tool in ...
Due to compatibility issues with the gas chromatograph, the microdroplet was drawn back into the syringe and transferred to a micro vial containing 10 µL of n-hexane and 10 µL of water. The mixture was shaken for 3 min to back-extract the analytes into the n-hexane layer, and 2 ...
The solvents used for separation of the fractions were n-hexane for the aliphatic fraction, n-hexane/toluene (60/40) for the aromatic fraction, and toluene/methanol (60/40) for the heterocomponents (NSO). 2.4. TOC and Rock-Eval pyrolysis Total organic carbon (TOC) and Rock-Eval pyrolysis...
cyclohexane, xylene, n-hexane, n-heptane, isooctane and the like. In general this diluent is a paraffin, cycloparaffin or aromatic which contains from four to 10 carbon atoms per molecule. Relatively small amounts of other materials can be present, such as ethers in which the initiator was ...