@article {48491, title = {Wadsworth-emmons reaction by using the fluorapatite catalyst: kinetic studies}, journal = {Industrial \& Engineering Chemistry Research}, volume = {62}, year = {2023}, month = {MAY }, pages = {7901-7911}, type = {Article}, abstract = {

Wadsworth-Emmons reaction was successfully carriedout byusing the fluorapatite (FAP) catalyst. The reaction of 2-methoxybenzaldehydeand triethylphosphonoacetate using FAP afforded \& alpha;,\& beta;-unsaturatedester with 100\% conversion and 80\% selectivity. A kinetic model wasvalidated at different temperatures by Langmuir-Hinshelwood-Hougen-Watson(LHHW), and the absence of mass transfer resistance was verified bythe Weisz Prater criterion. The effect of different catalysts, temperature,catalyst loading, solvent, mole ratio, and speed of stirring was studied.The FAP catalyst was characterized by Fourier transform infrared spectroscopy,Brunauer-Emmett-Teller method, nitrogen adsorption-desorption,transmission electron microscopy, energy-dispersive X-ray spectroscopy,temperature programmed desorption (TPD-NH3), X-ray diffraction,and X-ray photoelectron spectroscopy. The FAP catalyst was found tobe stable up to three recycles with no loss in activity.

}, issn = {0888-5885}, doi = {10.1021/acs.iecr.3c00407}, author = {Vishwakarma, Rakhi and Vinod, Chathakudath P. and Rathod, Virendra and Kantam, Mannepalli Lakshmi} } @article {49050, title = {Kinetic model of hydrogenation of glucose to sorbitol on a Ni/Bentonite catalyst}, journal = {Industrial and Engineering Chemistry Research}, volume = {63}, year = {2024}, month = {MAR }, pages = {4771-4781}, type = {Article}, abstract = {

In the present work, we studied the hydrogenation of glucose to sorbitol using a nickel/bentonite catalyst. The Ni/bentonite catalyst was prepared by the wet impregnation method and characterized by different methods to understand the catalyst surface morphology, surface area, metal content, pore size, etc. Different reaction parameters such as temperature, hydrogen pressure, metal loading, catalyst loading, and agitation speed were studied to achieve a glucose conversion of 96.8\% and a sorbitol selectivity of 95.3\%. The reusability test was performed to examine the stability of the catalyst. The kinetic models such as the Eley-Rideal and Langmuir-Hinshelwood-Hougen-Watson models were used to study the hydrogenation of glucose and activation energy required for the reaction.

}, issn = {0888-5885}, doi = {10.1021/acs.iecr.3c03808}, author = {Pandya, Harmitkumar and Vinod, Chathakudath Prabhakaran and Rathod, Virendra and Kantam, Mannepalli Lakshmi} } @article {49696, title = {Synthesis of glycolic acid from glyoxal by using hydrotalcite catalyst and kinetic studies}, journal = {ChemCatChem}, volume = {17}, year = {2025}, month = {JUN}, type = {Article}, abstract = {

In this work, Mg-Al hydrotalcite catalysts with different molar ratios were prepared using the co-precipitation method for the synthesis of glycolic acid (GA) from glyoxal. Various reaction parameters such as catalyst molar ratio, time, temperature, catalyst loading, and catalyst poisoning were studied and optimized for better conversion of glyoxal selectively to glycolic acid. Hydrotalcite catalyst with a 2:1 molar ratio of Mg: Al gives 98\% conversion of glyoxal with 96\% selectivity of glycolic acid at 100 degrees C temperature, 40\% catalyst loading, and water as solvent in 8 h. Different characterization methods were used such as XRD, XPS, SEM-EDX, nitrogen adsorption desorption, and CO2-TPD for hydrotalcite catalyst. A kinetic study was also performed to observe the reaction order and activation energy required for the reaction.

}, keywords = {Glycolic acid, Glyoxal, hydrotalcite, kinetics}, issn = {1867-3880}, doi = {10.1002/cctc.202500321}, author = {Pandya, Harmitkumar N. and Kamble, Paresh A. and Vinod, Chathakudath P. and Rathod, Virendra and Kantam, Mannepalli Lakshmi} }