National Chemical Laboratory

About: National Chemical Laboratory is a facility organization based out in Pune, Maharashtra, India. It is known for research contribution in the topics: Catalysis & Nanoparticle. The organization has 8891 authors who have published 14837 publications receiving 387600 citations.

Kinetics of hydroformylation of l-dodecene using homogeneous HRh(CO) (PPh3)3 catalyst

Abstract: The kinetics of the HRh(CO(PPh 3 ) 3 catalyzed hydroformylation of l-dodecene has been investigated in a temperature range of 323–343, K. The effect of l-dodecene and catalyst concentration, P H and P CO , on the rate of reaction has been studied. The rate was found to be first order with respect to catalyst concentration and partial pressure of hydrogen. The rate vs. P CO shows a typical case of substrate inhibited kinetics. The rate was found to be first order with respect to l-dodecene in the lower concentration range while at higher concentrations a zero order dependence was observed. A rate equation has been proposed and kinetic parameters evaluated. The activation energy was found to be 57.12 kJ/mol. A batch reactor model has been a used to predict the concentration-time profiles which were found to agree well with the experimental data at different temperatures. This indicates the applicability of the rate model over a wide range of conditions.

A new porous material to enhance the kinetics of clathrate process: application to precombustion carbon dioxide capture.

Abstract: In this work, the performance of a new porous medium, polyurethane (PU) foam in a fixed bed reactor for carbon dioxide separation from fuel gas mixture using the hydrate based gas separation process is evaluated The kinetics of hydrate formation in the presence of 25 mol % propane as thermodynamic promoter was investigated at 45, 55, and 60 MPa and 2742 K Significantly higher gas consumption and water conversion to hydrate was achieved when PU foam was employed PU foam as a porous medium can help convert 54% of water to hydrate in two hours of hydrate formation In addition the induction times were very low (<367 min at 60 MPa) A normalized rate of hydrate formation of 6448 (±382) molmin–1m–3 was obtained at 60 MPa and 2742 K Based on a morphological study, the mechanism of hydrate formation from water dispersed in interstitial pore space of the porous medium is presented Finally, we propose a four step operation of the hydrate based gas separation process to scale up