Shaharun, M.S. and Mukhtar, H. and Yusup, S. and Dutta, B.K. (2008) Kinetics of hydroformylation of higher olefins using rhodiumphosphite catalyst in a thermomorphic solvent system. In: UNSPECIFIED.
Full text not available from this repository.Abstract
The liquid-liquid biphasic thermomorphic or temperature dependent multicomponent solvent (TMS) is an attractive alternative to the conventional single or biphasic reaction media system. In such a solvent, the catalyst remains as a residue in one of the liquid phases and the product goes preferably to the other liquid phase providing ease of product separation and catalyst recovery. This paper describes the kinetics of hydroformylation of two higher olefins (1-octene and 1-dodecene) using a homogeneous catalyst consisting of HRh(PPh3)3(CO) and P(OPh)3 in a TMS- system containing propylene carbonate (PC), dodecane and 1,4-dioxane. The effect of concentration of the olefins, catalyst loading, partial pressure of CO and H2 and temperature on the rate of reaction has been studied at temperature of 353, 363 and 373 K. The rate was found to be first order with respect to catalyst, 1-octene and partial pressure of H3. The rate vs. PCO shows a typical case of substrate inhibited kinetics. Three generalized rate models were developed on the basis of plausible reaction pathways. The kinetic and equilibrium parameters of the models were estimated by nonlinear least square regression of experimental data. Conventional model discrimination techniques were used to identify the correct one. The rate model with H3-addition as the controlling step was found to represent the rate data. The rate model predicted the conversion of the two alkenes satisfactorily with an average absolute error of ±4.0 .
Item Type: | Conference or Workshop Item (UNSPECIFIED) |
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Additional Information: | cited By 1; Conference of 2008 AIChE Annual Meeting, AIChE 100 ; Conference Date: 16 November 2008 Through 21 November 2008; Conference Code:83913 |
Uncontrolled Keywords: | 1-Dodecene; 1-octene; Average absolute error; Biphasic; Biphasic reaction; Catalyst loadings; Catalyst recovery; Conventional models; Dodecane; Equilibrium parameters; Experimental data; First order; Higher olefins; Homogeneous catalyst; Hydroformylation of higher olefins; Liquid Phase; Liquid phasis; Liquid-liquids; Multi-component solvents; Non-linear least squares; Product separation; Propylene carbonate; Rate models; Rate of reaction; Reaction pathways; Rhodium catalyst; Temperature dependent; Thermomorphic solvent systems, Ethers; Hydroformylation; Hydroxylation; Liquids; Pressure effects; Propylene; Reaction kinetics; Rhodium; Solvents, Catalysts |
Depositing User: | Mr Ahmad Suhairi UTP |
Date Deposited: | 09 Nov 2023 15:15 |
Last Modified: | 09 Nov 2023 15:15 |
URI: | https://khub.utp.edu.my/scholars/id/eprint/362 |