Please use this identifier to cite or link to this item: http://hdl.handle.net/11189/5366
Title: Kinetic modelling for bio-methane generation during anaerobic digestion of municipal sewage sludge utilising acti-zyme (Bio-catalyst) as a resource recovery strategy
Authors: Manyuchi, MM 
Ikhu-Omoregbe, DIO 
Oyekola, OO 
Zvarevashe, W 
Mutusva, TN 
Keywords: α-amino phosphonates;Succinic acid;Kinetics;Mechanism
Issue Date: 2016
Publisher: Journal of Applied Chemical Science International
Source: Journal of Applied Chemical Science International, 2395-3713 (Online), Vol.: 5, 4 Issue.: 1
Abstract: A developed method for the synthesis of α-amino phosphonates from a condensation reaction of trialkyl phosphite, aldehydes and amine has been reported in the presence of succinic acid as a catalyst under solvent-free conditions. Excellent yields, short reaction time, mild reaction conditions, higher availability, lower costs, more environmentally friendly, lack of need for column chromatography and simple work-up procedure were the advantages of this new protocol. The reaction was monitored spectrally and followed the second order kinetics. Moreover, the effect of solvent, concentration, and different alkyl groups within the trialkyl phosphite (structural effect) on the rate of the reactions was investigated. The first step of the mechanism was determined as a rate determining step (RDS) and the rate constant (Lnk1, Lnk1/T) depended on reciprocal temperature was in good consistent with Arrhenius and Eyring equations. The activation energy (Ea) and parameters (ΔG‡, ΔS‡ and ΔH‡) of the reaction were calculated from the obtained experimental data.
URI: http://hdl.handle.net/11189/5366
ISSN: 2395-3705
Appears in Collections:Eng - Journal articles (DHET subsidised)

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