Jump to ContentJump to Main Navigation
Show Summary Details
More options …

International Journal of Chemical Reactor Engineering

Ed. by de Lasa, Hugo / Xu, Charles Chunbao

12 Issues per year

IMPACT FACTOR 2017: 0.881
5-year IMPACT FACTOR: 0.908

CiteScore 2017: 0.86

SCImago Journal Rank (SJR) 2017: 0.306
Source Normalized Impact per Paper (SNIP) 2017: 0.503

See all formats and pricing
More options …
Volume 9, Issue 1


Volume 9 (2011)

Volume 8 (2010)

Volume 7 (2009)

Volume 6 (2008)

Volume 5 (2007)

Volume 4 (2006)

Volume 3 (2005)

Volume 2 (2004)

Volume 1 (2002)

Kinetics Study of Esterification Reaction of 2-Methyl-4-Chlorophenoxyacetic Acid (MCPA Acid)

Pei San Kong / Mohamed Kheireddine Aroua / Aziz Abdul Raman Ir.
Published Online: 2011-12-01 | DOI: https://doi.org/10.2202/1542-6580.2652

MCPA ester is a postemergence and selective herbicide widely used in controlling weed growth. This is due to the low solubility of MCPA ester in water which differs from majority of the other herbicides. With low solubility, the chance of water pollution is lesser comparatively. MCPA ester can degrade in soil by biological and biotic mechanism which reduces the soil pollution. Despite the wide application of this ester, the kinetic data on synthesis of MCPA ester is still considered as a proprietary data and it is not available in the open literature. Therefore kinetic studies are conducted in this work. MCPA ester was synthesized by reacting MCPA acid and 2-ethylhexanol in the presence of sulfuric acid as a catalyst. The parameters studied were reaction temperature, catalyst concentration and alcohol to acid molar ratio. The reaction was conducted in a jacketed batch reactor and samples were taken at an appropriate time intervals. The concentration MCPA ester was determined by gas chromatography mass spectrometry (GC-MSD) analysis. The experimental data were fitted with proposed homogeneous integrated second order kinetic model and the fitting accuracy at 373K, 383K and 393K were 0.99, 0.95 and 0.99 respectively. The activation energy and frequency factor were estimated to be 71.559 kJmol-1 and 1.221 x 107 Lmol-1 min-1 respectively. Kinetic constant values were 0.844 x 103 to 6.331 x 103 Lmol-1 min-1 within the range of the temperature and concentration studied. As predicted, the activation energy decreases with increases in catalyst concentration and the values at 0.01M, 0.1M and 0.5M catalyst concentration were 73.6, 71.7 and 69.4 kJmol-1 respectively.

Keywords: kinetic; esterification; MCPA acid; 2-ethylhexanol; sulfuric acid

About the article

Published Online: 2011-12-01

Citation Information: International Journal of Chemical Reactor Engineering, Volume 9, Issue 1, ISSN (Online) 1542-6580, DOI: https://doi.org/10.2202/1542-6580.2652.

Export Citation

©2012 Walter de Gruyter GmbH & Co. KG, Berlin/Boston.Get Permission

Citing Articles

Here you can find all Crossref-listed publications in which this article is cited. If you would like to receive automatic email messages as soon as this article is cited in other publications, simply activate the “Citation Alert” on the top of this page.

Pei San Kong, Mohamed Kheireddine Aroua, and Wan Mohd Ashri Wan Daud
Reviews in Chemical Engineering, 2015, Volume 31, Number 5

Comments (0)

Please log in or register to comment.
Log in