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Paitoon Tontiwachwuthikul - One of the best experts on this subject based on the ideXlab platform.
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co2 absorption kinetics of 4 diethylamine 2 butanol solvent using stopped flow technique
Separation and Purification Technology, 2014Co-Authors: Teerawat Sema, Paitoon Tontiwachwuthikul, Zhiwu Liang, Kaiyun Fu, Raphael Idem, Yanqing NaAbstract:Abstract In the present work, a stopped-flow apparatus was used to determine the CO 2 absorption kinetics of 4-diethylamine-2-butanol (DEAB) in terms of observed pseudo-first-order Rate Constant ( k 0 ) and second order Reaction Rate Constant ( k 2 ). The experiments were done using DEAB in the concentration range of 0.10–0.90 kmol/m 3 , and a temperature range of 293–313 K. The p K a of DEAB was also experimentally determined over a temperature range of 278–333 K. The Bronsted relationship between the Reaction Rate Constant obtained from the stopped-flow apparatus and p K a obtained from experimental determination was then evaluated. The results showed that the Bronsted correlation could predict the absorption Rate Constant with an AAD of 8.6%, which is within an acceptable range of 10%. By comparing through different evaluation techniques such as k 2 , p K a and Δ r G m ° , it was observed that DEAB has faster Reaction kinetics than those of conventional tertiary amines, namely, DEMEA, DMMEA and MDEA.
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kinetics of co2 absorption into a novel 1 diethylamino 2 propanol solvent using stopped flow technique
Aiche Journal, 2014Co-Authors: Zhiwu Liang, Teerawat Sema, Raphael Idem, Yanqing Na, Wichitpan Rongwong, Chen Li, Paitoon TontiwachwuthikulAbstract:A stopped-flow apparatus was used to measure the kinetics of carbon dioxide (CO2) absorption into aqueous solution of 1-diethylamino-2-propanol (1DEA2P) in terms of observed pseudo-first-order Rate Constant (ko) and second-order Reaction Rate Constant (k2), in this work. The experiments were conducted over a 1DEA2P concentration range of 120–751 mol/m3, and a temperature range of 298–313 K. As 1DEA2P is a tertiary amine, the base-catalyzed hydration mechanism was, then, applied to correlate the experimental CO2 absorption Rate Constants obtained from stopped-flow apparatus. In addition, the pKa of 1DEA2P was experimentally measured over a temperature range of 278–333 K. The Bronsted relationship between Reaction Rate Constant (obtained from stopped-flow apparatus) and pKa was, then, studied. The results showed that the correlation based on the Bronsted relationship performed very well for predicting the absorption Rate Constant with an absolute average deviation of 5.2%, which is in an acceptable range of less than 10%. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3502–3510, 2014
Raphael Idem - One of the best experts on this subject based on the ideXlab platform.
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co2 absorption kinetics of 4 diethylamine 2 butanol solvent using stopped flow technique
Separation and Purification Technology, 2014Co-Authors: Teerawat Sema, Paitoon Tontiwachwuthikul, Zhiwu Liang, Kaiyun Fu, Raphael Idem, Yanqing NaAbstract:Abstract In the present work, a stopped-flow apparatus was used to determine the CO 2 absorption kinetics of 4-diethylamine-2-butanol (DEAB) in terms of observed pseudo-first-order Rate Constant ( k 0 ) and second order Reaction Rate Constant ( k 2 ). The experiments were done using DEAB in the concentration range of 0.10–0.90 kmol/m 3 , and a temperature range of 293–313 K. The p K a of DEAB was also experimentally determined over a temperature range of 278–333 K. The Bronsted relationship between the Reaction Rate Constant obtained from the stopped-flow apparatus and p K a obtained from experimental determination was then evaluated. The results showed that the Bronsted correlation could predict the absorption Rate Constant with an AAD of 8.6%, which is within an acceptable range of 10%. By comparing through different evaluation techniques such as k 2 , p K a and Δ r G m ° , it was observed that DEAB has faster Reaction kinetics than those of conventional tertiary amines, namely, DEMEA, DMMEA and MDEA.
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kinetics of co2 absorption into a novel 1 diethylamino 2 propanol solvent using stopped flow technique
Aiche Journal, 2014Co-Authors: Zhiwu Liang, Teerawat Sema, Raphael Idem, Yanqing Na, Wichitpan Rongwong, Chen Li, Paitoon TontiwachwuthikulAbstract:A stopped-flow apparatus was used to measure the kinetics of carbon dioxide (CO2) absorption into aqueous solution of 1-diethylamino-2-propanol (1DEA2P) in terms of observed pseudo-first-order Rate Constant (ko) and second-order Reaction Rate Constant (k2), in this work. The experiments were conducted over a 1DEA2P concentration range of 120–751 mol/m3, and a temperature range of 298–313 K. As 1DEA2P is a tertiary amine, the base-catalyzed hydration mechanism was, then, applied to correlate the experimental CO2 absorption Rate Constants obtained from stopped-flow apparatus. In addition, the pKa of 1DEA2P was experimentally measured over a temperature range of 278–333 K. The Bronsted relationship between Reaction Rate Constant (obtained from stopped-flow apparatus) and pKa was, then, studied. The results showed that the correlation based on the Bronsted relationship performed very well for predicting the absorption Rate Constant with an absolute average deviation of 5.2%, which is in an acceptable range of less than 10%. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3502–3510, 2014
E Valenciamorales - One of the best experts on this subject based on the ideXlab platform.
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the effect that different pozzolanic activity methods has on the kinetic Constants of the pozzolanic Reaction in sugar cane straw clay ash lime systems application of a kinetic diffusive model
Cement and Concrete Research, 2005Co-Authors: Moises Frias, M Sanchez I De Rojas, E Villarcocina, E ValenciamoralesAbstract:The Reaction kinetics of a mixture of sugar cane straw with 20% and 30% of clay burned at 800 and 1000 °C and lime (calcium hydroxide) is studied. A direct method (acceleRated chemical method) based on the measurement of the amount of lime reacted as the Reaction proceeds is applied. A kinetic–diffusive model published in a previous paper by some authors of this research is used. The fitting of the model by computerized methods allows determining the kinetic coefficients that characterize the process: in particular, the Reaction Rate Constant. The index of pozzolanic activity evaluated according to the obtained values of the Reaction Rate Constant permits to characterize the pozzolanic activity of these materials in a rigorous way. The results are compared with the results obtained applying an indirect method (conductometric method). The kinetic results obtained in the current paper allow affirming that the kinetic–diffuse model used in order to evaluate the pozzolanic Reaction is valid, independently of the method used for the evaluation of the pozzolanic activity.
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kinetics of the pozzolanic Reaction between lime and sugar cane straw ash by electrical conductivity measurement a kinetic diffusive model
Cement and Concrete Research, 2003Co-Authors: E Villarcocina, E Valenciamorales, R Gonzalezrodriguez, Jesus HernandezruizAbstract:Abstract The kinetics of the pozzolanic Reaction between lime (calcium hydroxide) and sugar cane straw ash (SCSA) with 20% and 30% of clay burned at 800 and 1000 °C is studied. A simple experimental technique was used in which the conductivity is the experimental variable. For correlating the conductivity with the concentration of calcium hydroxide (CH), a calibration curve was established. We elaboRated a mathematical model that allows us to describe the process in either kinetic or kinetic–diffusive regimes. The fitting of the model by computerized methods enables us determine the parameters that characterize the process: i.e. the diffusion coefficient and Reaction Rate Constant. The pozzolanic activity is evaluated according to the obtained values of the Reaction Rate Constant. The results show that SCSA has a good pozzolanic activity comparable to that of the rice husk ash (RHA).
Zhiwu Liang - One of the best experts on this subject based on the ideXlab platform.
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co2 absorption kinetics of 4 diethylamine 2 butanol solvent using stopped flow technique
Separation and Purification Technology, 2014Co-Authors: Teerawat Sema, Paitoon Tontiwachwuthikul, Zhiwu Liang, Kaiyun Fu, Raphael Idem, Yanqing NaAbstract:Abstract In the present work, a stopped-flow apparatus was used to determine the CO 2 absorption kinetics of 4-diethylamine-2-butanol (DEAB) in terms of observed pseudo-first-order Rate Constant ( k 0 ) and second order Reaction Rate Constant ( k 2 ). The experiments were done using DEAB in the concentration range of 0.10–0.90 kmol/m 3 , and a temperature range of 293–313 K. The p K a of DEAB was also experimentally determined over a temperature range of 278–333 K. The Bronsted relationship between the Reaction Rate Constant obtained from the stopped-flow apparatus and p K a obtained from experimental determination was then evaluated. The results showed that the Bronsted correlation could predict the absorption Rate Constant with an AAD of 8.6%, which is within an acceptable range of 10%. By comparing through different evaluation techniques such as k 2 , p K a and Δ r G m ° , it was observed that DEAB has faster Reaction kinetics than those of conventional tertiary amines, namely, DEMEA, DMMEA and MDEA.
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kinetics of co2 absorption into a novel 1 diethylamino 2 propanol solvent using stopped flow technique
Aiche Journal, 2014Co-Authors: Zhiwu Liang, Teerawat Sema, Raphael Idem, Yanqing Na, Wichitpan Rongwong, Chen Li, Paitoon TontiwachwuthikulAbstract:A stopped-flow apparatus was used to measure the kinetics of carbon dioxide (CO2) absorption into aqueous solution of 1-diethylamino-2-propanol (1DEA2P) in terms of observed pseudo-first-order Rate Constant (ko) and second-order Reaction Rate Constant (k2), in this work. The experiments were conducted over a 1DEA2P concentration range of 120–751 mol/m3, and a temperature range of 298–313 K. As 1DEA2P is a tertiary amine, the base-catalyzed hydration mechanism was, then, applied to correlate the experimental CO2 absorption Rate Constants obtained from stopped-flow apparatus. In addition, the pKa of 1DEA2P was experimentally measured over a temperature range of 278–333 K. The Bronsted relationship between Reaction Rate Constant (obtained from stopped-flow apparatus) and pKa was, then, studied. The results showed that the correlation based on the Bronsted relationship performed very well for predicting the absorption Rate Constant with an absolute average deviation of 5.2%, which is in an acceptable range of less than 10%. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3502–3510, 2014
Teerawat Sema - One of the best experts on this subject based on the ideXlab platform.
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co2 absorption kinetics of 4 diethylamine 2 butanol solvent using stopped flow technique
Separation and Purification Technology, 2014Co-Authors: Teerawat Sema, Paitoon Tontiwachwuthikul, Zhiwu Liang, Kaiyun Fu, Raphael Idem, Yanqing NaAbstract:Abstract In the present work, a stopped-flow apparatus was used to determine the CO 2 absorption kinetics of 4-diethylamine-2-butanol (DEAB) in terms of observed pseudo-first-order Rate Constant ( k 0 ) and second order Reaction Rate Constant ( k 2 ). The experiments were done using DEAB in the concentration range of 0.10–0.90 kmol/m 3 , and a temperature range of 293–313 K. The p K a of DEAB was also experimentally determined over a temperature range of 278–333 K. The Bronsted relationship between the Reaction Rate Constant obtained from the stopped-flow apparatus and p K a obtained from experimental determination was then evaluated. The results showed that the Bronsted correlation could predict the absorption Rate Constant with an AAD of 8.6%, which is within an acceptable range of 10%. By comparing through different evaluation techniques such as k 2 , p K a and Δ r G m ° , it was observed that DEAB has faster Reaction kinetics than those of conventional tertiary amines, namely, DEMEA, DMMEA and MDEA.
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kinetics of co2 absorption into a novel 1 diethylamino 2 propanol solvent using stopped flow technique
Aiche Journal, 2014Co-Authors: Zhiwu Liang, Teerawat Sema, Raphael Idem, Yanqing Na, Wichitpan Rongwong, Chen Li, Paitoon TontiwachwuthikulAbstract:A stopped-flow apparatus was used to measure the kinetics of carbon dioxide (CO2) absorption into aqueous solution of 1-diethylamino-2-propanol (1DEA2P) in terms of observed pseudo-first-order Rate Constant (ko) and second-order Reaction Rate Constant (k2), in this work. The experiments were conducted over a 1DEA2P concentration range of 120–751 mol/m3, and a temperature range of 298–313 K. As 1DEA2P is a tertiary amine, the base-catalyzed hydration mechanism was, then, applied to correlate the experimental CO2 absorption Rate Constants obtained from stopped-flow apparatus. In addition, the pKa of 1DEA2P was experimentally measured over a temperature range of 278–333 K. The Bronsted relationship between Reaction Rate Constant (obtained from stopped-flow apparatus) and pKa was, then, studied. The results showed that the correlation based on the Bronsted relationship performed very well for predicting the absorption Rate Constant with an absolute average deviation of 5.2%, which is in an acceptable range of less than 10%. © 2014 American Institute of Chemical Engineers AIChE J, 60: 3502–3510, 2014
