Three mass transfer properties: the effective area (ae), liquid film and gas film mass transfer c... more Three mass transfer properties: the effective area (ae), liquid film and gas film mass transfer coefficients (kL and kG) are measured consistently for eleven packings with different surface area and corrugation angle. The effective area and liquid film mass transfer coefficient increases with liquid velocity while gas film mass transfer coefficient increases with gas velocity. The fractional effective area decreases with surface area and barely changes with corrugation angle. kL and kG increase as surface area increases or corrugation angle decreases. A new concept-mixing point density is proposed to represent the packing geometry influence on kL and kG. Correlations for ae, kL, and kG are developed including effects of gas and liquid rates and packing geometry.
The Separations Research Program (SRP) pilot plant is located at The University of Texas (UT) Pic... more The Separations Research Program (SRP) pilot plant is located at The University of Texas (UT) Pickle Research Campus and has been operated as a carbon capture facility since 2002. The semi-works scale pilot facility uses air and 3–14 mol% CO2 as flue gas as it applies the latest advancements in carbon dioxide recovery technology. The capacity of the pilot plant is approximately 15 m3/min of gas and 130 liters/min of solvent. Past experimental studies include solvent performance characterization using potassium carbonate with piperazine, monoethanolamine, concentrated piperazine and other proprietary solvents. In recent years, the pilot plant has been utilized to determine the mass transfer and hydraulic characteristics of various structured and random packings using amine-based solvents for CO2 absorption.In 2002, the UT/SRP began developing improved measurement techniques and operating procedures to ensure reliable process control and closure of material and energy balances. Past experience and learning with the UT/SRP pilot plant is currently being utilized for the design and operation of several future pilot plants that will process actual coal-fired flue gas. The purpose of the presentation is to provide a brief description of the UT/SRP CO2 capture pilot plant capabilities, innovative operational procedures and instrument accuracies. The objectives of this paper are to discuss SRP pilot plant experience including: process description, operations and control, key equipment, measurement methods including novel techniques, overall process performance, and future work.
Total pressure was measured in CO2 loaded aqueous monoethanolamine, piperazine, 1-methyl-piperazi... more Total pressure was measured in CO2 loaded aqueous monoethanolamine, piperazine, 1-methyl-piperazine, 2-methyl-piperazine, and diglycolamine® at 82 to 191 °C from 115 to 2819 kPa. CO2 solubility is estimated from these data. Empirical models have been developed to predict the CO2 partial pressure of these amine solutions from 40 to 160 °C. The heat of CO2 absorption derived from these models varies from 66 kJ/mol
... (2008). "Creation of an Aspen RateSep absorber model for the evaluation of castor pilot ... more ... (2008). "Creation of an Aspen RateSep absorber model for the evaluation of castor pilot plant data." Preprint - American Chemical Society, Division of Petroleum Chemistry 53(1): 89-92. ... Chemical Engineering. Regina, Saskatchewan, Canada, University of Regina. Ph.D.: 364. ...
The objective of this work is to improve the process for COâ capture by alkanolamine absorption/s... more The objective of this work is to improve the process for COâ capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous KâCOâ promoted by piperazine. The stripper model with Aspen Custom Modeler and careful optimization of solvent rate suggests that 7 m MEA and 5 m K+/2.5 m PZ will be practically equivalent in energy requirement and optimum solution capacity. The multipressure stripper reduces energy consumption by 15% with a maximum pressure of 5 atm. The use of vanadium as a corrosion inhibitor will carry little risk of long-term environmental or health effects liability, but the disposal of solvent with vanadium will be subject to regulation, probably as a hazardous waste. Analysis of the pilot plant data from Campaign 1 has given values of the mass transfer coefficient consistent with the rate data from the wetted wall column. With a rich end pinch, 30% MEA should provide a capacity of 1.3-1.4 mole COâ/kg solvent.
International Journal of Greenhouse Gas Control, 2010
Concentrated, aqueous piperazine (PZ) has been investigated as a novel amine solvent for carbon d... more Concentrated, aqueous piperazine (PZ) has been investigated as a novel amine solvent for carbon dioxide (CO2) absorption. The CO2 absorption rate of aqueous PZ is more than double that of 7m MEA and the amine volatility at 40° C ranges from 11 to 21ppm. Thermal ...
... Lewis, A. Frank Seibert, R. Bruce Eldridge,* and Gary T. Rochelle. ... This drastic predictiv... more ... Lewis, A. Frank Seibert, R. Bruce Eldridge,* and Gary T. Rochelle. ... This drastic predictive swing was primarily due to the effect of the contact angle term: (1 − 0.93 cos γ) -1 . The Rocha−Bravo−Fair model estimates contact angle for sheet metal packing using eqs 19 and ...
... DEAt David M. Austgen and Gary T. Rochelle* Department of Chemical Engineering, The Universit... more ... DEAt David M. Austgen and Gary T. Rochelle* Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712 ... have been the most widely employed gas-treating alka-stream both acid gases* However, is also ...
Vapor-liquid equilibrium, speciation, and amine solubility were studied for the piperazine (PZ)/ ... more Vapor-liquid equilibrium, speciation, and amine solubility were studied for the piperazine (PZ)/ methyldiethanolamine (MDEA)/water/carbon dioxide system. Solubility data for carbon dioxide in these solutions were obtained using a wetted-wall contactor. Solubility data for anhydrous PZ solid in water were obtained by adding PZ flakes to an agitated flask. In a 0.6 M PZ/4 M MDEA solution at 313 K, the
... By either turning off the capture or reducing the load at times with daily peak power demand ... more ... By either turning off the capture or reducing the load at times with daily peak power demand or high electricity prices, all or part of the steam being used for solvent regeneration or for driving CO 2 compression can be used for power generation. ...
Three mass transfer properties: the effective area (ae), liquid film and gas film mass transfer c... more Three mass transfer properties: the effective area (ae), liquid film and gas film mass transfer coefficients (kL and kG) are measured consistently for eleven packings with different surface area and corrugation angle. The effective area and liquid film mass transfer coefficient increases with liquid velocity while gas film mass transfer coefficient increases with gas velocity. The fractional effective area decreases with surface area and barely changes with corrugation angle. kL and kG increase as surface area increases or corrugation angle decreases. A new concept-mixing point density is proposed to represent the packing geometry influence on kL and kG. Correlations for ae, kL, and kG are developed including effects of gas and liquid rates and packing geometry.
The Separations Research Program (SRP) pilot plant is located at The University of Texas (UT) Pic... more The Separations Research Program (SRP) pilot plant is located at The University of Texas (UT) Pickle Research Campus and has been operated as a carbon capture facility since 2002. The semi-works scale pilot facility uses air and 3–14 mol% CO2 as flue gas as it applies the latest advancements in carbon dioxide recovery technology. The capacity of the pilot plant is approximately 15 m3/min of gas and 130 liters/min of solvent. Past experimental studies include solvent performance characterization using potassium carbonate with piperazine, monoethanolamine, concentrated piperazine and other proprietary solvents. In recent years, the pilot plant has been utilized to determine the mass transfer and hydraulic characteristics of various structured and random packings using amine-based solvents for CO2 absorption.In 2002, the UT/SRP began developing improved measurement techniques and operating procedures to ensure reliable process control and closure of material and energy balances. Past experience and learning with the UT/SRP pilot plant is currently being utilized for the design and operation of several future pilot plants that will process actual coal-fired flue gas. The purpose of the presentation is to provide a brief description of the UT/SRP CO2 capture pilot plant capabilities, innovative operational procedures and instrument accuracies. The objectives of this paper are to discuss SRP pilot plant experience including: process description, operations and control, key equipment, measurement methods including novel techniques, overall process performance, and future work.
Total pressure was measured in CO2 loaded aqueous monoethanolamine, piperazine, 1-methyl-piperazi... more Total pressure was measured in CO2 loaded aqueous monoethanolamine, piperazine, 1-methyl-piperazine, 2-methyl-piperazine, and diglycolamine® at 82 to 191 °C from 115 to 2819 kPa. CO2 solubility is estimated from these data. Empirical models have been developed to predict the CO2 partial pressure of these amine solutions from 40 to 160 °C. The heat of CO2 absorption derived from these models varies from 66 kJ/mol
... (2008). "Creation of an Aspen RateSep absorber model for the evaluation of castor pilot ... more ... (2008). "Creation of an Aspen RateSep absorber model for the evaluation of castor pilot plant data." Preprint - American Chemical Society, Division of Petroleum Chemistry 53(1): 89-92. ... Chemical Engineering. Regina, Saskatchewan, Canada, University of Regina. Ph.D.: 364. ...
The objective of this work is to improve the process for COâ capture by alkanolamine absorption/s... more The objective of this work is to improve the process for COâ capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous KâCOâ promoted by piperazine. The stripper model with Aspen Custom Modeler and careful optimization of solvent rate suggests that 7 m MEA and 5 m K+/2.5 m PZ will be practically equivalent in energy requirement and optimum solution capacity. The multipressure stripper reduces energy consumption by 15% with a maximum pressure of 5 atm. The use of vanadium as a corrosion inhibitor will carry little risk of long-term environmental or health effects liability, but the disposal of solvent with vanadium will be subject to regulation, probably as a hazardous waste. Analysis of the pilot plant data from Campaign 1 has given values of the mass transfer coefficient consistent with the rate data from the wetted wall column. With a rich end pinch, 30% MEA should provide a capacity of 1.3-1.4 mole COâ/kg solvent.
International Journal of Greenhouse Gas Control, 2010
Concentrated, aqueous piperazine (PZ) has been investigated as a novel amine solvent for carbon d... more Concentrated, aqueous piperazine (PZ) has been investigated as a novel amine solvent for carbon dioxide (CO2) absorption. The CO2 absorption rate of aqueous PZ is more than double that of 7m MEA and the amine volatility at 40° C ranges from 11 to 21ppm. Thermal ...
... Lewis, A. Frank Seibert, R. Bruce Eldridge,* and Gary T. Rochelle. ... This drastic predictiv... more ... Lewis, A. Frank Seibert, R. Bruce Eldridge,* and Gary T. Rochelle. ... This drastic predictive swing was primarily due to the effect of the contact angle term: (1 − 0.93 cos γ) -1 . The Rocha−Bravo−Fair model estimates contact angle for sheet metal packing using eqs 19 and ...
... DEAt David M. Austgen and Gary T. Rochelle* Department of Chemical Engineering, The Universit... more ... DEAt David M. Austgen and Gary T. Rochelle* Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712 ... have been the most widely employed gas-treating alka-stream both acid gases* However, is also ...
Vapor-liquid equilibrium, speciation, and amine solubility were studied for the piperazine (PZ)/ ... more Vapor-liquid equilibrium, speciation, and amine solubility were studied for the piperazine (PZ)/ methyldiethanolamine (MDEA)/water/carbon dioxide system. Solubility data for carbon dioxide in these solutions were obtained using a wetted-wall contactor. Solubility data for anhydrous PZ solid in water were obtained by adding PZ flakes to an agitated flask. In a 0.6 M PZ/4 M MDEA solution at 313 K, the
... By either turning off the capture or reducing the load at times with daily peak power demand ... more ... By either turning off the capture or reducing the load at times with daily peak power demand or high electricity prices, all or part of the steam being used for solvent regeneration or for driving CO 2 compression can be used for power generation. ...
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Conference Presentations by Gary Rochelle
consistently for eleven packings with different surface area and corrugation angle. The effective area and liquid film mass
transfer coefficient increases with liquid velocity while gas film mass transfer coefficient increases with gas velocity. The
fractional effective area decreases with surface area and barely changes with corrugation angle. kL and kG increase as surface area
increases or corrugation angle decreases. A new concept-mixing point density is proposed to represent the packing geometry
influence on kL and kG. Correlations for ae, kL, and kG are developed including effects of gas and liquid rates and packing
geometry.
Papers by Gary Rochelle
consistently for eleven packings with different surface area and corrugation angle. The effective area and liquid film mass
transfer coefficient increases with liquid velocity while gas film mass transfer coefficient increases with gas velocity. The
fractional effective area decreases with surface area and barely changes with corrugation angle. kL and kG increase as surface area
increases or corrugation angle decreases. A new concept-mixing point density is proposed to represent the packing geometry
influence on kL and kG. Correlations for ae, kL, and kG are developed including effects of gas and liquid rates and packing
geometry.