P. M. França, A. P. Santos, C. Queiroz, K. C. A. Santos, A. Silva, S. Mattedi
This work evaluates the adsorption capacity of the wild cane fiber (Gynerium Sagittatum) in crude oil. Both untreated biomass and treated with ionic liquid [2HEA][Ac] and acetylated were studied for oil spill cleanup in aqueous environment. Crude oil adsorption tests were performed in a thermostatic bath, varying the time for the kinetic study and the amount of oil for isotherm model. Kinetic study of oil adsorption allowed us to identify that the untreated fiber reached saturation in 90 minutes, while the fiber treated with acetylated and ionic liquid reached saturation in 30 minutes. In equilibrium, the total amount of oil adsorbed by the untreated fiber was 3.8g, whereas in acetylated and ionic liquid treated fiber, the obtained maximum adsorption capacity was 4.4 and 3.7 g, respectively. The remediation process using wild cane fiber followed a second order kinetic rate and Sips and Toth isotherm models provided the best fit to experimental data.
{"title":"ADSORPTION OF CRUDE OIL IN AQUEOUS ENVIRONMENT USING WILD CANE FIBER: EQUILIBRIUM AND KINETIC STUDIES","authors":"P. M. França, A. P. Santos, C. Queiroz, K. C. A. Santos, A. Silva, S. Mattedi","doi":"10.5419/bjpg2019-0028","DOIUrl":"https://doi.org/10.5419/bjpg2019-0028","url":null,"abstract":"This work evaluates the adsorption capacity of the wild cane fiber (Gynerium Sagittatum) in crude oil. Both untreated biomass and treated with ionic liquid [2HEA][Ac] and acetylated were studied for oil spill cleanup in aqueous environment. Crude oil adsorption tests were performed in a thermostatic bath, varying the time for the kinetic study and the amount of oil for isotherm model. Kinetic study of oil adsorption allowed us to identify that the untreated fiber reached saturation in 90 minutes, while the fiber treated with acetylated and ionic liquid reached saturation in 30 minutes. In equilibrium, the total amount of oil adsorbed by the untreated fiber was 3.8g, whereas in acetylated and ionic liquid treated fiber, the obtained maximum adsorption capacity was 4.4 and 3.7 g, respectively. The remediation process using wild cane fiber followed a second order kinetic rate and Sips and Toth isotherm models provided the best fit to experimental data.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"1 1","pages":"333-354"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77225183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Thiago Barbosa da Silva, E. T. L. Junior, L. P. Gouveia
In oil and gas wells scenario, casing design is a crucial stage of the project, representing the major structural elements responsible for maintaining well integrity through its lifetime and allowing adequate production activities. The occurrence of failures in casing systems can lead to irreversible safety problems in well operation. It is estimated that between 85% to 95% of the failures in well tubulars are related to joints (Payne et al., 2006). This work aims to analyze mechanical models of API casing connections in a probabilistic framework. The formulation for evaluating the strength of tubulars, under various load conditions, is presented by the code API TR 5C3 (2008), widely used by oil and gas companies worldwide. The reliability analysis is performed by the Monte Carlo simulation and First Order Reliability Method (FORM), considering failure modes by fracture in round and buttress connections, beyond failures by pull-out in round connections.
在油气井中，套管设计是项目的关键阶段，它代表了主要的结构元素，负责在整个生命周期内保持油井的完整性，并允许充分的生产活动。套管系统故障的发生会导致井作业中出现不可逆转的安全问题。据估计，85%至95%的井管柱失效与节理有关(Payne et al.， 2006)。这项工作的目的是在概率框架下分析API套管连接的力学模型。在各种载荷条件下评估管柱强度的公式由API TR 5C3(2008)规范提出，该规范被世界各地的石油和天然气公司广泛使用。可靠性分析采用蒙特卡罗模拟和一阶可靠性方法(FORM)进行，考虑了圆形连接和支撑连接的断裂失效模式，以及圆形连接的拔出失效模式。
{"title":"STRUCTURAL RELIABILITY APPLIED TO ANALYTICAL MODELING OF THE TENSILE STRENGTH OF STANDARD API CASING CONNECTIONS","authors":"Thiago Barbosa da Silva, E. T. L. Junior, L. P. Gouveia","doi":"10.5419/bjpg2019-0025","DOIUrl":"https://doi.org/10.5419/bjpg2019-0025","url":null,"abstract":"In oil and gas wells scenario, casing design is a crucial stage of the project, representing the major structural elements responsible for maintaining well integrity through its lifetime and allowing adequate production activities. The occurrence of failures in casing systems can lead to irreversible safety problems in well operation. It is estimated that between 85% to 95% of the failures in well tubulars are related to joints (Payne et al., 2006). This work aims to analyze mechanical models of API casing connections in a probabilistic framework. The formulation for evaluating the strength of tubulars, under various load conditions, is presented by the code API TR 5C3 (2008), widely used by oil and gas companies worldwide. The reliability analysis is performed by the Monte Carlo simulation and First Order Reliability Method (FORM), considering failure modes by fracture in round and buttress connections, beyond failures by pull-out in round connections.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"8 1","pages":"301-307"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76509424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Propylene in a purity degree above 99.5% (polymer purity grade- PPG) is a first-generation basic petrochemical that represents a vital link in refining-petrochemical integration. The strict specification of the product and the need to maximize the energy efficiency of the propylene/propane distillation process poses several challenges to the optimization of both the design and operation of the plant. Using a Petro-SIM (KBC) technology, a polymer grade general model from a propylene distillation unit was developed by means of vapor recompression. The sensitivity for feeding with different propylene fractions was analyzed, reaching a value of 0.94, which is considered the minimum propylene fraction in the feed required to the tower to generate a product with polymer purity grade. Based on the data obtained in the simulation, the tower was designed and evaluated by means of vapor recompression, showing a potential alternative way to obtain propylene at polymer grade which could be cost saving in industrial processes.
{"title":"DESIGN AND EVALUATION OF A SYSTEM TO OBTAIN POLYMER GRADE PROPYLENE BY MEANS OF VAPOR RECOMPRESSION DISTILLATION","authors":"M. Fontana, L. Fernandes, T. A. Souza","doi":"10.5419/bjpg2019-0027","DOIUrl":"https://doi.org/10.5419/bjpg2019-0027","url":null,"abstract":"Propylene in a purity degree above 99.5% (polymer purity grade- PPG) is a first-generation basic petrochemical that represents a vital link in refining-petrochemical integration. The strict specification of the product and the need to maximize the energy efficiency of the propylene/propane distillation process poses several challenges to the optimization of both the design and operation of the plant. Using a Petro-SIM (KBC) technology, a polymer grade general model from a propylene distillation unit was developed by means of vapor recompression. The sensitivity for feeding with different propylene fractions was analyzed, reaching a value of 0.94, which is considered the minimum propylene fraction in the feed required to the tower to generate a product with polymer purity grade. Based on the data obtained in the simulation, the tower was designed and evaluated by means of vapor recompression, showing a potential alternative way to obtain propylene at polymer grade which could be cost saving in industrial processes.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"130 1","pages":"323-332"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79592823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. A. Camargo, A. Ramos, D. Gatto, R. Beltrame, J. Monks
Petroleum blending is viewed as a critical optimization strategy adopted by several operations of petroleum production in the refineries around the world. A persistent problem called crude oil incompatibility occurs when the mixture of different oils lead to the formation of solid phases due to the precipitation of asphaltenes. The present work investigates the relationship between the occurrence of sludge in petroleum storage tanks and petroleum blending operations. Hildebrand solubility parameters of the oils were determined, revealing that one of the samples of petroleum analyzed is at the threshold of the asphaltene flocculation parameter, with an average of 16.1 Mpa1/2. Thus, it implies that blending operations with dissimilar petroleum feedstocks must be well planned, since they can initiate the precipitation of the asphaltenes and, consequently, the formation of sludge that accumulate and deposit as sediments inside petroleum storage tanks.
{"title":"ORGANIC DEPOSITION IN PETROLEUM STORAGE TANKS AT REFINERIES DUE TO BLENDING OPERATIONS","authors":"R. A. Camargo, A. Ramos, D. Gatto, R. Beltrame, J. Monks","doi":"10.5419/bjpg2019-0022","DOIUrl":"https://doi.org/10.5419/bjpg2019-0022","url":null,"abstract":"Petroleum blending is viewed as a critical optimization strategy adopted by several operations of petroleum production in the refineries around the world. A persistent problem called crude oil incompatibility occurs when the mixture of different oils lead to the formation of solid phases due to the precipitation of asphaltenes. The present work investigates the relationship between the occurrence of sludge in petroleum storage tanks and petroleum blending operations. Hildebrand solubility parameters of the oils were determined, revealing that one of the samples of petroleum analyzed is at the threshold of the asphaltene flocculation parameter, with an average of 16.1 Mpa1/2. Thus, it implies that blending operations with dissimilar petroleum feedstocks must be well planned, since they can initiate the precipitation of the asphaltenes and, consequently, the formation of sludge that accumulate and deposit as sediments inside petroleum storage tanks.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"42 1","pages":"265-274"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77643290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
When drilling an oil well, a viscous fluid is injected to aid drilling. This fluid is also responsible for removing the cuttings and maintaining structural stability of well. The rheology of this drilling fluid has a direct influence on the cleaning of the well, on the dynamics of the fluid in pipe and annular areas. Linear mathematical extrapolations for high pressure and high temperature environments can lead to rheology errors up to 75%. In this study, a finite volume model was developed to simulate the flow of a water-based mud in annular and jetting environments in the drilling environment. Annulars were made by steel pipes and permeable formations. The fluids evaluated were developed empirically with xanthan gum and bentonite clay. The numerical results are consistent with literature and represent characteristics of a Yield Power Law fluid and a Bingham plastic. A comparison was made with water, allowing a correlation between rheological effects and fluid dynamics in annular and high vorticity regions.
{"title":"NUMERICAL SIMULATION OF DRILLING FLUID BEHAVIOR IN DIFFERENT DEPTHS OF AN OIL WELL","authors":"A. F. C. Gomes, J. G. O. Marinho, J. L. L. Santos","doi":"10.5419/bjpg2019-0026","DOIUrl":"https://doi.org/10.5419/bjpg2019-0026","url":null,"abstract":"When drilling an oil well, a viscous fluid is injected to aid drilling. This fluid is also responsible for removing the cuttings and maintaining structural stability of well. The rheology of this drilling fluid has a direct influence on the cleaning of the well, on the dynamics of the fluid in pipe and annular areas. Linear mathematical extrapolations for high pressure and high temperature environments can lead to rheology errors up to 75%. In this study, a finite volume model was developed to simulate the flow of a water-based mud in annular and jetting environments in the drilling environment. Annulars were made by steel pipes and permeable formations. The fluids evaluated were developed empirically with xanthan gum and bentonite clay. The numerical results are consistent with literature and represent characteristics of a Yield Power Law fluid and a Bingham plastic. A comparison was made with water, allowing a correlation between rheological effects and fluid dynamics in annular and high vorticity regions.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"52 1","pages":"309-322"},"PeriodicalIF":0.0,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88327015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Curbelo, T. T. Caminha, A. Garnica, G. Melo, E. A. Araújo, J. Freitas
The objective of this work is to evaluate the effective removal of mud cake formed by drilling fluid for microemulsion-based flushing fluid. The microemulsions were prepared with vegetable castor oil, 2%wt KCl as aqueous phase, and nonionic surfactant (Ultranex NP40). Thermal stability, rheological, removal, and wettability inversion were performed to evaluate the performance of the microemulsion-based flushing fluid. Rheological tests showed that microemulsions behaved like Newtonian fluids. The best formulation of flushing fluid was 70% surfactant/25% oil phase/5% aqueous phase, with cloudy temperature at 365.25 K, removal efficiency of mud cake of 84.85 %, and high capability of wettability inversion.
{"title":"MICROEMULSION-BASED FLUSHING FLUID FOR EFFECTIVE REMOVAL OF FILTER CAKE IN WELLS CEMENTATION","authors":"F. Curbelo, T. T. Caminha, A. Garnica, G. Melo, E. A. Araújo, J. Freitas","doi":"10.5419/bjpg2019-0012","DOIUrl":"https://doi.org/10.5419/bjpg2019-0012","url":null,"abstract":"The objective of this work is to evaluate the effective removal of mud cake formed by drilling fluid for microemulsion-based flushing fluid. The microemulsions were prepared with vegetable castor oil, 2%wt KCl as aqueous phase, and nonionic surfactant (Ultranex NP40). Thermal stability, rheological, removal, and wettability inversion were performed to evaluate the performance of the microemulsion-based flushing fluid. Rheological tests showed that microemulsions behaved like Newtonian fluids. The best formulation of flushing fluid was 70% surfactant/25% oil phase/5% aqueous phase, with cloudy temperature at 365.25 K, removal efficiency of mud cake of 84.85 %, and high capability of wettability inversion.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88103142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. ‐. Gomez, K. B. Gomes, V. M. D. Oliveira, S. Mattedi, G. Simonelli, L. C. Santos, A. Lobato
Currently, the use of ionic liquids (ILs), such as catalysts and co-solvents, in the production of biodiesel commonly demands extreme operating conditions (especially temperature and / or time). Besides the environmental benefits, these compounds have versatile physical and chemical properties. Some of these compounds also possess amphiphilic features that allow them to act as surfactants and, in this case, when employed as additives in transesterification reactions, they can overcome mass transfer limitations and, consequently, the reaction rate. This work aims at studying the effects of protic ionic liquid (PIL) 2-hydroxyethylammonium hexanoate [2HEA][Hx] in the alkaline transesterification of soybean oil using methanol and a methanol/ethanol mixture. The reaction conditions were alcohol/oil molar ratio of 6:1, 1.5% (%wt/wt) KOH as the catalyst, 2% (%wt/wt) PIL as the additive, 60 °C, and 30 min reaction time. The highest mass yield was 92.72% for both pure methanol and methanol/ethanol mixture (molar ratios 5:1), since the mean was not statistically different for those two ratios.
{"title":"EFFECTS OF THE ADDITION OF [2HEA][HX] ON BIODIESEL SYNTHESIS USING METHANOL AND METHANOL/ETHANOL MIXTURE","authors":"I. ‐. Gomez, K. B. Gomes, V. M. D. Oliveira, S. Mattedi, G. Simonelli, L. C. Santos, A. Lobato","doi":"10.5419/bjpg2019-0015","DOIUrl":"https://doi.org/10.5419/bjpg2019-0015","url":null,"abstract":"Currently, the use of ionic liquids (ILs), such as catalysts and co-solvents, in the production of biodiesel commonly demands extreme operating conditions (especially temperature and / or time). Besides the environmental benefits, these compounds have versatile physical and chemical properties. Some of these compounds also possess amphiphilic features that allow them to act as surfactants and, in this case, when employed as additives in transesterification reactions, they can overcome mass transfer limitations and, consequently, the reaction rate. This work aims at studying the effects of protic ionic liquid (PIL) 2-hydroxyethylammonium hexanoate [2HEA][Hx] in the alkaline transesterification of soybean oil using methanol and a methanol/ethanol mixture. The reaction conditions were alcohol/oil molar ratio of 6:1, 1.5% (%wt/wt) KOH as the catalyst, 2% (%wt/wt) PIL as the additive, 60 °C, and 30 min reaction time. The highest mass yield was 92.72% for both pure methanol and methanol/ethanol mixture (molar ratios 5:1), since the mean was not statistically different for those two ratios.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87807272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present study assesses the effects of ethyl octanoate and ethyl oleate on the gasoline lubricity. Samples of gasoline fuel were prepared with different amounts of esters (0%, 2.5%, 5%, 10%, and 15%) and then evaluated. The lubricity tests were carried out using a High Frequency Reciprocating Test Rig (HFRR) equipment. The Wear Scar Diameter (WSD) values decreased as ester proportions increased in the samples. The percentage of lubricant film presented values above 85% for formulations with 10% and 15% ester concentration. Coefficient of friction values showed a similar behavior, they decreased as the esters fractions have increased. Results demonstrate that the esters when added to gasoline can improve the fuel lubricity.
{"title":"EVALUATION OF THE LUBRICATION OF ETHYL OLEATE AND ETHYL OCTANOATE AS GASOLINE ADDITIVE","authors":"Suzara R.C. Sena, E. Neto, C. G. Pereira","doi":"10.5419/bjpg2019-0011","DOIUrl":"https://doi.org/10.5419/bjpg2019-0011","url":null,"abstract":"The present study assesses the effects of ethyl octanoate and ethyl oleate on the gasoline lubricity. Samples of gasoline fuel were prepared with different amounts of esters (0%, 2.5%, 5%, 10%, and 15%) and then evaluated. The lubricity tests were carried out using a High Frequency Reciprocating Test Rig (HFRR) equipment. The Wear Scar Diameter (WSD) values decreased as ester proportions increased in the samples. The percentage of lubricant film presented values above 85% for formulations with 10% and 15% ester concentration. Coefficient of friction values showed a similar behavior, they decreased as the esters fractions have increased. Results demonstrate that the esters when added to gasoline can improve the fuel lubricity.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75716389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. M. F. Melo, J. Tenorio, A. G. Oliveira, J. P. L. Santos
The present work aims to develop a case study using the casing well interface (CWELL), developed by the Federal University of Alagoas, Brazil. Considering the well critical environment during the gas kick along with wait on cement (WOC) test and cement displacement, we sought to observe the behavior of different casing pipes regarding the stress submitted. The case study analyzes an offshore vertical well, with a water depth of 1574 meters. The well was subjected to a kick of 50 bbl and with an inflow gradient of 2.0 lb/gal. Triaxial loads were obtained through the von-Mises and American Petroleum Institute (API) envelopes, which can be used to analyze the integrity of the tubes. Through the analysis between the resistances returned by Petroleum Engineering Applications System (SAEP), it is possible to verify the possibility of failure of the tubes for each project scenario. This analysis is important for determining the sizing of the columns to obtain the best performance of the structures.
{"title":"INTEGRATED EVALUATION OF CEMENT AND KICK SCENARIOS IN OIL WELL DESIGN","authors":"J. M. F. Melo, J. Tenorio, A. G. Oliveira, J. P. L. Santos","doi":"10.5419/bjpg2019-0019","DOIUrl":"https://doi.org/10.5419/bjpg2019-0019","url":null,"abstract":"The present work aims to develop a case study using the casing well interface (CWELL), developed by the Federal University of Alagoas, Brazil. Considering the well critical environment during the gas kick along with wait on cement (WOC) test and cement displacement, we sought to observe the behavior of different casing pipes regarding the stress submitted. The case study analyzes an offshore vertical well, with a water depth of 1574 meters. The well was subjected to a kick of 50 bbl and with an inflow gradient of 2.0 lb/gal. Triaxial loads were obtained through the von-Mises and American Petroleum Institute (API) envelopes, which can be used to analyze the integrity of the tubes. Through the analysis between the resistances returned by Petroleum Engineering Applications System (SAEP), it is possible to verify the possibility of failure of the tubes for each project scenario. This analysis is important for determining the sizing of the columns to obtain the best performance of the structures.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75348052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Câmara, M. A. Sousa, E. Neto, M. C. A. Oliveira
Biosurfactants are employed in several industrial applications which require a high purity level. However, the downstream purification processes are responsible for a large portion of the expenses incurred by biosurfactant production plants. The high costs associated with these processes turn their application on a large scale a challenge for companies. This study aimed to evaluate the influence of the purification step on the capacity of the rhamnolipid produced by a Pseudomonas aeruginosa strain to recover oil. Both purified and non-purified biosurfactants were efficient in their ability to recover oil. The best result, for the API gravity oil of 27.67, presented a total Recovery Factor of 47.45±1.78%, in which 10.2±0.85% corresponds to the MEOR. However, the results show that non-purified biosurfactant was more efficient in terms of amount of oil recovered during the MEOR stage. This demonstrates that the purification step may not be necessary, reducing the production costs of the rhamnolipid.
{"title":"EVALUATION OF THE PURIFICATION PROCESS IN RHAMNOLIPID BIOSURFACTANT FOR APPLICATION IN MICROBIAL-ENHANCED OIL RECOVERY (MEOR)","authors":"J. Câmara, M. A. Sousa, E. Neto, M. C. A. Oliveira","doi":"10.5419/bjpg2019-0016","DOIUrl":"https://doi.org/10.5419/bjpg2019-0016","url":null,"abstract":"Biosurfactants are employed in several industrial applications which require a high purity level. However, the downstream purification processes are responsible for a large portion of the expenses incurred by biosurfactant production plants. The high costs associated with these processes turn their application on a large scale a challenge for companies. This study aimed to evaluate the influence of the purification step on the capacity of the rhamnolipid produced by a Pseudomonas aeruginosa strain to recover oil. Both purified and non-purified biosurfactants were efficient in their ability to recover oil. The best result, for the API gravity oil of 27.67, presented a total Recovery Factor of 47.45±1.78%, in which 10.2±0.85% corresponds to the MEOR. However, the results show that non-purified biosurfactant was more efficient in terms of amount of oil recovered during the MEOR stage. This demonstrates that the purification step may not be necessary, reducing the production costs of the rhamnolipid.","PeriodicalId":9312,"journal":{"name":"Brazilian Journal of Petroleum and Gas","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76805357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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