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João Crisosthomo De Queiroz Neto - One of the best experts on this subject based on the ideXlab platform.
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Escoamento tubular e anular de fluido de perfuração com adição de poliacrilamida : efeito da redução de arraste
[s.n.], 2018Co-Authors: João Crisosthomo De Queiroz NetoAbstract:Orientadores: Sandra Cristina dos Santos Rocha, Cesar Costapinto SantanaDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia MecanicaResumo: Este trabalho é um estudo experimental do fenômeno de redução de fricção no escoamento do fluido de perfuração salgado, contendo poliacrilamida hidrolisada em tubos de 1"(2,54 cm), 11/4"(3,18 cm), e no anular de 3/2"(7,62/5,08 cm). Neste estudo, analisou-se o comportamento reológico do fluido de perfuração com concentrações de poliacrilamida entre O e 7133 ppm, tendo sido verificado que o modelo reológico de Robertson-Stiff descreve melhor o comportamento reológico destes fluidos para a faixa de deformação pesquisada. Os resultados experimentais do escoamento turbulento em tubos e ânulos foram utilizados para analisar o fenômeno de redução de fricção, através do estudo da influência da geometria, concentração de poliacrilamida hidrolisada, degradação, etc, nos fatores de fricção dos fluidos. Correlações empíricas, tipo Blasius,foram desenvolvidas para escoamento turbulento do solvente através dos tubos e ânulo estudados. o fenômeno de redução de arraste foi observado e quantificado para o intervalo de concentração de poliacrilamida hidrolisada analisada. Além disso foi estudada a influência da degradação mecânica desse polímero do ponto de vista qualitativo. Foi observado que a funcionalidade da poliacrilamida hidrolisada como redutor de friccão ,para o fluido de perfuração salgado,limita-se à faixa de concentração de 713 a 2853 ppm.Além disso,maiores percentuais de redução de fricção foram obtidos para concentrações entre 1141 e 1426 ppmAbstract: This work is a experimental study of drag reduction phenomenon in the salt drilling fluid that contains hydrolyzed Polyacrylamide and flows in 1", l1A"tubes and 3"/2"annulus, by turbulent flow. The rheological behavior of the salt drilling fluid with hydrolyzed Polyacrylamide in concentration between O and 7133 pp.m was analyzed. It was verified that the model proposed by Robertson-Stiff well deseribes the rheological behavior of the salt drilling fluids in the total range considered. Experimental results for the turbulent flow in the pipes and in the anulus were used to analyze the drag reduction phenomenon, by studying the influenee of the geometry, mechanical degradation, etc, in the friction factor of the drilling fluids. Empirical correlations Blasius type) were developed from experimental data for turbulent flow of the solvent (salt drilling fluid without hydrolyzed polyaerylamide) for tubes and annulus. The drag reduction phenomenon was observed and quantified for the analyzed concentration ranges of hydrolyzed polyaerylamide. Also, it was studied the influenee of this polymer's mechanical degradation from qualitative viewpoint It was noted that the function of hydrolyzed Polyacrylamide like drag reducer for salt drilling fluid ranges from 713 to 2853 ppm.However, the highest drag reduction percentual was gotten for concentration in the range 1141 and 1426 ppmMestradoMestre em Engenharia de Petróle
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Escoamento tubular e anular de fluido de perfuração com adição de poliacrilamida : efeito da redução de arraste
2017Co-Authors: João Crisosthomo De Queiroz NetoAbstract:Resumo: Este trabalho é um estudo experimental do fenômeno de redução de fricção no escoamento do fluido de perfuração salgado, contendo poliacrilamida hidrolisada em tubos de 1"(2,54 cm), 11/4"(3,18 cm), e no anular de 3/2"(7,62/5,08 cm). Neste estudo, analisou-se o comportamento reológico do fluido de perfuração com concentrações de poliacrilamida entre O e 7133 ppm, tendo sido verificado que o modelo reológico de Robertson-Stiff descreve melhor o comportamento reológico destes fluidos para a faixa de deformação pesquisada. Os resultados experimentais do escoamento turbulento em tubos e ânulos foram utilizados para analisar o fenômeno de redução de fricção, através do estudo da influência da geometria, concentração de poliacrilamida hidrolisada, degradação, etc, nos fatores de fricção dos fluidos. Correlações empíricas, tipo Blasius,foram desenvolvidas para escoamento turbulento do solvente através dos tubos e ânulo estudados. o fenômeno de redução de arraste foi observado e quantificado para o intervalo de concentração de poliacrilamida hidrolisada analisada. Além disso foi estudada a influência da degradação mecânica desse polímero do ponto de vista qualitativo. Foi observado que a funcionalidade da poliacrilamida hidrolisada como redutor de friccão ,para o fluido de perfuração salgado,limita-se à faixa de concentração de 713 a 2853 ppm.Além disso,maiores percentuais de redução de fricção foram obtidos para concentrações entre 1141 e 1426 ppm.Abstract: This work is a experimental study of drag reduction phenomenon in the salt drilling fluid that contains hydrolyzed Polyacrylamide and flows in 1", l1A"tubes and 3"/2"annulus, by turbulent flow. The rheological behavior of the salt drilling fluid with hydrolyzed Polyacrylamide in concentration between O and 7133 pp.m was analyzed. It was verified that the model proposed by Robertson-Stiff well deseribes the rheological behavior of the salt drilling fluids in the total range considered. Experimental results for the turbulent flow in the pipes and in the anulus were used to analyze the drag reduction phenomenon, by studying the influenee of the geometry, mechanical degradation, etc, in the friction factor of the drilling fluids. Empirical correlations Blasius type) were developed from experimental data for turbulent flow of the solvent (salt drilling fluid without hydrolyzed polyaerylamide) for tubes and annulus. The drag reduction phenomenon was observed and quantified for the analyzed concentration ranges of hydrolyzed polyaerylamide. Also, it was studied the influenee of this polymer's mechanical degradation from qualitative viewpoint It was noted that the function of hydrolyzed Polyacrylamide like drag reducer for salt drilling fluid ranges from 713 to 2853 ppm.However, the highest drag reduction percentual was gotten for concentration in the range 1141 and 1426 ppm
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Escoamento tubular e anular de fluido de perfuração com adição de poliacrilamida : efeito da redução de arraste
Universidade Estadual de Campinas. Faculdade de Engenharia Mecânica e Instituto de Geociências, 1993Co-Authors: João Crisosthomo De Queiroz NetoAbstract:Este trabalho é um estudo experimental do fenômeno de redução de fricção no escoamento do fluido de perfuração salgado, contendo poliacrilamida hidrolisada em tubos de 1"(2,54 cm), 11/4"(3,18 cm), e no anular de 3/2"(7,62/5,08 cm). Neste estudo, analisou-se o comportamento reológico do fluido de perfuração com concentrações de poliacrilamida entre O e 7133 ppm, tendo sido verificado que o modelo reológico de Robertson-Stiff descreve melhor o comportamento reológico destes fluidos para a faixa de deformação pesquisada. Os resultados experimentais do escoamento turbulento em tubos e ânulos foram utilizados para analisar o fenômeno de redução de fricção, através do estudo da influência da geometria, concentração de poliacrilamida hidrolisada, degradação, etc, nos fatores de fricção dos fluidos. Correlações empíricas, tipo Blasius,foram desenvolvidas para escoamento turbulento do solvente através dos tubos e ânulo estudados. o fenômeno de redução de arraste foi observado e quantificado para o intervalo de concentração de poliacrilamida hidrolisada analisada. Além disso foi estudada a influência da degradação mecânica desse polímero do ponto de vista qualitativo. Foi observado que a funcionalidade da poliacrilamida hidrolisada como redutor de friccão ,para o fluido de perfuração salgado,limita-se à faixa de concentração de 713 a 2853 ppm.Além disso,maiores percentuais de redução de fricção foram obtidos para concentrações entre 1141 e 1426 ppm.This work is a experimental study of drag reduction phenomenon in the salt drilling fluid that contains hydrolyzed Polyacrylamide and flows in 1", l1A"tubes and 3"/2"annulus, by turbulent flow. The rheological behavior of the salt drilling fluid with hydrolyzed Polyacrylamide in concentration between O and 7133 pp.m was analyzed. It was verified that the model proposed by Robertson-Stiff well deseribes the rheological behavior of the salt drilling fluids in the total range considered. Experimental results for the turbulent flow in the pipes and in the anulus were used to analyze the drag reduction phenomenon, by studying the influenee of the geometry, mechanical degradation, etc, in the friction factor of the drilling fluids. Empirical correlations Blasius type) were developed from experimental data for turbulent flow of the solvent (salt drilling fluid without hydrolyzed polyaerylamide) for tubes and annulus. The drag reduction phenomenon was observed and quantified for the analyzed concentration ranges of hydrolyzed polyaerylamide. Also, it was studied the influenee of this polymer's mechanical degradation from qualitative viewpoint It was noted that the function of hydrolyzed Polyacrylamide like drag reducer for salt drilling fluid ranges from 713 to 2853 ppm.However, the highest drag reduction percentual was gotten for concentration in the range 1141 and 1426 ppm
Ghasem D Najafpour - One of the best experts on this subject based on the ideXlab platform.
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treatment of pulp and paper mill wastewater by Polyacrylamide pam in polymer induced flocculation
Journal of Hazardous Materials, 2006Co-Authors: S S Wong, Tjoon Tow Teng, A L Ahmad, A Zuhairi, Ghasem D NajafpourAbstract:Abstract The flocculation performances of nine cationic and anionic Polyacrylamides with different molecular weights and different charge densities in the treatment of pulp and paper mill wastewater have been studied. The experiments were carried out in jar tests with the Polyacrylamide dosages range of 0.5–15 mg l −1 , rapid mixing at 200 rpm for 2 min, followed by slow mixing at 40 rpm for 15 min and settling time of 30 min. The effectiveness of the Polyacrylamides was measured based on the reduction of turbidity, the removal of total suspended solids (TSS) and the reduction of chemical oxygen demand (COD). Cationic polyacrlyamide Organopol 5415 with very high molecular weight and low charge density is found to give the highest flocculation efficiency in the treatment of the paper mill wastewater. It can achieve 95% of turbidity reduction, 98% of TSS removal, 93% of COD reduction and sludge volume index (SVI) of 14 ml g −1 at the optimum dosage of 5 mg l −1 . SVI values of less than 70 ml g −1 are found for all Polyacrylamide at their respective optimum dosage. Based on the cost evaluation, the use of the Polyacrylamides is economically feasible to treat the pulp and paper mill wastewaters. This result suggests that single-polymer system can be used alone in the coagulation–flocculation process due to the efficiency of the Polyacrylamide. Sedimentation of the sludge by gravity thickening with settling time of 30 min is possible based on the settling characteristics of the sludge produced by Organopol 5415 that can achieve 91% water recovery and 99% TSS removal after 30 min settling.
Tjoon Tow Teng - One of the best experts on this subject based on the ideXlab platform.
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Viscometric and Morphological Properties of Novel Magnesium Electrolyte–Polyacrylamide Composite Polymers in Aqueous Solution
Journal of Solution Chemistry, 2013Co-Authors: Imran Khan, Norhashimah Morad, Tjoon Tow TengAbstract:The viscometric properties of novel magnesium electrolyte–Polyacrylamide composite polymers in aqueous solutions were investigated using response surface methodology. Independent factors such as concentration of the magnesium electrolyte (magnesium chloride and magnesium hydroxide), concentration of Polyacrylamide, and the solution temperature were taken into account for viscometric modeling. Experiments were carried out according to central composite design, which includes factorial, central and axial points of the factors. Solution viscosity was taken as the response variable. A polynomial model for the viscometric properties was developed using ANOVA and non-linear regression analysis, and the R^2 values are 0.9995 and 0.9996 for aqueous solutions of magnesium chloride–Polyacrylamide (MCPAM) and magnesium hydroxide–Polyacrylamide (MHPAM) composite polymers, respectively. Two diagnostic plots have been constructed to validate the developed models for the natural logarithm of viscosity of aqueous solutions of the MCPAM and MHPAM composite polymers. The least-squares values show that the developed models are adequate for predictive purposes. TEM was used to investigate the morphological properties of MCPAM and MHPAM composite polymers. Magnesium chloride was impregnated into the Polyacrylamide chain while magnesium hydroxide was just adsorbed on the surface of the Polyacrylamide chain.
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treatment of pulp and paper mill wastewater by Polyacrylamide pam in polymer induced flocculation
Journal of Hazardous Materials, 2006Co-Authors: S S Wong, Tjoon Tow Teng, A L Ahmad, A Zuhairi, Ghasem D NajafpourAbstract:Abstract The flocculation performances of nine cationic and anionic Polyacrylamides with different molecular weights and different charge densities in the treatment of pulp and paper mill wastewater have been studied. The experiments were carried out in jar tests with the Polyacrylamide dosages range of 0.5–15 mg l −1 , rapid mixing at 200 rpm for 2 min, followed by slow mixing at 40 rpm for 15 min and settling time of 30 min. The effectiveness of the Polyacrylamides was measured based on the reduction of turbidity, the removal of total suspended solids (TSS) and the reduction of chemical oxygen demand (COD). Cationic polyacrlyamide Organopol 5415 with very high molecular weight and low charge density is found to give the highest flocculation efficiency in the treatment of the paper mill wastewater. It can achieve 95% of turbidity reduction, 98% of TSS removal, 93% of COD reduction and sludge volume index (SVI) of 14 ml g −1 at the optimum dosage of 5 mg l −1 . SVI values of less than 70 ml g −1 are found for all Polyacrylamide at their respective optimum dosage. Based on the cost evaluation, the use of the Polyacrylamides is economically feasible to treat the pulp and paper mill wastewaters. This result suggests that single-polymer system can be used alone in the coagulation–flocculation process due to the efficiency of the Polyacrylamide. Sedimentation of the sludge by gravity thickening with settling time of 30 min is possible based on the settling characteristics of the sludge produced by Organopol 5415 that can achieve 91% water recovery and 99% TSS removal after 30 min settling.
Anne-gwenaëlle Guezennec - One of the best experts on this subject based on the ideXlab platform.
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Degradation and transfer of Polyacrylamide based flocculent in sludge and industrial and natural waters
Environmental Science and Pollution Research, 2014Co-Authors: J. Guzzo, Anne-gwenaëlle GuezennecAbstract:Flocculants are widely used in numerous industrial domains (food-processing industry, mineral industries, chemical industries, water purification, wastewater treatment) to im-prove the solid/liquid separation in water-containing fine par-ticles. Thanks to the addition of flocculants, particles gather together and form flocs that improve the materials aggregation and wastewater clarification. At the molecular level, floccu-lants can be mineral polymers or natural organic polymers, but synthetic organic polymers constitute the main flocculants. Generally, they are anionic Polyacrylamides produced by polymerisation of acrylamide and the anionic co-monomer, the sodium acrylate. Monomers are only partially eliminated during Polyacrylamide preparation and remain at the state of tracks in the end product. According to Smith et al. (1996), the residual content in monomers varies between 0.05 and 5 %. Sodium acrylate presents no harmfulness like the polyacryl-amide (Stephens, 1991). However, as the acrylamide is con-sidered as a carcinogenic molecule, mutagen and reprotoxic (Molak, 1991), all Polyacrylamides (PAMs) used within the European Union are required to contain less than 0.1 % (w/w) of residual acrylamide (AMD) (European Parliament 1999) unless they are classified and labelled as a category 2 carcin-ogen (European Parliament 2006). More stringent thresholds are also set depending on additional regulations covering specific uses like, for example, when PAM-based flocculants are used for the treatment of drinking water (no more than 0.05 % of residual AMD). The potential risks on environment and health are thus linked to the spreading of acrylamide and Polyacrylamide degradation products in the natural environment. Two levels of spreading have to be considered: – The water: about 95 % of the polymers adsorb on the
S S Wong - One of the best experts on this subject based on the ideXlab platform.
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treatment of pulp and paper mill wastewater by Polyacrylamide pam in polymer induced flocculation
Journal of Hazardous Materials, 2006Co-Authors: S S Wong, Tjoon Tow Teng, A L Ahmad, A Zuhairi, Ghasem D NajafpourAbstract:Abstract The flocculation performances of nine cationic and anionic Polyacrylamides with different molecular weights and different charge densities in the treatment of pulp and paper mill wastewater have been studied. The experiments were carried out in jar tests with the Polyacrylamide dosages range of 0.5–15 mg l −1 , rapid mixing at 200 rpm for 2 min, followed by slow mixing at 40 rpm for 15 min and settling time of 30 min. The effectiveness of the Polyacrylamides was measured based on the reduction of turbidity, the removal of total suspended solids (TSS) and the reduction of chemical oxygen demand (COD). Cationic polyacrlyamide Organopol 5415 with very high molecular weight and low charge density is found to give the highest flocculation efficiency in the treatment of the paper mill wastewater. It can achieve 95% of turbidity reduction, 98% of TSS removal, 93% of COD reduction and sludge volume index (SVI) of 14 ml g −1 at the optimum dosage of 5 mg l −1 . SVI values of less than 70 ml g −1 are found for all Polyacrylamide at their respective optimum dosage. Based on the cost evaluation, the use of the Polyacrylamides is economically feasible to treat the pulp and paper mill wastewaters. This result suggests that single-polymer system can be used alone in the coagulation–flocculation process due to the efficiency of the Polyacrylamide. Sedimentation of the sludge by gravity thickening with settling time of 30 min is possible based on the settling characteristics of the sludge produced by Organopol 5415 that can achieve 91% water recovery and 99% TSS removal after 30 min settling.
