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Urszula Domanska - One of the best experts on this subject based on the ideXlab platform.
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separation of thiophene from heptane with ionic liquids
The Journal of Chemical Thermodynamics, 2013Co-Authors: Urszula Domanska, Elena Vadimovna Lukoshko, Marek KrolikowskiAbstract:Abstract Ionic liquids (ILs) are well known novel green solvents, which can be used for removing sulfur compounds from gasoline and diesel oils. Ternary (liquid + liquid) equilibrium data are presented for mixtures of {ionic liquid (1) + thiophene (2) + heptane (3)} at T = 298.15 K and ambient pressure to analyze the performance of the ionic liquid (IL) in the extraction of thiophene from the alkanes. Three pyrrolidinium-based ionic liquids have been studied: 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, ([BMPYR][FAP]), 1-butyl-1-methylpyrrolidinium tetracyanoborate, [BMPYR][TCB] and 1-butyl-1-methylpyrrolidinium tricyanomethanide, [BMPYR][TCM]. The results are discussed in terms of the selectivity and distribution ratio of separation of related systems. The immiscibility in the binary liquid systems of (thiophene + heptane) with all used ILs was observed. The [TCM]− anion in comparison with [TCB]− and [FAP]− anions shows much higher selectivity and slightly lower distribution ratio for extraction of thiophene. The non-random two liquid NRTL model was used successfully to correlate the experimental tie-lines and to calculate the phase composition error in mole fraction in the ternary systems. The average root mean square deviation (RMSD) of the phase composition was 0.047. The densities of [BMPYR][TCM] in temperature range from (298.15 to 348.15) K were measured. The data presented here show that the [BMPYR][TCM] ionic liquid can be used as an alternative solvent for the separation of thiophene from the Hydrocarbon Stream using solvent liquid–liquid extraction at ambient conditions.
Marek Krolikowski - One of the best experts on this subject based on the ideXlab platform.
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separation of thiophene from heptane with ionic liquids
The Journal of Chemical Thermodynamics, 2013Co-Authors: Urszula Domanska, Elena Vadimovna Lukoshko, Marek KrolikowskiAbstract:Abstract Ionic liquids (ILs) are well known novel green solvents, which can be used for removing sulfur compounds from gasoline and diesel oils. Ternary (liquid + liquid) equilibrium data are presented for mixtures of {ionic liquid (1) + thiophene (2) + heptane (3)} at T = 298.15 K and ambient pressure to analyze the performance of the ionic liquid (IL) in the extraction of thiophene from the alkanes. Three pyrrolidinium-based ionic liquids have been studied: 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, ([BMPYR][FAP]), 1-butyl-1-methylpyrrolidinium tetracyanoborate, [BMPYR][TCB] and 1-butyl-1-methylpyrrolidinium tricyanomethanide, [BMPYR][TCM]. The results are discussed in terms of the selectivity and distribution ratio of separation of related systems. The immiscibility in the binary liquid systems of (thiophene + heptane) with all used ILs was observed. The [TCM]− anion in comparison with [TCB]− and [FAP]− anions shows much higher selectivity and slightly lower distribution ratio for extraction of thiophene. The non-random two liquid NRTL model was used successfully to correlate the experimental tie-lines and to calculate the phase composition error in mole fraction in the ternary systems. The average root mean square deviation (RMSD) of the phase composition was 0.047. The densities of [BMPYR][TCM] in temperature range from (298.15 to 348.15) K were measured. The data presented here show that the [BMPYR][TCM] ionic liquid can be used as an alternative solvent for the separation of thiophene from the Hydrocarbon Stream using solvent liquid–liquid extraction at ambient conditions.
Elena Vadimovna Lukoshko - One of the best experts on this subject based on the ideXlab platform.
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separation of thiophene from heptane with ionic liquids
The Journal of Chemical Thermodynamics, 2013Co-Authors: Urszula Domanska, Elena Vadimovna Lukoshko, Marek KrolikowskiAbstract:Abstract Ionic liquids (ILs) are well known novel green solvents, which can be used for removing sulfur compounds from gasoline and diesel oils. Ternary (liquid + liquid) equilibrium data are presented for mixtures of {ionic liquid (1) + thiophene (2) + heptane (3)} at T = 298.15 K and ambient pressure to analyze the performance of the ionic liquid (IL) in the extraction of thiophene from the alkanes. Three pyrrolidinium-based ionic liquids have been studied: 1-butyl-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate, ([BMPYR][FAP]), 1-butyl-1-methylpyrrolidinium tetracyanoborate, [BMPYR][TCB] and 1-butyl-1-methylpyrrolidinium tricyanomethanide, [BMPYR][TCM]. The results are discussed in terms of the selectivity and distribution ratio of separation of related systems. The immiscibility in the binary liquid systems of (thiophene + heptane) with all used ILs was observed. The [TCM]− anion in comparison with [TCB]− and [FAP]− anions shows much higher selectivity and slightly lower distribution ratio for extraction of thiophene. The non-random two liquid NRTL model was used successfully to correlate the experimental tie-lines and to calculate the phase composition error in mole fraction in the ternary systems. The average root mean square deviation (RMSD) of the phase composition was 0.047. The densities of [BMPYR][TCM] in temperature range from (298.15 to 348.15) K were measured. The data presented here show that the [BMPYR][TCM] ionic liquid can be used as an alternative solvent for the separation of thiophene from the Hydrocarbon Stream using solvent liquid–liquid extraction at ambient conditions.
Ioannis G. Kevrekidis - One of the best experts on this subject based on the ideXlab platform.
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removal of alkanethiols from a Hydrocarbon mixture by a heterogeneous reaction with metal oxides
Industrial & Engineering Chemistry Research, 2003Co-Authors: James P. Nehlsen, Jay Benziger, Ioannis G. KevrekidisAbstract:Thiols can be selectively removed and recovered from a Hydrocarbon Stream by a heterogeneous reaction with oxides and hydroxides of Pb, Hg(II), and Ba. Alkanethiols of lengths n-C 6 , n-C 8 , and n-C 12 were found to react with powdered metal oxides to form stable thiolates that are solid at room temperature and insoluble in aqueous and organic solvents. The reaction converts the solid oxide phase into a solid thiolate phase, removing ions from the surface of the oxide, allowing the reaction to reach completion. The thiolates can be removed from the feed Stream by filtration. Once separated, the metal and the original thiols can be recovered by extraction with a dilute acid, yielding a metal salt in the aqueous phase and a hydrophobic layer of thiol. The choice of reactive metal oxides may be predicted from simple thermodynamic considerations.
Manuela Olaya Paschoal De ,mello - One of the best experts on this subject based on the ideXlab platform.
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Avaliação da utilização dos processos de hidrotratamento no petróleo extraído da Bacia de Campos
Niterói, 2017Co-Authors: Pereira, Beatriz Paes, Silva, Fernanda Galvão Rodrigues E, Manuela Olaya Paschoal De ,melloAbstract:As impurezas presentes nas correntes de petróleo, quando também presentes nos combustíveis, podem ocasionar uma série de inconvenientes, entre eles a instabilidade do produto final e corrosão, além de problemas do ponto de vista ambiental associados à emissão de compostos nocivos à atmosfera. Neste contexto, avaliando os processos presentes no refino de petróleo, a utilização do hidrotratamento catalítico (HDT) assume importância expressiva. O processo consiste no tratamento de uma corrente de hidrocarbonetos na presença de um catalisador e hidrogênio, com a finalidade de remover heteroátomos como enxofre, nitrogênio e oxigênio de hidrocarbonetos oleofínicos e aromáticos. Uma vez que as restrições das legislações ambientais apontam para a diminuição da concentração de partículas e gases poluentes emitidos de correntes de saída para a atmosfera, existe uma necessidade contínua no uso e na melhoria dos processos de HDT, a saber hidrodesnitrogenação (HDN), hidrodessulfurização (HDS) e hidrodesoxigenação (HDO). No presente trabalho, foi avaliada a utilização dos processos de hidrotratamento no petróleo extraído da Bacia de Campos. Para isso, foram realizados estudos de caso individuais das reações de HDS, HDN e HDO com a utilização de catalisadores monometálicos e bimetálicos a base de Ni-Mo e Co-Mo. Estes estudos também consideraram a influência de aditivos, dos suportes e o efeito da sulfetação nos catalisadores tendo em vista uma melhoria da atividade dessas reações. Por fim, essas informações foram integradas, de forma a propor as condições operacionais mais adequadas para a utilização dos processos simultaneamente no tratamento do petróleo da Bacia de Campos. Desta forma, foi proposto que o catalisador mais adequado seria o CoMoS suportado em gama-Al2O3, utilizando o fósforo como aditivo à uma faixa de temperatura de 200 a 370°C e pressão em torno de 4MPaImpurities present in oil Streams, when present in fuels too, can cause number of drawbacks, including instability of the final product and corrosion, as well as environmental problems associated with the emission of harmful compounds into the atmosphere. In this context, the use of catalytic hydrotreatment (HDT) is important in evaluating the processes involved in petroleum refining. The process consists of treating a Hydrocarbon Stream in the presence of a catalyst and hydrogen, in order to remove heteroatoms such as sulfur, nitrogen and oxygen from olefinic and aromatic Hydrocarbons. Since HDT processes, namely hydrodynitrogenation (HDN), hydrodesulphurization (HDS) and Hydrodeoxygenation (HDO). In the present work, the use of hydrotreatment processes in oil extracted from Campos Basin was evaluated. For this, individual case studies of the HDS, HDN and HDO reactions were carried out using monometallic and bimetallic catalysts based on Ni-Mo and Co-Mo. These studies also considered the influence of additives, carriers and the effect of sulfation on the catalysts in order to improve the activity of these reactions. Finally, this information was integrated in order to propose the most adequate operational conditions for the use of the processes simultaneously in the treatment of oil in the Campos Basin. Thus, it was proposed that the most suitable catalyst would be the CoMoS supported on Al2O3, using phosphorus as an additive at a temperature ranging from 200 to 370 ° C and a pressure of around 4MP