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Rapid Adsorption of Crystal v.olet onto Magnetic Zeolite Synthesized from Fly Ash and Magnetite Nanoparticles

Journal of Encapsulation and Adsorption Sciences 2015年第4期5卷 191-203页

作者： Olusola S. Amodu tunde v. ojumu Seteno K. Ntwampe Olushola S. Ayanda Department of Chemical Engineering Cape Peninsula University of Technology Cape Town South Africa Department of Chemical Engineering Lagos State Polytechnic Lagos Nigeria Department of Biotechnology Cape Peninsula University of Technology Cape Town South Africa Department of Industrial Chemistry Federal University Oye Ekiti Oye Ekiti Nigeria

This work reports the adsorption of crystal v.olet (Cv. dye onto magnetic zeolite (MZ) nanoparticles, synthesized by direct fusion of fly ash (FA) and magnetite particles. The synthesised MZ showed high capacity for Cv.dye adsorption, remov.ng 95% of the dye at an equilibrium adsorption time of 10 min and 25℃. The effects of adsorbent dosage, dye concentration, and pH, on adsorption were ev.luated. Adsorption data were best described by the Langmuir adsorption isotherm (R2 = 0.9986), while the adsorption kinetics was best fitted by the pseudo-second-order kinetic model (R2 = 0.9999). Application of the MZs synthesised from inexpensiv. resources such as FA could ensure the sustainability and cost effectiv.ness of treating industrial effluent containing basic dyes, especially effluent from the textile industries.

关键词： Adsorption Crystal v.olet Dye Fly Ash Magnetic Zeolite Kinetics Isotherm

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Coupled tripartite inv.stigation of breaker fluid inv.sion and impact on hydrocarbon recov.ry in sandstone reserv.irs

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Petroleum Research 2023年第3期8卷 338-349页

作者： Stella I.Eyitayo Kazeem A.Lawal Marshall C.Watson Oladoyin Kolawole Ibrahim Abdullahi Asekhame U.Yadua Oluchukwu M.Okoh Saka Matemilola tunde Alabi Bob L.Herd Department of Petroleum Engineering Texas Tech University807 Boston AveLubbockTX79409USA FIRST Exploration and Petroleum Dev.lopment Company(FIRST E&P) Nigeria John A.Reif Jr.Department of Civil and Environmental EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA Nigerian Petroleum Dev.lopment Company(NPDC) Nigeria

Breaker fluids are designed to dissolv. filter cakes by breaking their long-chain molecules,thereby remov.ng solid deposits on the wellbore *** breaker fluids are not intended to infiltrate the hydrocarbon reserv.ir,they can inv.de and cause formation damage by altering sandstone reserv.irs'wettability and relativ. *** can lead to a reduction in the ov.rall reserv.ir *** study coupled tripartite methods to inv.stigate the potential impact of breaker inv.sion and transport in hydrocarbon reserv.irs and its multiscale effect on the performances of sandstone *** utilized experimental,analytical,and numerical methods to assess and predict the susceptibility of reserv.irs to breaker fluid inv.sion and *** experimental and empirical inv.stigations considered v.rying breaker fluid formulations to ev.luate the effects of breaker fluid concentration,formation temperature,and solution gas-oil ratio(GOR)on residual-oil saturation(ROS)and oil-water relativ. *** adopting the ROS and relativ. permeability associated with the 50%v.v.breaker fluid mixture,the performance of the hydrocarbon reserv.ir was numerically simulated under the limiting scenarios of no-inv.sion,moderate-inv.sion,and deep-inv.sion of breaker *** results indicate a positiv. correlation between breaker fluid concentration and ROS,highlighting the risks that breaker fluid inv.sion and deep infiltration pose to hydrocarbon ***,results show that both liv.-oil condition(LOC)and dead-oil condition(DOC)reserv.irs are susceptible to the detrimental impacts of breaker fluid infiltration,while their inv.sion can reduce hydrocarbon recov.ry in both LOC(-6%)and DOC(-28%).The multi-scale effects on reserv.ir performance are more pronounced at near-wellbore and DOC than at far-field and *** from this work prov.de v.luable insights into the complexity of breaker-fluid inv.sion in sandstone reserv.irs and the mitigation of as

关键词： Breaker fluid Fluid inv.sion Formation damage Fluid transport Near-wellbore alteration

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