The Experts below are selected from a list of 2208 Experts worldwide ranked by ideXlab platform

Eiji Iritani - One of the best experts on this subject based on the ideXlab platform.

  • Filtration behaviors of suspension of dual-sized submicron particles through semi-permeable microfiltration membrane
    Journal of the Taiwan Institute of Chemical Engineers, 2019
    Co-Authors: Eiji Iritani, Nobuyuki Katagiri, Yuuki Yamaoka
    Abstract:

    Abstract Particulate filtration behaviors such as the flux decline and particle retention by the membrane during the course of filtration were examined for dead-end constant pressure microfiltration of dilute suspension of dual-sized submicron polystyrene latex (PSL) particles through a semi-permeable membrane with a pore size larger than both particle sizes. The variation of rejection of both larger and smaller particles with the progress of filtration was approximated by the logistic equation. Our analysis was based on the cake filtration model accompanied by partial permeation of particles through the membrane. The model enabled us to evaluate the variation of the reciprocal filtration rate with the Filtrate Volume per unit effective membrane area, the relation between the Filtrate Volume and the filtration time, and the characteristic filtration curve frequently employed in the analysis of the blocking filtration law, on the basis of the data of temporal variation of particle retention. It was found that the retention of smaller particles was particularly promoted by the increase in the relative concentration of larger to smaller particles. It was also found that lower applied filtration pressure promoted the retention of both larger and smaller particles, resulting in the profound flux decline.

  • a review on modeling of pore blocking behaviors of membranes during pressurized membrane filtration
    Drying Technology, 2013
    Co-Authors: Eiji Iritani
    Abstract:

    Pore blocking is one of the critical factors governing the overall performance of membrane filtration systems. Pore blockage leads to a large resistance to filtration, giving rise to a sharp decline in the Filtrate flux rate under constant pressure conditions and a severe increase in the pressure for operation under constant flux conditions during membrane filtration. In membrane filtration work, blocking filtration laws are widely used to interpret the membrane fouling in membrane filtration. This article presents a systematic review on the theoretical developments of mechanistic models related to the blocking filtration laws for describing the membrane fouling in membrane filtration. Equations for constant pressure and constant flux separations in the interstices of a membrane and on the surface are reported for the Filtrate flow of Newtonian and power-law non-Newtonian fluids. The blocking filtration laws are useful also in the evaluation of the reduced pore size, maximum Filtrate Volume, and fouling p...

  • Determination of Pressure Dependence of Permeability Characteristics from Single Constant Pressure Filtration Test
    JOURNAL OF CHEMICAL ENGINEERING OF JAPAN, 2011
    Co-Authors: Eiji Iritani, Nobuyuki Katagiri, Yukiko Takaishi, Shogo Kanetake
    Abstract:

    The single constant pressure filtration test for dilute colloidal dispersions has been newly developed for easily determining the pressure dependence of the permeability characteristics such as the average specific cake resistance. The method made use of the gradual variation of the effective pressure drop across the filter cake with time generated by using the filter medium with a high medium resistance. The correlations between the average specific cake resistance and the effective pressure were obtained from the flux decline data. The data of the flux decline behavior obtained for the various values of the slurry concentration, applied pressure and medium resistance were largely merged by the normalized form of the reciprocal filtration rate vs. the Filtrate Volume. The validity of the method was confirmed not only for slurries of bentonite, Hara-Gairome clay, and polymethyl methacrylate (PMMA), but also for nanoparticle colloids of bovine serum albumin (BSA) and silica sol.

  • Analysis of clogging behaviors of diatomaceous ceramic membranes during membrane filtration based upon specific deposit
    AIChE Journal, 2009
    Co-Authors: Eiji Iritani, Nobuyuki Katagiri, Tomoaki Tadama, Hiroaki Sumi
    Abstract:

    Fouling behaviors in membrane filtration of dilute suspension of polystyrene latex (PSL) were examined under constant-pressure conditions using diatomaceous ceramic membranes which are semi-permeable to the PSL. Flux decline behaviors were evaluated in consideration of the effect of the solid permeation through the membrane. The conventional characteristic filtration equation was modified by applying the Kozeny-Carman equation to the Filtrate flow through the membrane pores. In the model, the porosity and specific surface area of the membrane were represented by unique functions of the solid deposit retained in the membrane pores. The variations of the filtration rate and Filtrate Volume with the filtration time were accurately described based upon the modified characteristic filtration equation. It was revealed that the extent of the membrane blocking per unit deposit load increased with the decrease in the pore size of the membrane and with decreasing pressure, but was little influenced by the suspension concentration. © 2009 American Institute of Chemical Engineers AIChE J, 2010

  • evaluation of compression permeability characteristics based on vacuum filtration test using nutsche equipped with floating disk
    Journal of The Society of Powder Technology Japan, 2001
    Co-Authors: Eiji Iritani, Yasuhito Mukai, Junhyung Cho
    Abstract:

    Vacuum filtration tests of Korean kaolin slurry were conducted under various filtration pressures using a nutsche equipped with a floating disk. The floating disk was used to determine the Filtrate Volume by its displacement. The average porosity of filter cake was obtained based on the principle of sudden reduction of filtration area during filtration. Compression-permeability cell data such as the local specific filtration resistance and the local porosity were evaluated as functions of the local solid compressive pressure on the basis of vacuum filtration data. The expression characteristics of slurry under relatively large expression pressure conditions were well evaluated based on the compression-permeability cell data determined from the vacuum filtration data under low pressure conditions. In addition, an approximate method has been developed for obtaining the permeability data on the basis of expression data.

Nurul Aimi Ghazali - One of the best experts on this subject based on the ideXlab platform.

  • Rheological and Filtration Performances of Rhizophora mucronata Tannin Water-Based Drilling Fluid
    Materials Today: Proceedings, 2019
    Co-Authors: A.h.m. Muhayyidin, Nurul Aimi Ghazali, N F Abu Bakar, Arina Sauki, Badrul Mohamed Jan, Wan Asma Ibrahim, F. Md Naimi
    Abstract:

    Abstract Rheological and filtration performances of water-based drilling fluid (WBDF) with tannin as deflocculant and fluid loss additive were conducted at high pressure and high temperature (HPHT). Different masses of tannin (0, 2, 4, 6 and 8 g) were added into WBDF and the prepared samples were tested at 3 different temperatures namely 250, 300 and 350 °F. Rheological properties including plastic viscosity (PV), yield point (YP), and gel strength (GS) were evaluated for pre and post aging processes. Filtration properties were measured based on the Filtrate Volume and mud cake thickness using low pressure low temperature (LPLT) and HPHT filter press. The rheological properties for post-aging process seem to be lower than the pre-aging except for 8 g tannin. The viscosity decreased by compensating attractive charges among the clay particles to flocculate. At higher temperature, tannin tends to absorb the extra heat and prevents water molecules from forming hydrogen. The filtration properties were also improved with low Filtrate Volume and thin mud cake. The optimum mass was achieved at 6 g of tannin. The rheological and filtration properties values of tannin were compared with commercial deflocculant (CD) and the differences were in range of 5-14 %.

  • Agarwood Waste as A New Fluid Loss Control Agent in Water-based Drilling Fluid
    International Journal of Science and Engineering, 2013
    Co-Authors: Azlinda Azizi, Nurul Aimi Ghazali, Arina Sauki, Mohd Shahrul Nizam Ibrahim, Ku Halim Ku Hamid, Tengku Amran Tengku Mohd
    Abstract:

    Agarwood has been used widely in various ways, including traditional medicine and art. The USAge of agarwood has grown broader in modern times include in therapeutic medicines and perfumery. In this paper the agarwood waste has been explored to be used as a fluid loss control agent to control fluid loss without affecting the drilling fluid rheological properties which are density, pH, viscosity, yield point and gel strength. Agarwood waste was used as an additive in the drilling fluid system due to its unique characteristic. Rheological and filtration measurements were performed on the formulated water-based drilling fluid. Formulations of a base solution of fresh water, sodium hydroxide, bentonite, barite, and xanthan gum were presented. The performance of the agarwood waste as the fluid loss control agent was compared with based fluid formulation and water-based drilling fluid with treating with conventional fluid loss control agent (starch). The Filtrate Volume of drilling fluid with agarwood waste was about 13 ml while for drilling fluid with conventional fluid loss control agent, starch gave 12 ml of Filtrate Volume after undergoing filtration test by using LPLT filter press. The performance of drilling fluid with agarwood was efficient as drilling fluid with starch. Doi: 10.12777/ijse.5.2.101-105 How to cite this article: Azizi, A., Ibrahim, M.S.N., Hamid, K.H.K., Sauki, A., Ghazali, N.A., Mohd, T.A.T. (2013). Agarwood Waste as A New Fluid Loss Control Agent in Water-based Drilling Fluid. International Journal of Science and Engineering, 5(2),101-105. Doi: 10.12777/ijse.5.2.101-105]

  • The Effect of Lemongrass as Lost Circulation Material (LCM) to the Filtrate and Filter Cake Formation
    Key Engineering Materials, 2013
    Co-Authors: Nurul Aimi Ghazali, Tengku Amran Tengku Mohd, Nur Hashimah Alias, Azlinda Azizi, A. A. Harun
    Abstract:

    Lost circulation is one of the most troublesome encountered in drilling due to uncontrolled flow of mud into the formation that likely to be caused of unsuccessful filter cake. The lost circulation material (LCM) is the additives that added to the drilling fluid to control loss of mud to the formation. In this research, the lemongrass was used as LCM. The objectives of this experiment are to investigate the effect of lemongrass as LCM to the Filtrate and filter cake thickness and to determine the effective size of lemongrass as LCM. The experiments were conducted to measure the Filtrate and filter cake thickness with different size and different based of drilling fluid. Low Pressure Low Temperature (LPLT) filter press is for water based mud (WBM) and High Pressure High Temperature (HPHT) filter press is for oil based mud (OBM) were used to perform the filtration process under static condition and constant filtration time which is 30 minutes. Both WBM and OBM are prepared four samples with three difference sizes of LCM and native mud. The sizes of lemongrass are 150 microns, 250 microns and 500 microns. After each experiment, the Filtrate Volume and filter cake thickness were determined to represent. The result shows that lemongrass able to perform a good LCM in both WBM and OBM based on Filtrate Volume and filter cake thickness. For WBM, the mud with LCM is lower Filtrate Volume than native mud which is less than 6.0 ml and for OBM, the mud with LCM is lower Filtrate Volume than native mud which is less than 5.0 ml. Both WBM and OBM show the thickness of filter cake obtained was in the range of 2 to 25 mm. The result also shows that the effective size of LCM is 150 micron due to less Filtrate Volume and filter cake thickness compare to other size of LCM which is 250 microns and 500 microns. The findings revealed that then lemongrass with the size of 150 microns is the suitable material to be used as LCM to replace conventional LCM.

Hanyi Zhong - One of the best experts on this subject based on the ideXlab platform.

  • Novel Acrylamide/2-Acrylamide-2-methylpropanesulfonic Acid/4-Vinylpyridine Terpolymer as an Anti-calcium Contamination Fluid-Loss Additive for Water-Based Drilling Fluids
    Energy & Fuels, 2017
    Co-Authors: Jie Cao, Lingwei Meng, Yuping Yang, Yuejun Zhu, Xiaoqiang Wang, Chengyan Yao, Mingbo Sun, Hanyi Zhong
    Abstract:

    A novel terpolymer of acrylamide (AM), 4-vinylpyridine (VP), and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) was synthesized through free radical polymerization and characterized by proton nuclear magnetic resonance, Fourier transform infrared spectroscopy, elemental analysis, and static light scattering measurement. The monomer ratio was shown to be the predominant factor to the fluid-loss control performance of this polymer in drilling fluids. The terpolymer under optimal polymerization conditions (PAAV) was prepared, and the dipolymer of AM and AMPS (PAA) was synthesized as a contrast sample. In an American Petroleum Institute (API) filtration test of bentonite-based mud with 10% CaCl2 contamination after a 16 h aging at 150 °C, mud with 1% PAAV maintained an API Filtrate Volume (FLAPI) of 4.8 mL, whereas mud with 1% PAA reached a FLAPI of 96.0 mL. The fluid-loss control mechanism of PAAV was investigated through adsorption experiments, ζ potential measurements, and particle size distribution anal...

Rosangela De Carvalho Balaban - One of the best experts on this subject based on the ideXlab platform.

  • Effect of ionic strength on solution and drilling fluid properties of ionic polysaccharides: A comparative study between Na-carboxymethylcellulose and Na-kappa-carrageenan responses
    Journal of Molecular Liquids, 2018
    Co-Authors: Liszt Y.c. Madruga, Paulo C.f. Da Câmara, Nívia Do Nascimento Marques, Rosangela De Carvalho Balaban
    Abstract:

    Abstract Natural polymers are widely used in different industries, mainly due to their hydrophilic features, which make it possible to solubilize them in water or absorb a large amount of it. Polysaccharides are the most widely used hydrophilic polymers, mainly because of their non-toxicity, biodegradability, compliance with environmental regulations and thickening behaviour in water. Knowledge of polymer performance in different aqueous media is essential to ensure optimal use in a desired application. In this study, the stability of sodium kappa-carrageenan and sodium carboxymethylcellulose stability was investigated in saline and basic aqueous media, as well as their applicability in drilling fluids. The ionic strength effects of the aqueous media containing Na+, Mg2+ and Ca2+ on the rheological properties of the polymer solutions were evaluated by varying the salt concentration, pH and temperature. The rheological properties and drilling fluid Filtrate Volume were evaluated by varying salt concentration and pH. The kappa-carrageenan solutions and drilling fluids were scarcely influenced by ion addition, at pH 7 to 10, even at higher salt concentrations, but highly influenced at pH > 11. On the other hand, carboxymethylcellulose solutions and their drilling fluids were more affected by the presence of salt and pH changes, with a greater decline in viscosity and increase in Filtrate Volume. This behaviour was interpreted as conformation adopted by the kappa-carrageenan chains in the presence of ions, indicating that this polymer is a good candidate for drilling fluids in oil well operations.

  • Effect of carboxymethylcellulose on colloidal properties of calcite suspensions in drilling fluids
    2018
    Co-Authors: Keila Regina Santana Fagundes, Railson Carlos Da Souza Luz, Fabio Pereira Fagundes, Rosangela De Carvalho Balaban
    Abstract:

    Abstract Drilling fluids are multicomponent systems used to aid the removal of cuttings from a borehole, and subject to a number of requirements to ensure a safe drilling operation. One of the most important is to form a low permeability cake on the walls of the hole penetrated by the bit, to avoid excessive Filtrate loss. To that end, carboxymethylcellulose (CMC) associated with calcite (CaCO3) can be used. In this paper, the effect of carboxymethylcellulose on the colloidal properties of calcite suspensions in brine was systematically evaluated by rheological properties, Filtrate Volume and zeta potential. Higher viscosity fluids, lower Filtrate loss and less negative zeta potential were obtained using small calcite particles with wide size distribution and CMC with high average molecular weight (Mw) and low average degree of substitution (DS), highlighting the importance of effective interactions between CMC and calcite to improve drilling fluid properties.

Shaohe Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Experimental Study on the Effect of Cation Exchange Capacity on Slurry Properties
    Geotechnical and Geological Engineering, 2018
    Co-Authors: Binkui Zhao, Dingqiang Mo, Jingyuan Wang, Shaohe Zhang
    Abstract:

    The slurry was prepared by pre-hydration method in this study. The relationship between the content of bentonite in slurry and its cation exchange capacity was studied by changing the content of bentonite. After the density, funnel viscosity, Filtrate Volume and rheological properties of slurry were tested, the influence of cation exchange capacity on slurry performance and filter-cake quality was analyzed. The results showed that: When the cation exchange capacity of slurry is small, with the increase of cation exchange capacity, the funnel viscosity, apparent viscosity and plastic viscosity of slurry increase significantly, the Filtrate Volume decreases gradually, and the overall performance improves significantly, which can effectively form filter cake and maintain the stability of excavation surface; while when the cation exchange capacity exceeds a certain value, the funnel viscosity, apparent viscosity and plastic viscosity of slurry increase significantly. With the increase of cation exchange capacity, the Filtrate Volume and viscosity of the slurry still increase, and the filter cake performance tends to be stable, but its overall performance does not rise but fall. Considering the influence of cation exchange capacity on the slurry performance parameters, when the cation exchange capacity of the slurry is controlled around 7.58 i.e. the solid phase content is between 6% and 7%, the slurry Filtrate Volume is relatively small, and it is easy to form thin and compact filter cake with its best comprehensive performance.