Pervaporation performance comparison of hybrid membranes filled with two-dimensional ZIF-L nanosheets and zero-dimensional ZIF-8 nanoparticles

Liu, Guanhua; Jiang, Zhongyi; Cao, Keteng; Nair, Sankar; Cheng, Xuanxuan; Zhao, Jing; Gomaa, Hassan; Wu, Hong; Pan, Fusheng

doi:10.1016/j.memsci.2016.09.064

Cited by 197 publications

(70 citation statements)

References 70 publications

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“…Figure, the thickness of the silica membrane estimated to be ~1μm. It is thicker than CTP techniques of calcination form our previous work (around 470 nm) [9]. This difference is caused by the process of calcination on RTP conducted in this study is shorter than the CTP method conducted by [9].…”

Section: Si -Oh + Ho -Si Si -O -Si + H 2 O B Characterization Of Xercontrasting

confidence: 58%

“…It is thicker than CTP techniques of calcination form our previous work (around 470 nm) [9]. This difference is caused by the process of calcination on RTP conducted in this study is shorter than the CTP method conducted by [9]. In addition, the RTP process does not use heating rate and cooling rate as it does in the CTP method.…”

Section: Si -Oh + Ho -Si Si -O -Si + H 2 O B Characterization Of Xermentioning

confidence: 59%

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Silica Membranes for Wetland Saline Water Desalination: Performance and Long Term Stability

Elma

Riskawati

Marhamah

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. In this study, silica thin film pH=6 (precursor TEOS:tetraethyl ortosilicate) developed from sol gel process and deposited (2 layers) directly onto alumina substrate(tubular support with 100 nm pore size) without depositing interlayer (interlayer-free).Then, the desalination process via pervaporation was applied to test the membranesperformanceusing artificial saline water and wetland saline water. Results show the decrease of water flux (1.9 to 1.43 kg m -2 h -1 ) and salt rejection(97 to 95%) when using artificial salty water (0-7.5 wt%) and the long-term stability of silica membrane was stable at 1.7 kg m -2 h -1 for over 100 hours when using wetland saline water as a feed.Keywords: silica membranes; desalination; sol gel process, water flux and salt rejection. IntroductionLiterature reported that water is the basic needs of human living.Unfortunately, there is only 3% of water available as fresh water, the remaining 97% of watercontain salt. The World Health Organization (WHO) also said that there is more than 15% of the world's population does not have access to drinking water.One way to overcome the problem of accessing the clean water is by applying the appropriate membrane technology. Water desalination is one part of the technology to adapt. In addition, desalination has an environmentally friendly, energy-efficient, low operating cost and minimal use of chemicals. So this method becomes an interesting option for further investigation.Based on solubility or salt content in water, salty water can be grouped into three types (brackish water, saline water and brine water). Fresh water, brackish water, saline (sea) water and brine water has a salinity of less than 0.5, between 0.5 -17, 35 and above 35 ppt (part per thousand), respectively. Desalination is a process for reducing minerals dissolved in seawater into fresh water with a maximum concentration of 500 ppm. Membrane technology is a part of desalination process that mostly chosen due to its high efficiency, ease of operation, energy-saving and non-chemical. This technology has been widely applied to various processes such as gas separation, pervaporation, ion exchange membranes, membrane reactors and wastewater treatment. This technology has also several advantages, such as: enable to separate within specific chemical molecules, enable to operate at low temperatures, low energy consumption andfriendly environment. In addition, separation technique using membranes can run continuously and do not require much energy and the addition of chemicals (coagulant andflocculants). Sol gel process is a simple way to separate the molecules.

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Section: Si -Oh + Ho -Si Si -O -Si + H 2 O B Characterization Of Xercontrasting

confidence: 58%

Section: Si -Oh + Ho -Si Si -O -Si + H 2 O B Characterization Of Xermentioning

confidence: 59%

Silica Membranes for Wetland Saline Water Desalination: Performance and Long Term Stability

Elma

Riskawati

Marhamah

2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…(18)). The penetration of Ethanol through the selective membrane is described by the following equation: (18) The concentration of Ethanol in the permeate side (y Ethanol ) must be determined by trial and error method. In this method, an initial value for y Ethanol is guessed.…”

Section: Fem Simulationmentioning

confidence: 99%

“…Thirdly, the zeolitic structures are more chemically stable and tolerant to severe separation conditions such as strong solvents or low pH solutions. Last but not least, zeolites are thermally stable up to high temperatures of 1000°C [17,18].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Evaluation, Modeling and Simulation of Nano-Pore NAA Zeolite Membranes

Kazemimoghadam¹

2017

ANTJ

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Section: Introductionmentioning

confidence: 99%

Synthesis, Evaluation, Modeling and Simulation of Nano-Pore Naa Zeolite Membranes

Mansoor¹,

Zahra²

2017

IJASE

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Zeolite membranes have uniform and molecular-sized pores that separate molecules based on the differences in the molecules' adsorption and diffusion properties. Strong electrostatic interaction between ionic sites and water molecules (due to its highly polar nature) makes the zeolite NaA membrane very hydrophilic. Zeolite NaA membranes are thus well suited for the separation of liquid-phase mixtures by pervaporation. In this study, experiments were conducted with various Ethanol-water mixtures (1-20 wt. %) at 25 °C. Total flux for Ethanol-water mixtures was found to vary from 0.331 to 0.229 kg/m 2 .h with increasing Ethanol concentration from 1 to 20 wt.%. Ionic sites of the NaA zeolite matrix play a very important role in water transport through the membrane. These sites act both as water sorption and transport sites. Surface diffusion of water occurs in an activated fashion through these sites. The precise Nano-porous structure of the zeolite cage helps in a partial molecular sieving of the large solvent molecules leading to high separation factors. A comparison between experimental flux and calculated flux using Stephan Maxwell (S.M.) correlation was made and a linear trend was found to exist for water flux through the membrane with Ethanol concentration. A comprehensive model also was proposed for the Ethanol/water pervaporation (PV) by Finite Element Method (FEM). The 2D model was masterfully capable of predicting water concentration distribution within both the membrane and the feed side of the pervaporation membrane module.

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Pervaporation performance comparison of hybrid membranes filled with two-dimensional ZIF-L nanosheets and zero-dimensional ZIF-8 nanoparticles

Cited by 197 publications

References 70 publications

Silica Membranes for Wetland Saline Water Desalination: Performance and Long Term Stability

Silica Membranes for Wetland Saline Water Desalination: Performance and Long Term Stability

Synthesis, Evaluation, Modeling and Simulation of Nano-Pore NAA Zeolite Membranes

Synthesis, Evaluation, Modeling and Simulation of Nano-Pore Naa Zeolite Membranes

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