Hydrogen purification using natural zeolite‐loaded hydroxyethyl cellulose membrane

2021 ◽  
Author(s):  
Tuba Ünügül ◽  
Filiz Ugur Nigiz
Keyword(s):  
Natural Zeolite ◽  
Hydroxyethyl Cellulose ◽  
Cellulose Membrane ◽  
Hydrogen Purification

scholarly journals Preliminary Study for Detection of Hydrogen Peroxide Using a Hydroxyethyl Cellulose Membrane

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 7 ◽  
Author(s):  
Helena Vasconcelos ◽  
José M. M. M. de Almeida ◽  
Cristina Saraiva ◽  
Pedro A. S. Jorge ◽  
Luis Coelho
Keyword(s):  
Hydrogen Peroxide ◽  
Light Emission ◽  
Hydroxyethyl Cellulose ◽  
Cobalt Hydroxide ◽  
Cellulose Membrane ◽  
Food Control ◽  
High Concentration ◽  
Total Light ◽  
Preliminary Study

High concentration of biogenic amines (BA) is an indicator of deterioration of food and the determination of their concentration is an important method of food control. The hydrogen peroxide (H2O2) is a side product of the degradation of BAs by certain enzymes. It is presented an experimental technique grounded on chemiluminescence to measure small quantities of H2O2 with concentrations as low as 0.01%w/w up to 0.08%w/w. Luminol and cobalt hydroxide are added to hydroxyethyl cellulose to obtain an active membrane which will react with the sampling solution and the amount of total light emission is directly related to the H2O2 concentration.

scholarly journals Sweetening of Natural Gas through Hollow Silica Nanoparticles Embedded Hydroxyethyl Cellulose Membrane

2018 ◽  
Vol 15 (3) ◽  
pp. 256-262
Author(s):  
Mallikarjunagouda B. Patil ◽  
Amshumali M. K
Keyword(s):  
Gas Permeability ◽  
Operating Conditions ◽  
Hydroxyethyl Cellulose ◽  
Cellulose Membrane ◽  
Membrane Thickness ◽  
Membrane Gas Separation ◽  
Hollow Silica ◽  
Feed Pressure ◽  
Hollow Silica Nanoparticles ◽  
Sorption Effect

Membrane gas separation technique is a promising technique for separation of gases. Nanoparticles (NPs) of hollow spherical silica were synthesized by the hydrolysis and condensation of tetramethylorthosilicate (TMOS). The nanocomposite membranes were prepared by dispersing hollow silica in hydroxyethylcellulose (HEC) polymeric solution and were cast as membranes by solution casting-solvent evaporation procedure. The % loading of NP’s in membrane varied from 0.5 to 2 Wt. %. The effects of experimental parameters such as gas permeability and selectivity at constant pressure were measured for gas transport properties for the prepared membranes. Under constant operating conditions of feed pressure (4.0 MPa) and membrane thickness (50 μm), the CO2 permeability was determined to be in the range 1790-3620 Barrer for nanocomposite membrane from 0.5 to 2 Wt. %, while selectivity declined from 3.7 to 3.1 due to plasticization. This made us to come to the conclusion that the membrane has a double mode of sorption effect. The membranes were characterized with FTIR to confirm the formation of compound and with SEM to study the distribution of nanoparticles in the membrane matrix.

Crystal structure of natural zeolite offretite after carbon monoxide adsorption

1976 ◽  
Vol 144 (1-6) ◽  
pp. 32-41 ◽  
Author(s):  
W. J. Mortier ◽  
J. J. Pluth ◽  
J. V. Smith
Keyword(s):  
Crystal Structure ◽  
Carbon Monoxide ◽  
Natural Zeolite ◽  
Carbon Monoxide Adsorption

Study on adsorption of Cr (VI) with natural zeolite modified by hydrotalcite

2013 ◽  
Author(s):  
Rongxiang Liu ◽  
Huanzhen Zhang
Keyword(s):  
Natural Zeolite

Microstructures and Properties of WC/Natural Zeolite Composites

2012 ◽  
Vol 27 (2) ◽  
pp. 129-133
Author(s):  
Yi-Fan ZHENG ◽  
Na ZHAO ◽  
Jie ZHANG ◽  
Xiao-Ye YU ◽  
Wei-Min MO
Keyword(s):  
Natural Zeolite

ION Exchange Characterisation of Modified Zeolite

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2269-2272 ◽  
Author(s):  
Š Cerjan-Stefanovic ◽  
M. Kaštelan-Macan ◽  
T. Filipan
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Natural Zeolite ◽  
Deionized Water ◽  
Isomorphous Substitution ◽  
Waste Waters ◽  
Modified Zeolite ◽  
Water Drinking

Isomorphous substitution of phosphorus into a natural zeolite affords the possibility to change the overall framework charge from negative to positive. The substances so created should be used for purification of waste waters. The work describes the preparation of phosphated zeolite, their characterisation and examples of their anion exchange of NO3 on observed in deionized water, drinking water and in the solution containing varying amounts of nitrate.

Life Time Improvement of Hierarchically Structured SAPO-34 Nanocatalyst in MTO Reaction via Applying Clinoptilolite, Investigating of Composite Design via RSM

2020 ◽  
Vol 23 ◽  
Author(s):  
Reza Yazdanpanah ◽  
Eshagh Moradiyan ◽  
Rouein Halladj ◽  
Sima Askari
Keyword(s):  
Surface Area ◽  
Natural Zeolite ◽  
Coke Formation ◽  
Life Time ◽  
Weight Percent ◽  
Light Olefins ◽  
Bet Surface Area ◽  
Relative Crystallinity ◽  
Mto Reaction ◽  
The Common

Aim and Objective: The research focuses on recent progress in the production of light olefins. Hence, the common catalyst of the reaction (SAPO-34) deactivates quickly because of coke formation, we reorganized the mechanism combining SAPO-34 with a natural zeolite in order to delay the deactivation time. Materials and Methods: The synthesis of nanocomposite catalyst was conducted hydrothermally using experimental design. Firstly, Clinoptilolite was modified using nitric acid in order to achieve nano scaled material. Then, the initial gel of the SAPO-34 was prepared using DEA, aluminum isopropoxide, phosphoric acid and TEOS as the organic template, sources of Aluminum, Phosphor, and Silicate, respectively. Finally, the modified zeolite was combined with SAPO-34's gel. Results: 20 different catalysts due to D-Optimal design were synthesized and the nanocomposite with 50 weight percent of SAPO-34, 4 hours Crystallization and early Clinoptilolite precipitation showed the highest relative crystallinity, partly high BET surface area and hierarchical structure. Conclusion: Different analysis illustrated the existence of both components. The most important property alteration of nanocomposite was the increment of pore mean diameters and reduction in pore volumes in comparison with free SAPO-34. Due to low price of Clinoptilolite, the new catalyst develops the economy of the process. Using this composite, according to formation of multi-sized pores located hierarchically on the surface of the catalyst and increased surface area, significant amounts of Ethylene and Propylene, in comparison with free SAPO-34, were produced, as well as deactivation time that was improved.

COPPER (Cu2+) REMOVAL FROM WATER USING NATURAL ZEOLITE FROM GEDANGSARI, GUNUNGKIDUL, YOGYAKARTA

2015 ◽  
Vol 2 (2) ◽  
Author(s):  
Wahyu Wilopo ◽  
Septiawan Nur Haryono ◽  
Doni Prakasa Eka Putra ◽  
I Wayan Warmada ◽  
Tsuyoshi Hirajima
Keyword(s):  
Waste Water ◽  
Economic Growth ◽  
Heavy Metals ◽  
Natural Zeolite ◽  
Adsorption Equilibrium ◽  
Waste Water Treatment ◽  
Batch Test ◽  
Maximum Capacity ◽  
Geological Materials ◽  
Langmuir Adsorption

Development of indusrialization and urbanization not only increase economic growth but also contribute to the environmental degradation, especially contamination of heavy metals in water. In other side, there are many geological materials have capability to immobilize heavy metals. Therefore, the objective of this research is to know the maximum capacity of natural zeolite from Trembono area, Gunung Kidul regency to immobilize copper (Cu2+) from water and to understand their mechanism. This experiment was carry out by a batch test. The result showed that the maximum capacity of zeolite to immobilize Cu (qmax) is 63,69 mmolCu/kg Zeolite according to Langmuir adsorption equilibrium model. In addition, the capability to immobilize Cu will increases due to decreasing the grain size. The result of this research can be used as an alternative for waste water treatment, especially Cu. Keywords: Removal, copper (Cu2+), natural zeolite, Langmuir isotherm

Porous SBA-15/cellulose membrane with prolonged anti-microbial drug release characteristics for potential wound dressing application

Cellulose ◽  
2020 ◽  
Vol 27 (5) ◽  
pp. 2737-2756
Author(s):  
Zhi Shen ◽  
Ning Cai ◽  
Yanan Xue ◽  
Bo Yu ◽  
Jianzhi Wang ◽  
...  
Keyword(s):  
Drug Release ◽  
Wound Dressing ◽  
Cellulose Membrane
Sign in / Sign up

Export Citation Format

Share Document