Synthesis of NaA-zeolite microspheres by conversion of geopolymer and their performance of Pb (II) removal

2021 ◽  
Vol 200 ◽  
pp. 105914
Author(s):  
Qiaoqiao Su ◽  
Yan He ◽  
Sijie Yang ◽  
Hengyu Wan ◽  
Shan Chang ◽  
...  
Keyword(s):  
Naa Zeolite

Structure, stability and permeation properties of NaA zeolite membranes for H2O/H2 and CH3OH/H2 separations

2018 ◽  
Vol 38 (1) ◽  
pp. 211-219 ◽  
Author(s):  
Sang Moon Lee ◽  
Nong Xu ◽  
John R. Grace ◽  
Anwu Li ◽  
C. Jim Lim ◽  
...  
Keyword(s):  
Structure Stability ◽  
Zeolite Membranes ◽  
Naa Zeolite ◽  
Permeation Properties

Forming of Zeolite/Carbon Composite Substrate Coated with Titania for Photocatalyst Decomposition of Organic Compound

2015 ◽  
Vol 659 ◽  
pp. 304-309
Author(s):  
Khemmakorn Gomonsirisuk ◽  
Thanakorn Wasanapiarnpong
Keyword(s):  
Activated Carbon ◽  
Composite Materials ◽  
Low Cost ◽  
Carbon Composite ◽  
Phenolic Resins ◽  
Soaking Time ◽  
Naa Zeolite ◽  
Composite Substrate ◽  
Zeolite Composite ◽  
High Absorption

Organic contaminated wastes water from petrochemical industries can be removed by adsorbent and photocatalyst. In this work, the degradation rate of phenol have been studied at different ratios of activated carbon/NaA zeolite composite materials coated with TiO2 photocatalyst which are easily to be fabricated into tubular shape by extrusion method. In addition, the foam-inserted composite can be floated on the surface of waste water for the higher phocatalyst activity. While the composite is the low cost adsorbent with high absorption and high ion exchange properties. In order to optimize the efficiency of material, the various ratios of activated carbon/NaA zeolite (3:1, 1:1 and 1:3) and amount of coated TiO2 on the specimen’s surface was studied by UV/Vis spectrophotometer which related to phenol concentration. Moreover the various amount of phenolic resins (10, 20, 30, 40 and 50 wt%) at different reduction firing temperatures (600 and 650 °C) with soaking time of 1, 2 and 3 hours affected to the compressive strength of samples. For the characterization, XRD is used to characterize the phase and SEM is used to provide the morphology of the prepared composite materials.

EVALUATION OF MODIFIED FLY ASH BASED NAA-ZEOLITE: EFFECT OF CRYSTALLINITY ON CO2 ADSORPTION CAPACITY

2019 ◽  
Vol 19 (3) ◽  
pp. 475-483 ◽  
Author(s):  
Muvumbu Jean-Luc Mukaba ◽  
Alechine Emmanuel Ameh ◽  
Chuks Paul Eze ◽  
Leslie Felicia Petrik
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Naa Zeolite ◽  
Co2 Adsorption Capacity ◽  
Modified Fly Ash

Microwave-Assisted Synthesis and Permeation Performance of NaA Zeolite Membrane by Secondary Growth Method

2014 ◽  
Vol 1053 ◽  
pp. 389-393
Author(s):  
Zhi Lin Cheng ◽  
Ying Ying Liu
Keyword(s):  
Gas Permeability ◽  
Knudsen Diffusion ◽  
Secondary Growth ◽  
Zeolite Membrane ◽  
Microwave Assisted Synthesis ◽  
Vapor Phase Transport ◽  
Zeolite Membranes ◽  
Synthesis Time ◽  
Naa Zeolite ◽  
Naa Zeolite Membrane

The highly intergrown NaA zeolite membranes on seeded α-Al2O3substrate were synthesized by microwave heating method. The preparation of seeds with the size of ca.120nm employed the vapor phase transport method (VPT). The XRD patterns indicated that the pure NaA zeolite membranes formed on the seeded α-Al2O3substrate for varied synthesis times. However, the peak intensity of NaA zeolite membrane with synthesis time of 50min obviously decreased, suggesting that the NaA membrane could take place the dissolution at that time. The SEM images indicated that the NaA zeolite membranes with synthesis time of 15-30min had a good integrity and consisted of highly intergrown zeolite crystals, but the NaA membrane with synthesis time of 50min appeared some large defects, further verifying the result of XRD pattern. The gas permeability showed that the maximum of H2/N2and H2/C3H8permselectivities attained 4.23 and 8.24, respectively, higher than those of the corresponding Knudsen diffusion. These results suggested that the diffusion of gases, at least in part, are affected by the pore size of zeolite and the function of molecular sieving can be embodied on the synthesized membrane.

scholarly journals Preparation and Characterization of NaA Zeolite Membranes and its Application for Removal of Heavy Metals

2013 ◽  
Vol 2 (3) ◽  
pp. 484-492 ◽  
Author(s):  
Najib Tijani ◽  
Hammou Ahlafi ◽  
Monique Smaihi ◽  
Abdeslam El Mansouri
Keyword(s):  
Heavy Metals ◽  
Zeolite Membranes ◽  
Naa Zeolite ◽  
Removal Of Heavy Metals
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