zeolite production
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2021 ◽  
Vol 8 (1) ◽  
pp. 20218111
Author(s):  
V. A. Snegirev ◽  
V. M. Yurk

The study examines the technology of processing fly ash from Troitskaya power plant for the production of zeolite. The paper presents the results of laboratory studies evaluating the suitability of fly ash from Troitskaya power plant for the production of zeolites and the development of the zeolite production process. Fly ash contains a small amount of heavy metals that can complicate processing, but contains a large amount of silicon oxide. The technology consists of high-temperature alkaline activation of fly ash and hydrochemical synthesis. The resulting powder has a specific surface area of 89.7 m2/g, determined by the BET method, and an average pore diameter of 0.345 μm. The static exchange capacity was 220 mg/g.


Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 246
Author(s):  
Agnieszka Kornas ◽  
Joanna E. Olszówka ◽  
Petr Klein ◽  
Veronika Pashkova

The paramount challenge of current chemical technology, including catalysis, is meeting the ecological sustainability requirements. The feasible production of zeolites is crucial because they constitute the principal group of heterogeneous catalysts. However, current zeolite manufacturing via hydrothermal synthesis is connected with considerable consumption of water resources, generation of wastewater, and significant equipment costs. Solvent-free strategies have attracted great attention as high-yielding methods for sustainable synthesis, particularly beneficial in terms of water consumption minimization and an outstanding increase in production due to the efficient use of synthesis space capacity. So far, the solvent-free preparation of numerous zeolite materials has been performed with the preceding grinding of reagents in a mortar. The proposed article describes recent advances in the application of automatized milling instead of manual work. Pretreatment automatization makes the entire process well-controlled, less sensitive to human factors, and is significantly more relevant to industrial scale-up. Moreover, the automatized milling activation unlocks opportunities for solvent-free synthesis from a broader range of common reagents, where the manual treatment is not efficient. Possibilities and limitations of the milling methods are discussed on the basis of a comprehensive analysis of parameter optimization, activation mechanisms, and applicability of common reagents used for zeolite production.


2020 ◽  
Vol 30 (11) ◽  
pp. 3093-3102
Author(s):  
Xu WANG ◽  
Hao SONG ◽  
Fen JIAO ◽  
Wen-qing QIN ◽  
Cong-ren YANG ◽  
...  

2020 ◽  
Vol 40 ◽  
pp. 101263
Author(s):  
Luis Monasterio-Guillot ◽  
Pedro Alvarez-Lloret ◽  
Aurelia Ibañez-Velasco ◽  
Alejandro Fernandez-Martinez ◽  
Encarnación Ruiz-Agudo ◽  
...  

2019 ◽  
Vol 21 ◽  
pp. 100624 ◽  
Author(s):  
Jorge D. Monzón ◽  
Maximiliano R. Gonzalez ◽  
Lucas E. Mardones ◽  
María S. Conconi ◽  
Andrea M. Pereyra ◽  
...  

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