当前位置: X-MOL 学术Appl. Clay. Sci. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Synthesis and characterization of zeolite LTA by hydrothermal transformation of a natural Algerian palygorskite
Applied Clay Science ( IF 5.6 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.clay.2020.105690
Lamia Dali Youcef , Alberto López-Galindo , Cristóbal Verdugo-Escamilla , Lala Setti Belaroui

Abstract A palygorskitic-rich Algerian clay (Sif Pal) has been selected as Si source to synthesize zeolite LTA through a hydrothermal treatment by using sodium aluminate. Sif Pal is activated under reflux using hydrochloric acid solutions at different concentrations (4, 6 and 7 mol.L−1) in a ratio of 50 g.L−1 and then analysed using XRD, SEM and XRF analysis. The selected product (PalH1) is mixed with NaOH solutions at different concentrations (1, 2, 3, 4 and 5 mol.L−1), diverse NaAl2O3 quantities (1, 2, 3 and 5 g) and analysed after several nucleation (1, 2, 3 and 5 h) and crystallization (6, 18 and 24 h) times to check the influence of these parameters on the synthesis of zeolite LTA. To obtain almost pure (> 98%) zeolite LTA, the better experimental conditions were: 3 mol.L−1 of NaOH solutions, 3 g of sodium aluminate, 3 h for nucleation and 24 h for crystallization.

中文翻译:

通过天然阿尔及利亚坡缕石的水热转化合成和表征沸石 LTA

摘要 以富含坡缕石的阿尔及利亚粘土(Sif Pal)为硅源,采用铝酸钠水热处理合成沸石LTA。使用比例为 50 gL-1 的不同浓度(4、6 和 7 mol.L-1)盐酸溶液回流活化 Sif Pal,然后使用 XRD、SEM 和 XRF 分析进行分析。所选产物 (PalH1) 与不同浓度(1、2、3、4 和 5 mol.L-1)、不同 NaAl2O3 量(1、2、3 和 5 g)的 NaOH 溶液混合,并在多次成核后进行分析( 1、2、3 和 5 小时)和结晶(6、18 和 24 小时)时间,以检查这些参数对沸石 LTA 合成的影响。为了获得几乎纯 (> 98%) 的沸石 LTA,较好的实验条件是:3 mol.L−1 NaOH 溶液,3 g 铝酸钠,
更新日期:2020-08-01
down
wechat
bug