Mordenite zeolite is considered a molecular sieve because of its adsorbent material characteristics used in the industry as a gas separator. High Si/Al ratios of this zeolitic material in its crystal lattice provide high thermal stability in the structure. To minimize the production costs, this work synthesized the mordenite zeolite in absence organic template (high costs of production). For this purpose, rice husk ash (silicon source) was used from a thermoelectric plant that uses biomass for power generation under the “Moving Grade Reactor” method and metakaolin (aluminium source) derived from the construction. To obtain the zeolitic material, an alkaline treatment with sodium hydroxide and deionized water was required. Different Si/Al ratios (5, 10, 15, and 20) were used to evaluate the highest efficiency in adsorption capacity. The textural properties of mordenite as a function of specific surface area ranged from 314 to 347 m²/g, with micropore volume 0.198–0.279 cm³/g with average pore diameter ranging from 5.9 to 6.2 Å. N₂ adsorption/desorption isotherms obtained for mordenite presented type IV hysteresis, characteristic of microporous materials. X-ray diffraction showed crystalline phases of mordenite zeolite, mostly. The FTIR reinforces the success of mordenite synthesis by the vibration bands corresponding to the zeolitic material. TGA revealed water desorption and absence of an organic director. The mean cation-exchange capacity values ranged from 1.10 to 1.78 meq/g indicating a 62% increase of 20-mordenite zeolite compared to 5-mordenite in the zeolitization process. This result is satisfactory and promising for the use of mordenite as adsorbent material.

中文翻译：

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以偏高岭土和稻壳灰为铝和硅来源的丝光沸石的合成与表征

丝光沸石被​​认为是分子筛，因为它的吸附材料特性在工业上用作气体分离器。该沸石材料在其晶格中的高Si / Al比在结构中提供了高热稳定性。为了使生产成本最小化，这项工作在没有有机模板的情况下合成了丝光沸石（生产成本高）。为此，从热电厂使用稻壳灰（硅源），该热电厂使用“移动级反应器”方法利用生物质发电，并从该建筑中提取偏高岭土（铝源）。为了获得沸石材料，需要用氢氧化钠和去离子水进行碱处理。使用不同的Si / Al比（5、10、15和20）来评估最高的吸附容量效率。² / g，微孔体积为0.198-0.279 cm ³ / g，平均孔径为5.9至6.2Å 。对于丝光沸石获得的N ₂吸附/解吸等温线呈现IV型滞后，这是微孔材料的特征。X射线衍射显示出丝光沸石的晶相大部分。FTIR通过对应于沸石材料的振动带增强了丝光沸石合成的成功。TGA显示水解吸并且不存在有机指向矢。平均阳离子交换容量值在1.10至1.78 meq / g的范围内，表明在沸石化过程中20丝光沸石比5丝光沸石增加了62％。该结果对于使用丝光沸石作为吸附材料是令人满意的和有希望的。