SINTESIS ZEOLIT A BERBAHAN DASAR ABU TERBANG (FLY ASH) LIMBAH PT. INDONESIA CHEMICAL ALUMINA (ICA) MENGGUNAKAN METODE ALKALI HIDROTERMAL (SYNTHESIS OF ZEOLITE A BASE ON FLY ASH WASTE PT. INDONESIA CHEMICAL ALUMINA (ICA) USING HYDROTHERMAL ALKALINE METHOD)

Indonesian Journal of Pure and Applied Chemistry Pub Date : 2022-04-30 DOI:10.26418/indonesian.v5i1.53072

Rizky Fitri Febrianti, Titin Anita Zahara, Adhitiyawarman Adhitiyawarman

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引用次数: 1

Abstract

Fly ash is one of the combustion residues from coal-fired power plants which is produced in large quantities. The main elemental composition of fly ash is silica and alumina with content of 48.055% and 14.653%, respectively. This study aims to determine the characteristics of zeolite A synthesized from fly ash with various ratios of SiO2 and Al2O3. Zeolite A was synthesized using the alkaline hydrothermal method by varying the Si/Al molar ratio of 0.8 1 and 1.2. The initial process begins with the leaching process of fly ash waste and is followed by alkaline smelting. Furthermore, zeolite A was synthesized by adding sodium silicate and sodium aluminate to form a white gel. These steps were followed by a hydrothermal process using a hydrothermal autoclave at a temperature of 100֯C for 5 hours. Qualitative results on XRD showed that zeolite A synthesized at a ratio of Si/Al 1,2 had a 2ϴ position closer to standard zeolite A, which was seen based on the highest peaks at 2ϴ=12,420, 16,070, 20,360, 21,590, 23,960, 26,070, 27,080, 29,910, 32,500, 41,480, 44,090, 52,540, 54,230 and 66,660 and the structure formed is in cubic form with a crystallinity of 76.36%. Analysis using XRF showed that the Si/Al 1.2 ratio was the best for the formation of zeolite A. In this variation the silica and alumina content increased by 54.412% and 35.054%, respectively

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粉煤灰是燃煤电厂大量产生的燃烧残余物之一。粉煤灰的主要元素组成为二氧化硅和氧化铝，含量分别为48.055%和14.653%。本研究旨在测定不同SiO2和Al2O3配比的粉煤灰合成A型沸石的性能。以硅铝摩尔比为0.8和1.2为条件，采用碱性水热法合成了A型沸石。初始工艺从粉煤灰废料的浸出工艺开始，然后进行碱法冶炼。在此基础上，通过添加硅酸钠和铝酸钠形成白色凝胶合成了A型沸石。在这些步骤之后，使用热液高压灭菌器在100֯℃下进行热液处理5小时。XRD定性分析结果表明，以Si/Al 1,2的比例合成的A沸石的2ϴ位置更接近标准沸石A，其峰值为2ϴ=12,420、16,070、20,360、21,590、23,960、26,070、27,080、29,910、32,500、41,480、44,090、52,540、54,230和66,660，形成的结构为立方结构，结晶度为76.36%。XRF分析表明，Si/Al比值为1.2时最有利于a型沸石的形成，sio2和氧化铝含量分别增加了54.412%和35.054%

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Indonesian Journal of Pure and Applied Chemistry

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