Synthesis and characterization of 13X zeolite from low-grade natural kaolin

Ma, Yunan; Yan, Chunjie; Alshameri, Aref; Qiu, Xiumei; Zhou, Chunyu; li, Dan

doi:10.1016/j.apt.2013.08.002

Cited by 128 publications

(64 citation statements)

References 26 publications

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“…[25,26] Thus, before the aluminosilicate gel is obtained, QHS activation must be achieved by alkaline fusion. [27] In the fused QHS, one zeolitic phase and NaAlSiO 4 formed, but the quartz phase remained. The removal of quartz impurities relies on a modified liquid-transport, gravity-based, spatial separation technique, which was first introduced by the Holmes group.…”

Section: Synthesis Strategymentioning

confidence: 98%

“…[9,10] Some researchers handled this problem through the dispersion of AMP on various supports such as Al 2 O 3 , [11] organic polymers, [12] and zirconium phosphate. [13] Hexagonal mesoporous silica materials, including MCM-41 and SBA-15, 1 TEM, 27 Al and 31 P magic-angle spinning (MAS) NMR spectroscopy, and N 2 adsorption/desorption, which indicated that the AMP was immobilized in the mesoporous structure of Al-MCM-41. The adsorption capacity of the final product for the removal of cesium ions in solution was also investigated.…”

Section: Introductionmentioning

confidence: 99%

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Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

et al. 2015

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Ordered hexagonal mesoporous aluminosilicate matrix (Al-MCM-41) with incorporated ammonium molybdophosphate (AMP) was successfully synthesized by a one-pot synthesis method with natural clay from low-grade potash ores of Qinghai salt lake as the silica and aluminum source. We introduced a modified "liquid-phase transport" step, which allowed the use of impure natural clay as a starting material to directly produce pure product without sedimentation pretreatment. The resultant product was characterized by X-ray fluorescence (XRF) spectroscopy, FTIR spectroscopy, XRD,

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Section: Synthesis Strategymentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

et al. 2015

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“…Peningkatan luas efektif ini dikarenakan terjadinya mekanisme pembersihan zat-zat pengotor yang menyumbat permukaan material selama proses aktivas serta terjadinya dealuminasi maupun desilikonisasi [10,11]. Semakin tinggi suhu aktivasi yang digunakan maka semakin banyak atom Al dan Si yang terdesorpsi sehingga semakin banyak jumlah ion yang dapat diserap untuk menyeimbangkan kembali muatan neto dalam kerangka material [12][13][14][15][16]. Fenomena ini sesui dengan spektrum FTIR yang menunjukkan semakin tinggi suhu aktivasi maka puncak FTIR material semakin rendah.…”

Section: Development Of Sorbent Materials Based On Zeolite and Clay Aunclassified

Pengembangan Material Sorben Berbasis Zeolite dan Clay Alam se-bagai Media Desalinasi Air Laut

et al. 2017

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ABSTRAKTelah dikembangkan material pengikat ion (material sorben) berbasis material alam sebagai media desalinasi air laut. Material alam yang digunakan berupa clay, tanah, karang dan zeolite. Aktivasi termal dilakukan untuk meningkatkan sorpsibilitas material. Sorpsibilitas material terhadap ion-ion garam air laut dinyatakan dengan efisiensi reduksi. Efisiensi reduksi tertinggi sebesar 4% diperoleh dari aktivasi tanah pada suhu 600 °C dan zeolite pada suhu 200 °C. Efisiensi reduksi meningkat secara liniar dengan penambahan dosis material sorben. Sorpsibilitas zeolite dan tanah darat dapat ditingkatkan melalui aktivasi termal pada suhu yang relatif rendah sehingga berpotensi dijadikan sebagai low cost material sorben untuk desalinasi air laut. PENDAHULUANAir bersih merupakan salah satu kebutuhan manusia yang utama. Pertambahan jumlah penduduk diikuti dengan peningkatan berbagai kegiatan industri dan pertanian menyebabkan kebutuhan air bersih meningkat drastis. Di sisi lain, produksi limbah air dan potensi pencemaran air bersih akibat limbah industri, limbah pertanian dan limbah rumah tangga juga meningkat. Jika keadaan ini terus berlangsung tanpa diikuti penanganan yang tepat, maka ketersediaan air bersih semakin lama akan semakin berkurang.Indonesia mempunyai sumber daya air laut yang melimpah. Dua pertiga luas wilayah Indonesia berupa lautan, sehingga jika dikelola lebih lanjut dapat dijadikan sebagai reservoir air bersih. Teknik mengolah air laut menjadi air bersih dikenal dengan istilah desalinasi air laut. Berbagai teknologi desalinasi telah dikembangkan dan digunakan untuk menambah persediaan air bersih dunia seperti multi-stage flash distillation (MSF), multiple effect distillation (MED), vapor compression distillation (VCD), reverse osmosis (RO), electrodialysis (ED), dan freezing [1][2][3]. Secara garis besar teknologi tersebut dikelompokkan menjadi dua kategori yaitu berbasis termal dan berbasis membran. Teknologi desalinasi berbasis membran menghasilkan air bersih dengan cara pemisahan molekul, sedangkan teknologi berbasis termal bekerja dengan memecah ikatan antara molekul air melalui proses distilasi maupun kristalisasi. Kendala utama dari kedua teknologi ini adalah diperlukan biaya yang sangat tinggi dalam pengoperasiannya. Selain itu, teknologi di Indonesia saat ini masih sangat terbatas sehingga belum mampu mewujudkan teknologi secanggih itu. Perlu dikembangkan teknologi desalinasi yang lebih sederhana, lebih ekonomis serta mempunyai biaya pengadaan dan perawatan yang relatif lebih terjangkau.Salah satu teknologi yang dapat dijadikan pilihan untuk dikembangkan sebagai teknologi ekodesalinasi air laut adalah desalinasi menggunakan material pengikat ion. Sistem desalinasi ini tidak bergantung pada cuaca seperti halnya teknologi desalinasi menggunakan cahaya matahari sebagai sumber energi termal. Sistem desalinasi ini tidak menggunakan teknologi membran seperti pada proses RO dan juga tidak memerlukan energi listrik sepertihalnya pada proses ED. Proses desalinasi menggunakan material pengikat molek...

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“…Zeolite synthesis is usually conducted in hydrothermal conditions in an alkaline environment (e.g., NaOH solution). Zeolites can be successfully obtained from different natural raw materials [1][2][3][4]. Moreover, various manufacturing and agro wastes have been studied as a starting material in synthesizing zeolite [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

Grela

Łach

Bajda

et al. 2018

J Therm Anal Calorim

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Currently, there has been a growing interest of zeolite materials for industrial and scientific purpose. Synthetic zeolites are more often used than natural ones due to its higher purity and more uniform particle sizes. Numerous investigations are conducted in searching of inexpensive raw materials suitable for zeolite synthesis. Moreover, the temperature, pressure, times and SiO 2 /Al 2 O 3 ratio are the most important parameters which play key roles in the synthesis processes. Due to such a large number of factors that affect the process, zeolite synthesis has been undergoing constant development. Nowadays, researchers focus on the methods of synthesizing zeolites at ambient temperature and pressure. Metakaolin and tuff are natural raw materials which can be turned into a brand new class of synthetic zeolites. However, each requires different method of synthesis in order to obtain a material with best physical properties. This paper discusses the process of alkaline activation of synthetic zeolites from natural raw materials: volcanic tuff excavated in Filipowice and metakaolin obtained from Rominco company. Two methods: fusion and low-temperature synthesis, were used in the presented research. Moreover, the physical properties of raw materials and zeolites obtained were shown. Based on the XRD analysis, it was verified that materials after the synthesis process contained zeolites A, Na-X and faujasite-Na. Furthermore, the dehydration and thermal decomposition phenomena of the tuff and metakaolin before and after the synthesis process were determined by coupled TG/MS techniques.

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Synthesis and characterization of 13X zeolite from low-grade natural kaolin

Cited by 128 publications

References 26 publications

Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

Facile Preparation of Ammonium Molybdophosphate/Al‐MCM‐41 Composite Material from Natural Clay and Its Use in Cesium Ion Adsorption

Pengembangan Material Sorben Berbasis Zeolite dan Clay Alam se-bagai Media Desalinasi Air Laut

Characterization of the products obtained from alkaline conversion of tuff and metakaolin

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