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All Journal Prosiding Seminar Nasional MIPA Jurnal Matematika & Sains Jurnal Zeolit Indonesia
Yateman Arryanto
Jurusan Kimia Fakultas MIPA UGM Sekip Utara Kotak Pos Bls 21Yogyakarta 55281
Education Mathematics

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SINTESIS FAUJASITE DARI ABU LAYANG BATUBARA : Pengaruh Refluks dan Penggerusan Abu Layang Batubara terhadap Kristalinitas Faujasite Sutarno Sutarno; Yateman Arryanto; Arief Budhyantoro
Jurnal Matematika & Sains Vol 9, No 3 (2004)
Publisher : Institut Teknologi Bandung

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Synthesis of Faujasite from coal fly ash has been conducted which involved reflux, grinding fusion and hydrothermal reaction. Coal fly ash is refluxed with hydrochloric acid 5 M at 90 oC for 5 hours. Grinding effect of refluxed coal fly ash on Faujasite synthesis has been studied as other variable on synthesis of Faujasite. Coal fly ash is mixed with NaOH pellet which NaOH : coal fly ash ratio = 1.2, and then fused at 550 oC for 1 hour. Fused coal fly ash is mixed with 100 ml distilled water, stirred and aged for 24 hours. The resulted solution was then reaeted with hydrothermal bomb autoclave at 100 oC for 3 days. The result was characterized with X-ray diffraction using diffractometer shimadzu 3001. The experimental data showed that coal fly ash refluxed with hydrochloric acid 5 M increased in Si/Al ratio of coal fly ash. Synthesis of Faujasite with coal fly ash refluxed with HCl 5 M as raw material produced good crystallinity Faujasite, but the used of unrefluxed coal fly ash as raw material on synthesis of zeolite gave hydroxysodalitet. Synthesis of Faujasite from ungrand coal fly ash whichh is refluxed with HCl 5 M gave better Faujasite crystallinity than that of the grund one.
Prospects of Natural Zeolites in Indonesia for Industrial Separations and Environmental Management Yateman Arryanto; Siti Amini; Max G. Q. Lu
Jurnal Zeolit Indonesia Vol. 1 No. 1 (2002)
Publisher : Jurnal Zeolit Indonesia

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Zeolite as well as molecular sieves are a class of aluminosilicate materials, which have found wide use in industries for separation, purification and pollution control. In the new era of nanomaterials in the 21st century, these nanoporous materials have become more widely used in separation, catalysis and environmental management, even in microelectronic and energy storage sectors. The following briefly shows the great potential of natural zeolites for some important environmental applications: CO2 removal from landfill gas and coal seam gas using Pressure Swing Adsorption (PSA) with Clinoptilolites: Natural zeolite is not only a cheaper solution to the economical storage system of methane for NGVs but it also present a safer storage medium as alternative adsorbent such activated carbon is flammable and very costly. There is also an increasing interest in indoor air quality control issues among the building industries and health organizations. It has been demonstrated that clinoptilolite is particularly effective adsorbent for odours and some volatiles in indoor environment. Another area of importantnce of natural zeolites is the solar energy application. Zeolites can adsorb water vapour and create effective cooling with solar heat as the energy to regenerate the zeolite. Systems using zeolites can be designed in such a way that combined cooling and heating can be achieved at about 40-60% efficiency. Adsorption of Nitrogen and Oxygen in zeolites for PSA application Cp zeolite deposit has about 75% of the capacity of a commercial Mordenite zeolite for air separation at 30°C. The dynamics studies showed that Cp zeolite is suitable for N2 and O2 separation due to their large difference in adsorption kinetics.
HYDROLYSIS OF CLAY FROM CAPKALA WITH VARIATION OF CHLORIDE ACID CONCENTRATIONS Nelly Wahyuni; Imelda H. S.; Yateman Arryanto; Sutarno Sutarno; Ya' Zupriadi
Jurnal Zeolit Indonesia Vol. 7 No. 1 (2008)
Publisher : Jurnal Zeolit Indonesia

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Hydrolysis of clay from Capkala with variation of chloride acid concentratios has been done. Hydrolysis of clay has been conducted by reacting clay in HCl with stirring during 24 hours. Hydrolysis was conducted in several variations of HCl concentration at room temperature. Hydrolyzed clay was characterized by the Atomic Absorption Spectophotometer, Infrared Spectophotometer, and X-ray Diffractometer. The analysis of Spectophotometer of Atomic Absorption was not showed the decreasing of aluminum content of hydrolized clay which is not the extrication of aluminum metal from clay structure. Infrared spectra from hydrolized clay was not showed the eliminated of absorption peak for Al-OH bonds in octahedral layer. Diffractograms of hydrolized clay was not showed the changing angle of 2θ but figuring the increase of intensity of diffraction peak which indicates discharge of pollutant metals from clay structure.
PEMBUATAN CONCRETE ZEOLIT-LEMPUNG UNTUK PERVAPORASI CAMPURAN ETANOL/AIR TANPA PEMANASAN I Made Wisnu Adhi Putra; Yateman Arryanto; Indriana Kartini
Prosiding Seminar Nasional MIPA 2012: PROSIDING SEMINAR NASIONAL MIPA UNDIKSHA 2012
Publisher : Prosiding Seminar Nasional MIPA

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ABSTRACTPreparation of zeolite-clay concrete for new ethanol/water pervaporation without heating has been carried out. Concrete was made by mixing natural zeolite, portland cement, natural clay and distilled water in porcelain disk. The mixture was manually stirred until homogenous suspension obtained. The suspension formed was then placed in the mold and allowed to dry in open air for 48 hours. The mass of natural zeolite was varied from 10, 12.5, 15, 17.5, and 20 g meanwhile the mass of natural clay was varied from 0, 1.25, 2.5, 3.75, and 5 g. The mass of portland cement was fixed in the value of 10 g. The concrete was characterized by infrared spectrophotometer (IR) and X-ray diffraction (XRD). Material testing machine was used to determine the compressive strength of the concrete agreeable with decided ASTM C349-08 standard.Based on preparation of zeolite-clay concrete, it was found that the increase of the natural zeolite mass from 15 to 20 g caused fracture to the concrete, but water adsorption percentage increased from 27.7% to 35.2%. Meanwhile, the higher the mass of natural clay, the greater the compressive strength of concrete from 130.3 MPa to 179.9 MPa and water adsorption percentage from 28.9% to 32.3%. The adsorption-desorption data showed that the water was faster to adsorb into the concrete than ethanol, whereas the desorption rate of concrete with respect to ethanol was greater than that to water. The difference on desorption rate was then used to separate ethanol/water mixture through pervaporation without heating. Pervaporation test using the concretes resulted in the increase of ethanol feed concentration from 60%, 70%, 80%, and 90% to 82.9%, 82.5%, 87.8%, and 93.7% respectively.Keywords: concrete, compressive strength, adsorption-desorption, ethanol/water mixture, pervaporation.
Co-Authors Arief Budhyantoro Holyness Nurdin Singadimedja I Made Wisnu Adhi Putra Imelda H. S. Indriana Kartini Max G. Q. Lu Nelly Wahyuni Siti Amini Ya' Zupriadi