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INDONESIA
Jurnal Zeolit Indonesia
Published by Institut Teknologi Bandung
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Education
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Articles 7 Documents
 1 
Search results for , issue " Vol 8, No 1 (2009)" : 7 Documents clear
THE EFFECT OF NaOH CONCENTRATION AND TEMPERATURE ON ZEOLITE SYNTHETIS FROM FLY ASH BY HIDROTHERMAL ALKALI Jumaeri, Jumaeri; Sutarno, Sutarno; Kunarti, Eko Sri; Santosa, Sri Juari
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

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Abstract

Zeolite synthesis from coal fly ash PLTU Tanjung Jati Japara was conducted by hydrothermal alkali. Preparation was done on fly-ash that has been refluxed with 1M of HCl and without refluxed. NaOH with certain concentration (2, 3, and 4M) was mixed with coal fly-ash by ratio 10 ml each 1 gram of fly ash into Teflon tube 100 ml at autoclave stainless-steel. Then, autoclave was heated on the oven at temperature of 120-1600C. Synthetic zeolite ouput was qualitative tested by using infrared spectroscopy, X-Ray diffraction, and SEM. The result showed that NaOH concentration, temperature, and hydrothermal alkali period of coal fly ash was affecting characterization of zeolite ouput. The temperature which use for optimally hydrothermal processes exist on range 140 –160oC. The increase of temperature causes improving crystallization of zeolite products. Hydrothermal synthetic product from fly ash is alumina-silica compound which are a mixture of some crystals such as P zeolite, Y zeolite, sodalite, mullite, and quartz.
TECHNIQUE OF ZEOLITE APPLICATION ON AGRICULTURAL AS A SOIL AMELIORANT Suwardi, Suwardi
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

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Abstract

Indonesia is one of countries which is rich in zeolite deposits. Volcanic activities in this country millions years ago released much of volcanic tuff as source of zeolite materials. The most important of zeolite characteristics are high cation exchange capacity (CEC), capability to absorb ammonium ions, and their unique porous structures. Those characteristics can be used for many utilities of zeolite for agriculture such as soil ameliorant, slow release agent of nitrogen fertilizer, and growth media of horticultural plants. Application of zeolite as soil ameliorant gave good effect if applied in low CEC soil such as Oxisol, Ultisol, and some Inceptisol with high dossage of 10-15 ton/ha. Although zeolites improved the soil characteristics and crop production, only a few farmers used zeolites due to economical reasons. Therefore, other techniques should be developed for stimulating farmers to use zeolites. Application of zeolite with lower dosage can be mixed directly with urea in ratio of 1:1 or 30% if the mixtures are pelletized. Zeolite can be applied in company with other soil ameliorants such as compost, liming, and humic acid.
Cs ION EXCHANGE CAPACITY OF ZEOLITE BAYAH, LAMPUNG, AND TASIKMALAYA Noviarty, Noviarty; Anggraini, Dian; Nugroho, Arif
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
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Abstract

Cs ions exchange process has been conducted on natural zeolite (from Bayah, Lampung, and Tasikmalaya) which was activated with ammonium chloride. NH4-zeolite which was formed, is used to exchanger or absorber material of Cs ions. The duration of ions exchange process was optimized by varying the stirring time of 1 hours, 2 hours, 3 hours, 4 hours, 5 hours, and 24 hours. In all three zeolite types was obtained the optimization process time are the contact time of 1 hours. Cation exchange capacity (CEC) of natural zeolite was determined by standard methods. Attempts to obtain a monocation zeolite as a NH4-zeolite effectively acquired about 88% which used as a exchanger or absorber Cs ions. The effectiveness of Cs ions Cation exchange capacity with the ammonium was determined by batch-exchange for 1 hour. The calculation result o effectiveness CEC-Cs are 1.4269 Meq/gram ± 0.0397, RSD: 2.79% for Bayah zeolite, 1.4476 Meq/gram ± 0.0103, RSD: 0.71% for Lampung zeolite, 1.4044 Meq/gram ± 0.0050, RSD: 0.36% for Tasikmalaya zeolite. Stability of Cs-zeolte bond against heat treatment was tested at temperature of 25°, 300°, 600 °, 900°, and 1200 °C. The result showed that the relea se of Cs-ions is not significant from zeolite structure. The heating below 900°C, the release of Cs-ions jus t occurs on the surface (it was not change the initial of zeolite structure), whereas above that temperature was occurs the changed of zeolite structure, although there was not visible the release of Cs-ions on leaching process at the water. The conclusion is all three types of natural zeolite was potentially to be used as Cs-ions isolate which is especially useful to absorbing Cs-radioactive isotope as a result from fission of nuclear fuel element.
THE DESULFURIZATION OF DIESEL FUEL USING NATURAL ZEOLITE ADSORBENT Lusia, Anda
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
Publisher : Jurnal Zeolit Indonesia

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Abstract

Common way has been done to reduce sulfur in fuels is by conventional techniques of hydro desulphurization (HDS), which needs high investment to reduce sulfur bounded as aromatic organosulphur. The alternative technologies of sulfur reduction is using a zeolite absorbent are promising due to ambient operating condition and simple technology. The experiment of sulfur reduction conducted by batch with temperatures around 25oC and contact time around 2 hours with stirring magnetic stirrer speed 100 RPM and addition some of weight zeolites into 100 mL of diesel fuels. Application of natural zeolite Lampung and Malang in experiment of sulfur reduction at diesel fuel with addition 1 g showed that sorption capacity (q) of zeolite Malang (0,58-0.60) larger than Zeolite Lampung (7,17) which is equally to sulfur reduction (h) of zeolite Malang (i.e. 7,17) in which larger than that of zeolite lampung (i.e. 1,48%). The desulphurization treatment using Ni metal ion addition into zeolite shown the increasing of sorption capacity of Ni-Zeolite toward the decreasing of sulphur in diesel fuels. The highest improvement capacity of sorption occurred on zeolite Malang with addition 0.5 g Ni-zeolite that is 1.72.
Application of Zeolite as Carrier for Humic Acid for Increasing Food Crops Production Suwardi, Suwardi; Dewi, Evi Mutiara; Hermawan, Bagus Ahmad
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
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Abstract

Soils in Indonesia are mostly classified as Ultisol having physico-chemical properties such as low pH, low organic matter and very low in nutrients. As a result, the agricultural production on land is very low. Today the use of chemical fertilizers without addition of organic matter to cause a decline in soil organic matter content, soil physical properties become increasingly hard due to structural damage and no development of most soil microorganisms. In such conditions, the soil becomes no more responsive to fertilization so that agricultural production including food crops is leveling of. Therefore, efforts to overcome the barriers of soil properties to increase production of food crops must be done. Recently busy talking people active ingredients that can increase agricultural production spectacular. The material is humic acid extracted from organic materials. The result of this study showed that application of 10 liter/ha humic acid to the soils through zeolite as carrier increased the production of paddy by 15% and corn by 10%. The increase of crop production is due to the development of root then stimulating the absorption of nutrients
PHOTOCATALYTIC PRODUCTION OF TiO2-NATURAL ZEOLITE FROM TASIKMALAYA FOR PHOTODEGRADATION OF METHYLENE BLUE A., Arfan Sani; N., Atiek Rostika; Rakhmawaty, Diana
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
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Abstract

Photocatalyst is reaction process of one materials to another materials which aided by energy from ultraviolet radiation and solid catalyst. The study conducted by making a catalyst based on variation concentrates from natural zeolite Cikalong-Tasikmalaya with addition of TiO2. The test of photocatalytic activity was conducted on methylene blue. The purpose this study to obtain a new photocatalytic is modified of natural zeolite with TiO2 which expected had a high reactivity so able to used on waste fluid processing. The step was conducted were activated natural zeolite, than making of photocatalytic from TiO2 and natural zeolite, and the last is drying on the oven and calcination at 5000C. In the diffraction pattern of TiO2-zeolit (20%) there was a peak of TiO2 around of 2θ about 25,3o, it is indicated that TiO2 was surroundings on natural zeolite. TiO2-zeolit (20%) which was analyzed with SEM showed that active metal of TiO2 has been surroundings on surface of zeolite. Analysis of gas absorption (GSA) with BET methods showed an increase wide of 7,0 m2/g for zeolite and19,4 m2/g for TiO2-zeolit (20%). Best degradation of methylene blue was indicated by TiO2-zeolit (20%) with the value of 82,5% after the radiation with ultraviolet for 80 minutes and measured by visible UV spectrophotometer.
THE KINETIC OF CYCLIZATION-ACETYLATION (R)-(+)-CITRONELLAL WITH ANHYDRIDE ACETIC ACID WHICH CATALYZED OF Zn2+-NATURAL ZEOLITE Cahyono, Edy; Muchalal, M.; Triyono, Triyono; Pranowo, Harno Dwi
Jurnal Zeolit Indonesia Vol 8, No 1 (2009)
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Abstract

Reaction kinetic of acetylation-cyclization (R)- (+)-citronellal with acetic acid anhydride which catalyzed Zn2+-zeolite (Zn2+-Za) was analyzed by Langmuir- Hinshelwood Models. (R)-(+)-citronellal isolated from lemongrass oil with fractionation distillation reduced pressure and analyzed anantiomer ratio with GC chiral column β- DEX 225. Catalyst preparation of Zn2+-Za conducted by acid activation on natural zeolite Malang 100 mesh using 1% HF and 6 M HCl, then soaked on 0,1 M NH4Cl. Calcination was done at 450oC during 1 hour with N2 flow to achieved H-natural zeolite (HZa). Cation exchange H-Za with 0,1 M ZnCl2 conducted to obtain Zn2+-natural zeolit (Zn2+-Za). Reactions of Cyclization-acetylation (R )-(+)- citronellal using a catalyst of Zn2+-Za was done by varying molar ratio of (R )-(+)- citronellal with acetic acid anhydride, namely 0.25, 0.5, 1.0; 1 , 25; 1.5. During the reaction, into system, samples were taken each 1 mL of reaction with duration 10, 20, 30, 60, 120, 180 minutes. Reaction product was extracted with n-hexana. Structure elucidation was done by GC-MS, FTIR spectrophotometer, and 1H-NMR spectrometer. The result showed a greater molar ratio (R)-(+)-citronellal against quantity of acetic acid anhydride acetic, pulegil total was decline. Acetylation-cyclization catalyzed with Zn2+-Za on duration of 30 minutes and 80°C has k of 30.964 to 47.619 mmol (minute.gram catalyst)-1 and KSIT/KAA of 7.09.

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