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All Journal Journal of Tropical Soils Jurnal Zeolit Indonesia Majalah Ilmiah Pengkajian Industri Indonesian Journal of Energy JURNAL REKAYASA KIMIA & LINGKUNGAN
Hens Saputra
Pusat Teknologi Industri Proses Gedung Teknologi 2 Lt.3 Kawasan PUSPIPTEK, Tangerang Selatan, Banten
Aerospace Engineering Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Stabilitas Zirconium-Silika Molecular Sieve dalam Larutan Basa Mustafa, Anwar; Saputra, Hens
Majalah Ilmiah Pengkajian Industri Vol. 7 No. 1 (2013): Majalah Ilmiah Pengkajian Industri
Publisher : Deputi TIRBR-BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (857.683 KB) | DOI: 10.29122/mipi.v7i1.3641

Abstract

Telah dilakukan penelitian pengaruh zirconium dalam perbaikan stabilitas silika molecular sieve dalam larutan basa. Struktur molecular sieve yang dibuat adalah hexagonal MCM-41 yang memiliki luas permukaan 1200 m2/g. Pembuatan bahan silika MCM-41 dilakukan menggunakan campuran larutan cethyltrimetilammonium bromida (CTAB), tetraethylorthosilikat (TEOS), natrium hidroksida (NaOH) dan aquades (H2O) dengan perbandingan molar 0,05 : 1,0 : 0,5 : 100. Adapun penambahan zirconium isopropoksida (ZrPr) sejumlah 3% berat terhadap tetraethylorhosilikat. Penambahan zirconium pada MCM-41 tidak merubah karakteristik distribusi ukuran pori, diameter pori rata-rata sekitar 2 nm dengan luas permukaan mencapai 1200 m2/g. Dengan penambahan 3% berat ZrPr dapat meningkatkan stabilitas silika molecular sieve pada larutan basa. Pengamatan struktur dilakukan dengan X-ray diffraction. Karakteristik pori dianalisis dengan metode physisorption menggunakan nitrogen pada 44 K.Kata Kunci : Zircorium, Molecular Sieve, diameter poriAbstractHas conducted research on the effect of zirconium silica molecular sieve improved stability in alkaline solution . Molecular sieve structure is made of hexagonal MCM - 41 which has a surface area of 1200 m2 / g . Preparation of MCM - 41 silica materials was conducted using a mixed solution of cethyltrimetilammonium bromide ( CTAB ) , tetraethylorthosilikat ( TEOS ) , sodium hydroxide ( NaOH ) and distilled water ( H2O ) with a molar ratio of 0.05 : 1.0 : 0.5 : 100 . As for the addition of zirconium isopropoxide ( ZrPr ) a 3 % by weight of the tetraethylorhosilikat . The addition of zirconium in the MCM - 41 does not alter the characteristics of the pore size distribution , average pore diameter of about 2 nm with a surface area to 1200 m2 / g . With the addition of 3 wt% silica ZrPr can increase the stability of molecular sieve in an alkaline solution . Observation of the structure is done with X - ray diffraction . Pore characteristics were analyzed by the method using nitrogen physisorption at 44 K.Keywords : Zircorium , Molecular Sieve , Pore diameter
PEMBUATAN DAN KARAKTERISASI KATALIS ZEOLIT ZSM-5 UNTUK KONVERSI BIOETANOL MENJADI BIOETILENA Nurdin, Ali; Saputra, Hens; Arfiana, Arfiana; Yunilawati, Retno; Finalis, Era Restu
Majalah Ilmiah Pengkajian Industri Vol 12, No 2 (2018): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (679.284 KB) | DOI: 10.29122/mipi.v12i2.2741

Abstract

Etilen sebagai produk petrokimia yang penting dapat dibuat dari bioetanol menggunakan katalis ZSM5. Zeolit sintetis ZSM5 dapat dibuat menggunakan zeolit alam yang banyak tersedia di Indonesia. Proses pembuatan ZSM5 menggunakan metode hidrotermal pada temperatur 180°C selama 24 jam. Sebagai agen pengarah terbentuknya struktur ZSM-5 tersebut digunakan template TPABr (Tetra Prophyl Ammonium Bromide). Kalsinasi produk ZSM5 dilakukan pada temperatur 600°C selama 1 jam. Karakterisasi ZSM-5 yang dilakukan antara lain analisis struktur dan kristalinitas, observasi morfologi permukaan menggunakan metode Difraksi Sinar X, Scanning Electron Microscopy, dan physisorption untuk mempelajari sifat pori. Hasil penelitian menunjukkan bahwa dihasilkannya ZSM-5 dengan kristalinitas sekitar 110 %. Kristal ZSM-5 yang dihasilkan berbentuk kubus dengan luas permukaan spesifik BET 300 m2/g, volume pori sekitar 0,13 Cm3/g. Distribusi ukuran pori yang sempit mengindikasikan ukuran pori yang seragam dengan ukuran rata-rata 0.55 nm.
Development of Carbon Based NPK Slow Release Fertilizer using Biochar from Oil Palm Empty Fruits Bunch Finalis, Era Restu; Sri Djangkung, Sumbogo Murti; Arfiana; Noor, Ilhamsyah; Suratno, Hadi; Rosyadi, Erlan; Saputra, Hens; Noda, Reiji
Indonesian Journal of Energy Vol. 3 No. 1 (2020): Indonesian Journal of Energy
Publisher : Purnomo Yusgiantoro Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33116/ije.v3i1.45

Abstract

Biochar is a solid material produced by thermochemical conversion of biomass under oxygen-limited conditions. It has a wide surface and contains many pores so that it can be used as a material for making fertilizer. Biochar based slow release NPK fertilizer was formulated and developed to reduce nutrient leaching and greenhouse gas emissions. In this research, biochar which was a by-product of biomass gasification using oil palm empty fruit bunches was processed to make slow release biochar NPK fertilizer. Sources of nitrogen (N) were derived from urea, phosphate (P) from diamonium phosphate (DAP) and potassium (K) derived from potassium chloride (KCl). Zeolite was added as a matrix to improve fertilizer characteristics. All materials were formulated to make slow release biochar NPK fertilizer used for red onion (Allium sepa) plant applications. Several micronutrients were also added including Mg (MgSO4 fertilizer) and S (ZA fertilizer) to support plant growth. The characterization of fertilizer products was carried out by using SEM, BET etc. to determine physical properties including surface area, pore volume, morphology and composition. Furthermore, biochar NPK fertilizer was applied to the red onion plant which was a high-value crop in Indonesia. The application of NPK biochar fertilizer on red onion plant showed its superiority compared to commercial NPK fertilizers. In addition, the use of Magnesium and sulfur micronutrients could support the growth of red onion bulbs so that they produced more and bigger bulbs.*The paper has been selected from a collaboration with IPST and 7th ICFCHT 2019 for a conference entitled "Innovation in Polymer Science and Technology (IPST) 2019 in Conjunction with 7th International Conference on Fuel Cell and Hydrogen Technology (ICFCHT 2019) on October 16th - 19th at The Stones Hotel Legian, Bali, Indonesia"
Release Pattern of Nitrogen and Potassium from Controlled Release Fertilizer (CRF) in the Soil Suwardi, Suwardi; Suryaningtyas, Dyah Tjahyandari; Saputra, Hens; Rosjidi, Mochamad; Mustafa, Anwar; Ghofar, Abdul
JOURNAL OF TROPICAL SOILS Vol. 28 No. 3: September 2023
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts.2023.v28i3.99-106

Abstract

Nitrogen (N) and potassium (K) are macronutrients that plants need for better growth and yield. However, they are readily lost from the soil through volatilization, denitrification, and leaching, aside from being absorbed by plant roots. Thus, a Controlled Release Fertilizer (CRF) may be formulated and applied to maximize the beneficial effects of N and K fertilization. This study aimed to describe the release pattern of ammonium nitrogen (NH4 -N), nitrate nitrogen (NO3 -N), and K from CRF through the laboratory incubation method. Two types of CRF - CRF A (16-16-16) and CRF B (30-6-8), with a non-CRF (Mutiara NPK16-16-16) as Control – were used. Each fertilizer was tested at 600 and 1200 kg ha-1 doses. The results showed that the NH4 -N release was very high at 40 – 60% but declined to almost 0% after 14 weeks. The NO3 -N release rate was 17 – 40% during the first week, followed by a steady increase to nearly 100% by the 14th incubation week. Potassium release ranged from 20% to 30% in the first week, then rose to 30 – 70% at Week 14. Overall, CRF (30-6-8) at a dose of 1200 kg ha-1 showed the slowest rate of nitrogen release.
Mesopori MCM-41 sebagai Adsorben: Kajian Kinetika dan Isotherm Adsorpsi Limbah Cair Tapioka Darmansyah, Darmansyah; Ginting, Simparmin; Ardiana, Lisa; Saputra, Hens
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 1 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i1.4228

Abstract

Telah dilakukan penelitian penggunaan material aluminasilikat MCM-41 sebagai adsorben limbah cair tapioka. Dalam penelitian ini dipelajari permodelan isotermal dan kinetika adsorpsi dari material MCM-41 pada proses adsorpsi limbah cair tapioka. Isotermal Langmuir dan Freundlich digunakan sebagai permodelan isotermal data penelitian. Dari data penelitian yang diperoleh pada konsentrasi COD sebesar 416 - 784 mg/L, proses adsorpsi limbah cair tapioka oleh MCM-41 sesuai dengan pendekatan isothermal Langmuir. Kapasitas maksimum adsorpsi MCM-41 diperoleh dari pendekatan Langmuir adalah sebesar 15,92 mg/g. Model kinetika pseudo-orde pertama dan pseudo-orde kedua digunakan untuk analisis kinetika adsorpsi pada data penelitian. Model kinetik pseudo-orde pertama yang sesuai dengan proses adsorpsi limbah cair tapioka dengan laju penyerapan adalah 7,48 x 10-2 dan 7,37 x 10-2 g/(min-mg) untuk konsentrasi awal secara berturut-turut adalah 608 dan 784 mg/L.
Co-Authors A.A. Ketut Agung Cahyawan W AA Sudharmawan, AA Abdul Ghofar Ardiana, Lisa Arfiana Arfiana Arfiana, Arfiana Bhaskara, Arya DARMANSYAH . Dyah Setyorini Dyah Tjahyandari Suryaningtyas Fauzan, Naazi Finalis, Era Restu Finalis, Era Restu Islam Nurwantoro, Dorit Bayu Islam Nurwantoro, Dorit Bayu Ismail, Mochammad Ismail, Mochammad Moch. Rosjidi, Moch. Muharto, Bambang Murti, Galuh Wirama Mustafa, Anwar Noda, Reiji Noor, Ilhamsyah Pertiwi, Astri Rahmawati, Nurdiah Retno Yunilawati Rini, Tyas Puspita Rosjidi, Mochamad Rosjidi, Mochamad Rosjidi, Mochamad Rosyadi, Erlan Simparmin Ginting Sri Djangkung, Sumbogo Murti Suratno, Hadi Suwardi Suwardi Tandirerung, Murbantan Tandirerung, Murbantan Widowati, Ladiyani Widowati, Ladiyani