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All Journal VALENSI CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis EduChemia: Jurnal Kimia dan Pendidikan ALCHEMY Jurnal Penelitian Kimia Jurnal Riset Sains dan Kimia Terapan Bulletin of Chemical Reaction Engineering & Catalysis

Isalmi Aziz

Program Studi Kimia Fakultas Sains Dan Teknologi Universitas Islam Negeri Syarif Hidayatullah Jakarta

Author-ID : 237739

Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Engineering Environmental Science Materials Science & Nanotechnology

Published : 33 Documents Claim Missing Document

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Penggunaan Zeolit Alam sebagai Katalis dalam Pembuatan Biodiesel Isalmi Aziz; Siti Nurbayti; Arif Rahman
Jurnal Kimia Valensi Jurnal Valensi Volume 2, No.4, Mei 2012
Publisher : Syarif Hidayatullah State Islamic University

Biodiesel merupakan energi alternatif yang dapat menggantikan bahan bakar diesel. Biodiesel telahdibuat melalui reaksi transestrifikasi minyak goreng bekas dengan bantuan katalis. Penggunaan zeolitalam sebagai katalis dapat memudahkan separasi biodiesel dari produk samping (gliserol). Pembuatanbiodiesel dilakukan pada suhu 60oC, perbandingan minyak dan metanol 4:1 (volum) denganmemvariasikan waktu reaksi dan konsentrasi katalis zeolit. Hasil penelitian menunjukan bahwa waktureaksi 5 jam dan konsentrasi katalis zeolit 1% memberikan yield biodiesel terbesar yaitu 12%.

Upgrading Crude Biodiesel dari Minyak Goreng Bekas menggunakan Katalis H-Zeolit Isalmi Aziz; Muhammad Akbar Tafdila; Siti Nurbayti; Lisa Adhani; Wahyu Permata
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 1, May 2019
Publisher : Syarif Hidayatullah State Islamic University

Crude biodiesel hasil transesterifikasi minyak goreng bekas dapat ditingkatkan kualitasnya melalui proses catalytic cracking menggunakan zeolit alam. Penelitian ini bertujuan untuk menentukan kondisi optimum proses catalytic cracking dan sifat fisika dan kimia biofuel yang dihasilkan. Reaksi dijalankan dalam reaktor dengan memvariasikan waktu (1, 2 dan 3 jam), konsentrasi katalis (3, 5 dan 7 %), ukuran partikel katalis (180, 250 dan 630μm) dan suhu reaksi (325, 350 dan 375°C). Kondisi optimum proses catalytic cracking crude biodiesel didapatkan pada : waktu 3 jam, konsentrasi katalis 7%, ukuran partikel katalis 180 μm dan suhu reaksi 375°C. Biofuel yang dihasilkan mengandung 6,26% fraksi bensin(C5-C11); 17,6% kerosin (C12-C15), 47,73% biodiesel (C16-C20) dan asam lemak 28,4%. Analisis sifat fisik menunjukan densitas 0,9631g/mL, titik tuang 12°C, titik nyala 49°C dan angka oktan 72,6. Kata kunci: catalytic cracking, crude biodiesel, angka oktan, biofuel. Crude biodiesel from transesterification of used cooking oil can be improved in quality through catalytic cracking using natural zeolite. This study aims to determine the optimum conditions for catalytic cracking and the physical and chemical properties of biofuels produced. The reaction was carried out in the reactor by varying the time (1, 2 and 3 hours), catalyst concentration (3, 5 and 7%), catalyst particle size (180, 250 and 630 μm) and reaction temperature (325, 350 and 375°C) . The optimum conditions for the catalytic cracking crude biodiesel process were obtained at: 3 hours, 7% catalyst concentration, catalyst particle size 180 μm and reaction temperature 375 ° C. The resulting biofuel contains 6.26% gasoline fraction (C5-C11); 17.6% kerosene (C12-C15), 47.73% biodiesel (C16-C20) and fatty acids 28.4%. Physical properties analysis showed density of 0.9631g/mL, pour point 12°C, flash point 49°C and octane number 72.6. Keywords: Catalytic cracking, crude biodiesel, octane number, biofuel.

Peningkatan Kualitas Crude Glycerol dengan Proses Adsorpsi Menggunakan Sekam Padi Isalmi Aziz; Muhammad Nizar Aristya; Hendrawati Hendrawati; Lisa Adhani
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 4, No. 1, Mei 2018
Publisher : Syarif Hidayatullah State Islamic University

Crude glycerol merupakan produk samping pembuatan biodiesel dengan kemurnian yang rendah karena masih mengandung senyawa pengotor seperti metanol, asam lemak bebas, katalis dan air. Senyawa pengotor ini harus dihilangkan supaya kualitas gliserol meningkat dan punya nilai jual yang tinggi. Adsorpsi merupakan salah satu metoda yang dapat digunakan untuk menyerap senyawa pengotor tersebut. Pada penelitian ini digunakan sekam padi sebagai adsorben karena mengandung selulosa. Selain itu sekam padi merupakan limbah, sehingga pemanfaatannya sebagai adsorben akan dapat menekan biaya proses pemurnian crude glycerol. Penelitian ini bertujuan untuk menentukan kondisi optimum proses (waktu, suhu, konsentrasi adsorben dan ukuran adsorben), kualitas gliserol yang dihasilkan dan karaktersitik adsorben sebelum dan sesudah adsorpsi (FTIR dan SEM). Crude glycerol terlebih dahulu diasamkan menggunakan asam fosfat dan selanjutnya di ekstraksi menggunakan metanol. Crude glycerol hasil ekstraksi selanjutnya di lakukan adsorpsi menggunakan sekam padi yang sudah diaktivasi. Hasil adsorpsi disaring dan ditentukan kadar gliserolnya. Hasil penelitian menunjukkan bahwa kondisi optimum adsorpsi diperoleh pada waktu 75 menit, suhu 90 oC, konsentrasi adsorben 20% dan ukuran adsorben 180 µm. Kualitas gliserol yang dihasilkan memiliki kadar gliserol 97.290%, air 1.698%, abu 0.885%, MONG 0.132%, tidak mengandung gula. Spektrum FTIR sebelum adsorpsi menunjukkan adanya gugus O-H, C=O, C=C dan C-O dan setelah adsorpsi terjadi penambahan gugus C-H alifatik. Morfologi adsorben sebelum adsorpsi memperlihatkan pori-pori yang terbuka dan setelah adsorpsi pori-pori tersebut tertutupi oleh senayawa pengotor.DOI:http://dx.doi.org/10.15408/jkv.v4i1.7498

Pembuatan Biodiesel dengan Cara Adsorpsi dan Transesterifikasi Dari Minyak Goreng Bekas Lisa Adhani; Isalmi Aziz; Siti Nurbayti; Christie Adi Octavia
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 2, No. 1, Mei 2016
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v2i1.3107

Used cooking oil can be used as raw material for biodiesel, but the levels of free fatty acids (Free Fatty Acid, FFA) is quite high. It is necessary for pretreatment in the form of the adsorption process to reduce levels of FFA. This study aims to determine the optimal conditions of adsorption process and determine the quality of biodiesel produced from adsorption processes and transesterification. Natural zeolites are used as adsorbents activated beforehand using ammonium chloride, calcined and heated to obtain H-zeolite. Furthermore, the adsorption process optimization includes the time, the adsorbent concentration, temperature and particle size. The oil that is already in the adsorption catalyst is reacted with methanol and KOH to obtain biodiesel. The optimum adsorption conditions obtained at the time of 90 minutes, the concentration of H-zeolite 12%, temperature 90 ° C, and a particle size of 0.2 mm that can lower FFA levels from 3.2% to 1.1%. Biodiesel produced meets the quality requirements of SNI 04-7182-2006 with a water content of 0.02%, a density of 857.60 kg / m3, the acid value of 0.29 mg-KOH / g, iodine number 15.71, saponification 168 , 02 and cetane index of 75.62. Compounds contained in biodiesel are methyl 9-octadecanoic (49.45%), methyl heksadekanoat (20.79%), and methyl 9,12oktaekanoat 9.12 (18.87%). Keywords: Biodiesel, used cooking oil, adsorption, transesterification, H-zeolitDOI: http://dx.doi.org/10.15408/jkv.v2i1.3107

Biosynthesis of ZnO Nanoparticles Using Pumpkin Peel Extract (Cucurbita moschata) and its Applications as Semiconductor in Dye Sensitized Solar Cell (DSSC) Nanda Saridewi; Dzikri Anfasa Firdaus; Isalmi Aziz; Biaunik Niski Kumila; Dasumiati Dasumiati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 7, No. 2, November 2021
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v7i2.21046

ZnO nanoparticles are semiconductor materials that can be used in Dye Sensitized Solar Cells (DSSC). ZnO nanoparticles can be synthesized using pumpkin peel extract (Cucurbita moschata) which functions as a reducing agent, stabilizer, and capping agent. Zn(CH3COO)2.2H2O precursor was used with a concentration of 0.15 M at various pH 7, 8, and 9 reacted with pumpkin peel extract. The functional groups of pumpkin peel extract were characterized using Fourier Transform Infrared Spectroscopy (FTIR), the samples were analyzed by TEM and XRD. The resulting ZnO nanoparticles were used as semiconductors in Dye Sensitized Solar Cell (DSSC) using dyes from mangosteen peel.The FTIR results showed the presence of functional groups O-H hydroxy, CH2, secondary amides (R-CO-NR2, C-H and phosphate (PO43-). XRD results showed that ZnO produced wurzhite crystals with a hexagonal system and the smallest crystal size was 18.99 nm. TEM results showed that ZnO synthesized at a concentration of 0.15 M and pH 8 had a spherical particle shape with a size of 24.90 nm, while the DSSC test results had an efficiency of 9.06 x 10-4%.

Penggunaan H-Zeolit dan Tawas dalam Pemurnian Crude Glycerol dengan Proses Adsorpsi dan Koagulasi Isalmi Aziz; Nur Hijjah Bayani Fadhilah; Hendrawati Hendrawati
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Production of biodiesel from used cooking oil byproducts such as crude glycerol with low purity. The crude glycerol containing compounds impurities such as free fatty acids, alcohol, soap, catalyst and water. Compound adsorption of impurities can be done with the H-zeolite as adsorbent, but the resulting quality is still not good. To improve its quality, this research was added alum (coagulation) process so that the adsorption of colloidal-sized compound impurities which can be separated from the glycerol. The purpose of this research is determine optimal condition of adsorption and coagulation impurity compounds of crude glycerol by using H-zeolite and alum and also determine quality of glycerol was obtained. First, crude glycerol acidified by phosphoric acid 85% (pure analysis) until desired pH ±2.5. It was obtained purity of glycerol 72.797%. The next process is adsorption with activated H-zeolite and it obtained purity of glycerol 77.079%. The last process in this research is adsorption and coagulation by using H-zeolite and alum. The highest purity glycerol 93.803% was obtained from condition of adsorption and coagulation for 75 minutes; alum’s concentration 80 ppm; and temperature 60 ºC. The glycerol discharged from adsorption and coagulation process by using H-zeolite and alum is qualify Indonesia National Standard number 06-1564-1995 with 3.512% water content; 2.438% ash content; 0.247% MONG content; has no sugar; 1.259 g/mL density of glycerol; 0.2356% potassium content and 0.0410% aluminium content; and brighter color.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5143

Pemanfaatan Limbah Kulit Ayam Broiler sebagai Bahan Baku Pembuatan Biodiesel Isalmi Aziz
Jurnal Kimia Valensi Jurnal VALENSI Volume 4, No. 2, November 2014
Publisher : Syarif Hidayatullah State Islamic University

Pemurnian Gliserol Dari Hasil Samping Pembuatan Biodiesel Menggunakan Bahan Baku Minyak Goreng Bekas Isalmi Aziz; Siti Nurbayti; Fira Luthfiana
Jurnal Kimia Valensi Jurnal Valensi Volume 1, No.3, November 2008
Publisher : Syarif Hidayatullah State Islamic University

Telah dilakukan penelitian yang bertujuan untuk memisahkan gliserol dari pengotornya untukmendapatkan kadar yang lebih tinggi. Pemisahan gliserol dilakukan dengan penambahan asamphospat diikuti penambahan karbón aktif untuk menarik sisa kotoran dan warna. Terakhirdigunakan rotary evaporator untuk menarik air. Gliserol yang digunakan dalam penelitian iniberasal dari hasil samping pembuatan biodiesel. Minyak goreng bekas dan katalis KOHdigunakan sebagai bahan baku untuk pembuatan biodiesel. Hasilnya menunjukkan kadartertinggi gliserol sebesar 76,43 % dihasilkan pada kondisi : pH 6; karbón aktif 5 % dan waktuadsorbsi 24 jam.

PEMBUATAN PUPUK KALIUM SULFAT DARI PRODUK SAMPING BIODISEL DENGAN BAHAN BAKU MINYAK GORENG BEKAS Isalmi Aziz; Hendrawati Hendrawati; Nani Suryani
Jurnal Riset Sains dan Kimia Terapan Vol 4 No 2 (2014): JRSKT - Jurnal Riset Sains dan Kimia Terapan, Volume 4 Nomor 2 Desember 2014
Publisher : Program Studi Kimia Universitas Negeri Jakarta

Pembuatan biodiesel dari minyak goreng bekas menghasilkan produk samping crude glycerol yang mengandung katalis KOH. Katalis ini dapat dimanfaatkan sebagai bahan baku pembuatan pupuk kalium sulfat. Penelitian ini bertujuan untuk menentukan kondisi optimum pembuatan pupuk kalium sulfat dan menentukan kualitas pupuk yang dihasilkan. Pembuatan pupuk dimulai dengan mereaksikan crude glycerol yang mengandung KOH dengan asam sulfat dengan memvariasikan waktu reaksi, suhu dan konsentrasi asam sulfat. Kalium sulfat yang dihasilkan disaring dan dicuci. Kondisi optimum didapatkan pada waktu 30 menit, suhu 60oC dan konsentrasi asam sulfat 2,5% volum dengan konversi reaksi 31%. Kualitas pupuk yang dihasilkan adalah : kadar kalium 55%, kadar sulfur 18%, kadar klorin 0,006% dan kadar air 1%. Pupuk kalium sulfat ini memenuhi SNI pupuk kalium sulfat tahun 2005. Production of biodiesel from used cooking oil produces crude glycerol byproduct containing KOH catalyst. This catalyst can be used as raw material for the manufacture of potassium sulfate fertilizer. This study was to determine the optimum conditions for the production of potassium sulfate fertilizer and determine the quality of the fertilizer produced. Fertilizer production was begun by reacting crude glycerol containing sulfuric acid with KOH with varying reaction time, temperature and concentration of sulfuric acid. After production, potassium sulphate was filtered and washed. The optimum conditions were observed at 30 min, temperature of 60 Â° C and sulfuric acid concentration of 2.5% volume with 31% conversion reaction. The quality of the resulting fertilizer are: 55% potassium, 18% sulfur, 0.006% chlorine and 1% water. The potassium sulfate fertilizer meets national standard (SNI) 200

Catalytic Cracking of Crude Biodiesel into Biohydrocarbon Using Natural Zeolite Impregnated Nickel Oxide Catalyst Isalmi Aziz; Edra Aditya Fhilipia Ardine; Nanda Saridewi; Lisa Adhani
Jurnal Kimia Sains dan Aplikasi Vol 24, No 7 (2021): Volume 24 Issue 7 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Crude biodiesel is biodiesel that still contains impurities. A catalytic can improve the quality of biohydrocarbons (biogasoline, biokerosene, and green diesel). The catalyst used is nickel oxide impregnated natural zeolite (NiO/Zeolite). The use of nickel can increase the activity of the catalyst because it has an empty d orbital and a smaller molecular size. This study aims to determine the best catalyst that can exhibit the greatest selectivity toward biohydrocarbons. Natural zeolite was activated and impregnated by varying the concentration of NiO (1, 3, and 5% w/w). The characteristics of the catalyst were determined by the crystallinity (X-Ray Diffraction), surface area (Surface Area Analyzer), and functional group (Fourier Transform Infrared). The catalyst and crude biodiesel were put in an autoclave reactor and operated at a temperature of 375°C and 3 hours. The obtained product was tested with Gas Chromatography-Mass Spectroscopy. The results of the XRD analysis showed the presence of NiO at 2θ 37.23; 43.15; and 62.65°. Nickel oxide on the catalyst was detected at a wavenumber of 671.23 cm‑1. The highest surface area was obtained at a NiO/Zeolite 1% of 49.4 m2/g. 1% NiO/Zeolite catalysts gave the best results on catalytic cracking of crude biodiesel with a reaction conversion of 60.79% and selectivity of 9,73%; 29,64% and 9,18% for biogasoline, biokerosene, and green diesel, respectively.

Co-Authors Adawiah Adawiah Adawiah Adawiah adawiah adawiah, adawiah Adid Adep Dwiatmoko Agung Setia Nugraha Agustino Zulys Agustino Zulys Anna Muawanah Annisa Shabrina Arif Rahman Arif Rahman Hakim Badrul Ulum Badrul Ulum Biaunik Niski Kumila Christie Adi Octavia Dasumiati Dasumiati Dede Sukandar Dwiatmoko, Adid Adep Dzikri Anfasa Firdaus Edra Aditya Fhilipia Ardine Egi Agustian Eka Puspa Sari Farishi, Salman Fira Luthfiana Fitri Febriyani Fitria, Shella Hendrawati Hendrawati Hendrawati Hendrawati Joni Prasetyo, Joni Juwita Suwandari Lian Risa Adinda, Ade Lisa Adhani Lisa Adhani Lisa Adhani Lisa Adhani Lisa Adhani Lisa Adhani Maharani, Najiah Sephia Mohammad Ali Marwono Muhammad Akbar Tafdila Muhammad Farhan Muhammad Ihsan Maulana Muhammad Nizar Aristya Muhammad Shofyan Gunawan Nanda Saridewi, Nanda Nani Suryani Nino Rinaldi Niski Kumila, Biaunik Novia Dwi Rahmawati Noviyan Darmawan Nur Hijjah Bayani Fadhilah Nur Mahrunnisa Nurhasni Nurhasni Purwantiningsih Sugita Reza Falepi Riyanti, Aditya Saeful Rohman Saeful Rohman Savitri Savitri Selviana Rustanti Siti Nurbayti Siti Nurbayti Siti Nurbayti Siti Nurbayti Thamzil Las Wahyu Permata Wahyu Permata Widjaya, Robert Ronal Wulandari Oktavia Yati Maryati yati, indri Yessinta Kurnianti Yulyani Nur Azizah

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