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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

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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.

Conversion of Nyamplung Oil into Green Diesel through Catalytic Deoxygenation using NiAg/ZH Catalyst Isalmi Aziz; Lisa Adhani; Muhammad Ihsan Maulana; Mohammad Ali Marwono; Adid Adep Dwiatmoko; Siti Nurbayti
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 2, November 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i2.25943

Nyamplung oil (Calophyllum inophyllum L) can be converted into green diesel by the catalytic deoxygenation method. Bimetallic catalyst NiAg supported by hierarchical natural zeolite (NiAg/ZH) can be used in this method. This study aims to determine the characteristics of the NiAg/ZH catalyst and the optimal conditions for the catalytic deoxygenation of nyamplung oil into green diesel. The NiAg/ZH catalyst was synthesized by wet impregnation with a total metal concentration of 10% and a mass ratio of Ni/Ag of 4. X-Ray Diffraction, Surface Area Analyzer and NH3-TPD characterized the catalyst. Catalytic deoxygenation of Nyamplung oil was carried out by varying the temperature (325, 350 and 375 °C) and reaction time (1, 2 and 3 hours) with a catalyst dosage of 5%. The composition of the product was analyzed using Gas Chromatography-Mass Spectroscopy. The catalyst XRD spectrum showed a peak at 2θ = 22.38° (clinoptilolite zeolite), 44.42° (Ni) and 38.21° (Ag). The surface area of the catalyst is 46.7024 m2/g, the pore volume is 0.0813 cc/g, the average pore diameter is 6.9632 nm, and the deposit is 1.6882 mmol/g. The optimum catalytic deoxygenation of nyamplung oil was obtained at 350 °C and 3 hours with a gasoline selectivity of 3.51%, kerosene 4.73%, and 62.02% green diesel.

Synthesis of ZnO-TiO2 Nanoparticles by Sol-Gel Process and its Application for Solar Cell Semiconductor Saridewi, Nanda; Riyanti, Aditya; Aziz, Isalmi; Niski Kumila, Biaunik; Lian Risa Adinda, Ade
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 2, November 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i2.32206

ZnO-TiO2 semiconductor can be used in Dye-Sensitized Solar Cell (DSSC) devices as an alternative to renewable energy. This semiconductor can be synthesized by sol-gel method. The objective of this study is synthesizing the TiO2-doped ZnO nanoparticle semiconductors for DSSC devices with mangosteen peel extract dye. Avocado seeds were extracted with water, as a capping agent in the synthesis of ZnO-TiO2 (TiO2 ratio of 0,3,5,7 and 10% to ZnO). XRD results show the success of ZnO-TiO2 doping, due to the 2θ shift and changes in the crystal lattice. The average crystal size obtained was 33.7972 nm. The SEM results showed that the particle size of ZnO ranged from 45-100 nm. The UV-Vis dye measurements of mangosteen peel extract showed an absorption peak at 296-483 nm wavelength, with a corresponding band gap energy value of 3.04 eV. The UV-Vis DRS ZnO-TiO2 measurements have an average band gap energy of 3.1425 eV and ZnOof 3.1915 eV. The highest DSSC efficiency value is 2.15 x 10-2% at 7% ZnO-TiO2 semiconductor.

Synthesis of Green Diesel from Palm Oil Using Nickel-based Catalyst: A Review Aziz, Isalmi; Sugita, Purwantiningsih; Darmawan, Noviyan; Dwiatmoko, Adid Adep
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 9, No. 1, May 2023
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v9i1.26488

Petroleum is the primary energy that is generally used throughout the world. Its non-renewable nature and exhaust gas emissions that can damage the environment are a concern for developing environmentally friendly renewable energy. Green diesel is an alternative energy to replace diesel fuel (diesel) from petroleum which has the potential to be developed. The raw material in palm oil has great potential for development due to its relatively high production. Green diesel synthesis can be carried out using the catalytic deoxygenation method. The type of raw material, catalyst, and process conditions influences this method. The catalyst is the most influential factor in catalytic deoxygenation. Transition metal catalysts like nickel are inexpensive and have good catalytic activity like precious metals. Catalytic activity can be increased by modifying the catalyst components and optimizing the process. Modification of the catalyst can increase the surface area, Lewis and Bronsted sites, and crystal size so that the resulting green diesel can be maximized, such as Ni-Co, Ni-Zn, and Ni-Mo bimetallic catalysts.

Natural Zeolite as Mo and MoP Catalysts Support for Catalytic Deoxygenation of Jatropha Oil Aziz, Isalmi; Farhan, Muhammad; Saridewi, Nanda; Azizah, Yulyani Nur; Muawanah, Anna; Nurbayti, Siti; Dwiatmoko, Adid Adep; Adhani, Lisa
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 11, No. 1, May 2025
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v11i1.45272

Non-edible oil, such as Jatropha oil, is an interesting feedstock for the development of renewable diesel (green diesel). Catalytic deoxygenation using natural zeolite-supported Mo-based catalysts is a promising process for the conversion of Jatropha oil to green diesel. Mo and MoP catalysts supported on natural zeolite were synthesized by wet impregnation at a concentration of 5% (w/w). The catalysts were characterized by XRD, XRF, SAA and NH3-TPD. The catalysts were successfully synthesized with the appearance of Mo and MoP peaks on the catalyst diffractogram. XRF results also showed that Mo and P were present in the catalyst. Metal impregnation decreased the surface area and pore volume of the catalyst, but increased the average pore diameter. The NH3-TPD profile of the catalyst showed that the weak acid sites of both catalysts were larger than the strong acid sites. Based on the activity test of catalytic deoxygenation of Jatropha oil, the MoP/HZ catalyst produced a higher conversion (67%) and liquid product yield (79%) than Mo/HZ. This is associated with a larger pore diameter, so that the distribution of reactants on the catalyst surface is more optimal. However, the highest green diesel selectivity of 82% is produced by the Mo/HZ catalyst. The Mo/HZ catalyst is more oriented towards the HDO reaction, whereas the MoP/HZ catalyst is more oriented towards the DCO/DCO2 reaction.

Co-Authors Adawiah Adawiah Adawiah Adawiah adawiah adawiah, adawiah Adid Adep Dwiatmoko Agung Setia Nugraha 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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