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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI Jurnal Bahan Alam Terbarukan Indonesian Journal of Science and Technology Konversi
Rinny Jelita
Program Studi Teknik Kimia Fakultas Teknik Universitas Lambung Mangkurat Jl. A. Yani Km. 36 Banjarbaru Kalimantan Selatan 70714 Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Materials Science & Nanotechnology

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Journal : Konversi

 1 
PYROLYSIS OF CASSAVA BAGASSE INTO BIO-OIL USING Ni/NZA CATALYSTS Jefriadi Jefriadi; Syaiful Bahri; Sunarno Sunarno; Rinny Jelita
Konversi Vol 8, No 2 (2019): Oktober 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v8i2.7194

Abstract

Cassava bagasse is a solid tapioca industry waste that can be used as an energy source. In this study, cassava bagasse was pyrolyzed to produce bio-oil and studied the effect of Ni/NZA catalysts on yield, heating value and distribution of bio-oil products. The making of Ni/NZA catalyst starts with the process of activating natural zeolite to produce natural zeolite activated (NZA). Furthermore, impregnation of Ni metals in NZA with Ni levels 1, 2 and 3% w/w (Ni/NZA). The next step is calcination, oxidation and reduction. Cassava is peeled, shredded, washed, filtered and dried and then mashed and screened with a 60 and 80 mesh sieve to obtain cassava bagasse biomass with a size of -60+80 mesh. 50 grams of cassava bagasse with 500 ml silinap and 1.5 gram Ni/NZA catalyst are pyrolyzed at 320oC with nitrogen gas flow of 80 mL/min. Bio-oil products are analyzed by the heating value and distribution of the products. The yield of bio-oil obtained on pyrolysis using 0% Ni/NZA was 54.27% and pyrolysis using 2% Ni/NZA obtained the highest yield of 61.87%. The highest bio-oil heating value was obtained in pyrolysis using 0% Ni/NZA which is 46.78 MJ/kg and lower with increasing Ni levels in NZA. The results of GC-MS analysis of the bio-oil products showed that the use of 1% Ni/NZA catalyst significantly increased the percent area of several components i.e. 2,4,4-trimethy-l-1-Pentene, 2,5-dimethyl-2,4-Hexadiene, and 2,4,4-trimethyl-2-Pentene and decreases the percent area of some other components i.e. 1-bromo-3-methyl-Cyclohexane, 2-methyl-1-Propene,tetramer, 1-(1,1-dimethylethoxy)-3-methyl-Cyclohexene and 3-(3,3-dimethylbutyl)-Cyclohexanone.
STUDI KINETIKA PIROLISIS SEKAM PADI: PERBANDINGAN MODEL KINETIKA Rinny Jelita; Hesti Wijayanti; Jefriadi Jefriadi
Konversi Vol 7, No 2 (2018): Oktober 2018
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v7i2.6496

Abstract

Abstrak: Peningkatan populasi dunia menuntut penambahan kebutuhan energi yang kian langka sehingga dibutuhkan sumber energi alternatif seperti bio oil. Sekam padi yang berupa limbah dapat diolah menghasilkan bio oil melalui proses pirolisis yang sederhana dan ramah lingkungan. Penelitian ini bertujuan mempelajari reaksi dekomposisi sekam padi pada proses pirolisis dan mendapatkan parameter kinetika yang terlibat dalam reaksi pirolisis sekam padi. Sekam padi dihaluskan dan diayak hingga berukuran 0,25-1 mm, dikeringkan menggunakan oven dengan suhu 80˚C selama 180 menit dan dimasukkan ke dalam reaktor pirolisis sebanyak 500 gram. Proses pirolisis berlangsung sejak suhu kamar hingga 1 jam setelah suhu tercapai, yaitu pada suhu 550oC. Asap yang terbentuk dikondensasikan, ditampung sebagai bio oil dan dicatat setiap 10 menit sejak tetesan pertama keluar hingga waktu pirolisis selesai. Berat bio oil  yang dihasilkan digunakan untuk mensimulasikan perubahan massa sekam padi selama pirolisis berlangsung. Penentuan parameter kinetika dilakukan dengan membandingkan tiga model kinetika. Hasil penelitian menunjukkan bahwa pirolisis sekam padi berlangsung mengikuti mekanisme reaksi orde satu dengan parameter kinetika pre-exponensial faktor (A) 0,0347 s-1 dan energi aktivasi (E) 27,9517 kJ/mol. Parameter kinetika yang menghubungkan harga konstanta laju reaksi dengan suhu mengikuti persamaan Arhenius. Kata kunci: dekomposisi, kinetika, pirolisis, sekam padi 
EFFECT OF TEMPERATURE AND BLENDING RATIO TO PRODUCT DISTRIBUTION OF CO-PYROLYSIS LIGNITE AND PALM KERNEL SHELL Rinny Jelita; Jefriadi Jefriadi; Muhammad Jauhar Mahdi; Muhammad Hafiz
Konversi Vol 10, No 2 (2021): Oktober 2021
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v10i2.11686

Abstract

The issue of the energy crisis and environmental problems due to waste encourage the formation of new fuels from renewable materials such as palm kernel shell biomass (CKS). In other hand, low rank coal (lignite) has low economic value, so it needs to be improved to be used widely. Utilization of lignite and CKS can produce solid products (char) in the form of hybrid coal through the co-pyrolysis process. This study aims to determine the optimum temperature and composition of co-pyrolysis lignite and CKS based on the distribution of the resulting product. The lignite is dried and pulverized to a particle size of 20-50 mesh. CKS cleaned, cut into pieces and sieved to a size of 0.4-2 mm. Then the CKS was dried in an oven at 105oC for 24 hours. Lignite and CKS were mixed with a composition of 15%, 22.5%, and 30% by weight of CKS:lignite. The mixture of materials is put into the co-pyrolysis reactor as much as 200 grams. The co-pyrolysis process was carried out at temperatures of 200ºC, 300ºC, and 400ºC for 1 hour by flowing nitrogen gas into the reactor with a flow rate of 1.5 L/min. The results showed that increasing the mixing ratio of CKS:lignite and co-pyrolysis temperature would increase tar yield while decreasing char yield. Judging from the highest tar yield, the optimum co-pyrolysis temperature was 400oC at 15% optimum mixing ratio, while 200oC and 22.5% were optimum co-pyrolysis temperatures and mixing ratio to obtain the largest char yield. Both tar and char co-pyrolysis products can be an alternative energy source with further processing.
Co-Authors Chairul Irawan Hesti Wijayanti Hesti Wijayanti Iryanti Fatyasari Nata, Iryanti Fatyasari Jefriadi Jefriadi Lydia Rahmi Meda Nur Anisa Meilana Dharma Putra Mita Oktaviani Muhammad Hafiz Muhammad Jauhar Mahdi Muhammad Jauhar Mahdi Sunarno Sunarno SYAIFUL BAHRI