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All Journal Majalah Ilmiah Pengkajian Industri Jurnal Energi dan Lingkungan (Enerlink) Indonesian Journal of Energy Makara Journal of Science International Journal of Renewable Energy Development

Rosyadi, Erlan

Unknown Affiliation

Author-ID : 1493196

Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Transportation

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Articles

PEMANFAATAN PURE PLANT OIL (PPO) DARI KELAPA SAWIT UNTUK MENGURANGI KONSUMSI BAHAN BAKAR SOLAR DI PLTD TALANG PADANG Priyanto, Unggul; Prasetyo, Dwi Husodo; Rosyadi, Erlan; Murti, Galuh Wirama; Hastuti, Zulaicha Dwi; Syaftika, Novi
Majalah Ilmiah Pengkajian Industri Vol 13, No 3 (2019): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Minyak nabati murni (Pure Plant Oil / PPO) dari kelapa sawit dapat digunakan sebagai subtitusi bahan bakar solar pada mesin diesel. PPO dapat digunakan dengan mencampurkannya dengan solar, sehingga mengurangi penggunaan bahan bakar fosil yang tidak ramah lingkungan. Akan tetapi, bahan bakar campuran PPO juga memiliki sisi negatif seperti Specific Fuel Consumption (SFC) yang tinggi, viskositas tinggi, nilai kalor yang rendah, dan emisi NOx yang cenderung sedikit lebih tinggi. Dalam studi ini berbagai campuran PPO dan solar diuji di PLTD. Hasilnya menunjukkan bahwa PPO sebaiknya digunakan dengan campuran solar dan proses pre-heating dilakukan sebelum masuk ke mesin. Penggunaan PPO juga teruji sebagai bahan bakar yang ramah lingkungan, kandungan sulfur yang rendah, serta menghasilkan emisi gas rumah kaca yang rendah. Agar PPO dapat digunakan pada mesin diesel, maka perlu beberapa perubahan seperti modifikasi mesin seperti pre-heating PPO, modifikasi sistem injektor, dual fuelling, dan blending PPO dengan solar. Kata kunci : biofuel, PPO, kelapa sawit, PLTD, performa mesin diesel

EVALUASI PLT BIOGAS TERANTAM COVERED LAGOON (CAL) 700 KW UNTUK PENGEMBANGAN PLT BIOGAS TIPE CSTR Rosyadi, Erlan; Rahmawati, Nurdiah; Pertiwi, Astri; Murti, Galuh Wirama; Fauzan, Naazi; Rini, Tyas Puspita; Muharto, Bambang; Bhaskara, Arya; Saputra, Hens
Majalah Ilmiah Pengkajian Industri Vol 13, No 3 (2019): Majalah Ilmiah Pengkajian Industri
Publisher : BPPT

Production of Crude Palm Oil (CPO) is increasing from year to year and is predicted to reach 41.6 million tons per year in 2018. Each ton of CPO will produce 3,28 m3 of POME during the production process. Improper handling of POME, besides causing soil pollution and flying, will release methane gas that categorized as GHG. BPPT cooperate with PTPN V utilized POME to produce biogas and then be converted into electricity in a Biogas Power Plant (PLTBg) in Terantam with a design capacity of 700 kW. The reactor used is a closed Anaerobic Lagoon (CAL) reactor equipped with a recirculation pump. From the evaluations, the technology chosen was not optimal from the operation, its evaluaed from the accumulation of cakes and sludge collected in the reactor which could be disturb during an anaerobic reaction. The next technology development will be carried out with the development of PLTBg in Sei Pagar using CSTR technology. At the same reactor capacity, CSTR has a faster HRT compared to CAL. CSTR is also easier in control of pH and temperature, also requires less land.Keyword : POME, Biogas, CSTR, Covered Lagoon, HRT, OLR

PEMANFAATAN CPO ASAM LEMAK BEBAS TINGGI SEBAGAI BAHAN BAKAR Dwi Hastuti, Zulaicha; Prasetyo, Dwi Husodo; Rosyadi, Erlan
Jurnal Energi dan Lingkungan (Enerlink) Vol 11, No 1 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Asam lemak bebas (alb) dalam Crude Palm Oil (CPO) merupakan salah satu parameter kualitas CPO.Munculnya asamlemak bebas ini dapat berasal dari faktor pemanenan dan penyimpanan. Asamlemak bebas yang tinggi dalam CPO dapat menurunkan harga CPO. Minyak mentah sawit inimerupakan salah satu sumber energi terbarukan yang diolah, antara lain, menjadi pure plant oil (PPO)dan biodiesel. Namun,masalah utama CPO sebagai bahan baku PPO dan biodiesel adalah asamlemak bebas. Asam lemak bebas dalam CPO yang dapat digunakan untuk PPO dan biodiesel tidakboleh lebih dari 1%. Oleh karena itu, dalam penelitian ini dilakukan usaha untuk menurunkan asamlemak bebas dalam CPO sehingga dapat dimanfaatkan sebagai bahan bakar. Metoda yang digunakanadalah esterifikasi. Asam lemak bebas dikonversi menjadi metil ester. Campuran metil ester dengantrigliserida ini merupakan bahan bakar yang dapat digunakan untuk pengganti BBM. Kondisi yangoptimal untuk proses esterifikasi CPO alb tinggi adalah sebagai berikut : suhu 65oC, waktu 360 menit,katalis 0,25%, dan perbandingan mol metanol 8:1. Dengan proses ini, asam lemak bebas dapatditurunkan menjadi 2,76% (konversi 89,39%). Pada kondisi yang sama dengan katalis yangditingkatkan menjadi 0,5%, asam lemak bebas dapat diturunkan menjadi 1,86% (konversi 92,85%).Pada kondisi yang sama, dengan katalis yang ditingkatkan menjadi 1%, asam lemak bebas dapatditurunkan menjadi 1,75% (konversi 93,28%).Kata kunci: asam lemak bebas, CPO, esterifikasi, PPO, biodiesel

Effect of Temperature and Steam-to-Carbon Monoxide (CO) Ratio on Hydrogen Production in Water-Gas Shift Reaction using Cu-ZnO-Al2O3 Catalyst Desi, Sekar Kumala; Nursa'adah, Restu Siti; Anindita, Hana Nabila; Muharto, Bambang; Rahmawati, Nurdiah; Rini, Tyas Puspita; Rosyadi, Erlan
Makara Journal of Science Vol. 27, No. 4
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

This study investigates the effect of steam-to-CO molar ratio and temperature on hydrogen production in a water gas shift reaction using a Cu-ZnO-Al2O3 catalyst. Herein, different steam-to-CO molar ratios (1:1, 2:1, and 3:1) and temperatures (200 °C, 250 °C, and 300 °C) were applied to investigate their impact on the reaction and H2 production. The Cu-ZnO-Al2O3 catalyst was characterized by its surface area, pore size distribution, and chemical composition. Moreover, the experimental setup enabled the control of temperature and steam-to-CO molar ratio while monitoring the product gas composition. The results revealed a considerable influence of temperature and steam-to-CO molar ratio on CO conversion efficiency. Notably, the majority of the experiment variations exhibited CO conversion exceeding 90% within 1 min throughout the reaction. Additionally, the highest H2 composition of 53.10% was reached at 250 °C with the steam-to-CO molar ratio of 3:1.

Effects of CaO addition into CuO/ZnO/Al2O3 catalyst on hydrogen production through water gas shift reaction Hastuti, Zulaicha Dwi; Rosyadi, Erlan; Anindita, Hana Nabila; Masfuri, Imron; Rahmawati, Nurdiah; Rini, Tyas Puspita; Anggoro, Trisno; Prabowo, Wargiantoro; Saputro, Frendy Rian; Syafrinaldy, Ade
International Journal of Renewable Energy Development Vol 13, No 4 (2024): July 2024
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2024.59257

Hydrogen is a promising renewable energy carrier and eco-friendly alternative to fossil fuels. Water-gas-shift reaction (WGSR) is commonly used to generate hydrogen from renewable biomass feedstocks. Enriching hydrogen content in synthesis gas (syngas) production can be made possible by applying the WGSR after gasification. WGSR can achieve a maximal carbon monoxide (CO) conversion using a commercially patented CZA (Cu/ZnO/Al2O3) catalyst. This study proposed three in-lab self-synthesized CZA catalysts to be evaluated and compared with the patented catalyst performance-wise. The three catalysts were prepared with co-precipitation of different Cu:Zn:Al molar ratios: CZA-431 (4:3:1), CZA-531 (5:3:1) and CZA-631 (6:3:1). The catalysts characteristics were determined through X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis and Scanning Electron Microscopy (SEM) techniques. CO gas was mixed with steam in a catalytic reactor with a 3:1 molar ratio, running continuously through the catalyst at 250 °C for 30 mins. All three catalysts, however, performed below expectations, where CZA-431 had a CO conversion of 77.44%, CZA-531 48.75%, and CZA-631 71.67%. CaO, as a co-catalyst, improved the performance by stabilizing the gas composition faster. The CO conversion of each catalyst also improved: CZA-431 improved its CO conversion to 97.39%, CZA-531 to 96.71%, and CZA-631 to 95.41%. The downward trend of the CO conversion was deemed to be caused by copper content found in CZA-531 and CZA-631 but not in CZA-431, which tended to form a Cu-Zn metal complex, weakening the catalyst's activity.

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

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"

Co-Authors Anggoro, Trisno Arfiana Bhaskara, Arya Desi, Sekar Kumala Dwi Hastuti, Zulaicha Fauzan, Naazi Finalis, Era Restu Hana Nabila Anindita, Hana Nabila Hastuti, Zulaicha Dwi Hens Saputra Masfuri, Imron Muharto, Bambang Murti, Galuh Wirama Noda, Reiji Noor, Ilhamsyah Nursa'adah, Restu Siti Pertiwi, Astri Prabowo, Wargiantoro Prasetyo, Dwi Husodo Priyanto, Unggul Rahmawati, Nurdiah Rini, Tyas Puspita Saputro, Frendy Rian Sri Djangkung, Sumbogo Murti Suratno, Hadi Syafrinaldy, Ade Syaftika, Novi

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