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All Journal Jurnal Sains Materi Indonesia Piston: Journal of Technical Engineering Scientific Contributions Oil and Gas
Bambang Priyono
Departemen Teknik Metalurgi Dan Material, Universitas Indonesia
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Utilization of Recycled PP-Talc Waste into Composite Products with the Hot Melt Mixing Method Muhammad Ariya Afif; Muhammad Nicko Azharry Setyabudi; Mochamad Chalid; Bambang Priyono
Piston: Journal of Technical Engineering Vol 5, No 2 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (9925.661 KB) | DOI: 10.32493/pjte.v5i2.19494

Abstract

Polypropylene (PP) is one type of plastic material often used. As the materials' specifications get higher, PP is combined with other materials to achieve the desired characteristics. One of them is Talc. Behind its significant growth, there is one main problem, namely the mismanagement of plastic waste that causes environmental pollution. Therefore, one method that can overcome this problem is the recycling method. This research was conducted to investigate the characterization between pure and recycled materials and the optimum composition obtained to get finished goods that were close to materials using pure materials. This research was conducted using PP-Talc scrap with 20% and 30% talc content, then combined with dry and hot melt mixing methods. The alloy material was then tested using a Scanning Electronic Microscope (SEM), Universal Testing Machine (UTM), and Simultaneous Thermal Analyzer (STA). The results showed that the recycled material's morphological changes, mechanical properties, and thermal properties almost resembled the pure material. Specific ratios of 20% and 30% recycled PP-Talc gave rise to new morphological changes and mechanical properties.
SINTESIS LITHIUM TITANAT DENGAN METODE HIDROTERMAL DAN EFEK SUHU SINTERING PADA KARAKTERISTIK NANO STRUKTURNYA Bambang Priyono; Juliadi Juliadi; Anne Zulfia Syahrial; Evvy Kartini
Jurnal Sains Materi Indonesia Vol 17, No 1: OKTOBER 2015
Publisher : Center for Science & Technology of Advanced Materials - National Nuclear Energy Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (544.626 KB) | DOI: 10.17146/jsmi.2015.17.1.4195

Abstract

SINTESIS LITHIUM TITANAT DENGAN METODE HIDROTERMAL DAN EFEK SUHU SINTERING PADA KARAKTERISTIK NANO STRUKTURNYA. Lithium titanat merupakan salah satu senyawa yang digunakan sebagai material anoda pada baterai lithium ion. Senyawa ini disintesis dengan mencampurkan TiO2 anatase dan lithium karbonat (Li2CO3) dan diproses menggunakan metode hidrotermal pada suhu 120 oC selama 15 jam, selanjutnya disinter pada tiga variasi suhu sintering yaitu 550 oC, 650 oC dan 750 oC untuk menghasilkan LTO fasa spinel kristalin. TiO2 anatase yang dipakai dibuat dengan metode sol-gel dengan suhu kalsinasi 300 oC selama 2 jam. Senyawa yang dihasilkan diamati dengan menggunakan X-Ray Diffraction (XRD), Brunauer Emmet Teller (BET), Spektroskopi Infra Merah (FT-IR) dan Field Emission Scanning Electron Microscope (FE-SEM). Hasil foto mikrograf FE-SEM memperlihatkan padatan senyawa lithium titanat (Li4Ti5O12), Li2TiO3, dan sisa TiO2 rutile dengan struktur morfologi tidak beraturan sebagai aglomerat. Hasil XRD dan BET menunjukkan bahwa pada suhu sintering 550 oC dihasilkan ukuran kristalit ratarata 23,45 nm, luas permukaan 6,65 m2/g, dan didominasi oleh TiO2 rutile, sementara suhu sintering 650 oC dihasilkan ukuran kristalit rata-rata 27,70 nm, luas permukaan 1,91m2/g, dan masih didominasi oleh TiO2 rutile dan pada suhu 750 oC dihasilkan ukuran kristalit rata-rata 52,06 nm, luas permukaan sangat kecil, dan didominasi oleh litihum titanat (Li4Ti5O12). Hasil FT-IR mengkonfirmasikan keberadaan LTO spinel pada padatan hasil sintering. Ukuran kristalit yang diperoleh dalam kisaran di bawah 100 nm, sesuai dengan tujuan penelitian ini.
Utilization of Recycled PP-Talc Waste into Composite Products with the Hot Melt Mixing Method Muhammad Ariya Afif; Muhammad Nicko Azharry Setyabudi; Mochamad Chalid; Bambang Priyono
Piston: Journal of Technical Engineering Vol 5, No 2 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v5i2.19494

Abstract

Polypropylene (PP) is one type of plastic material often used. As the materials' specifications get higher, PP is combined with other materials to achieve the desired characteristics. One of them is Talc. Behind its significant growth, there is one main problem, namely the mismanagement of plastic waste that causes environmental pollution. Therefore, one method that can overcome this problem is the recycling method. This research was conducted to investigate the characterization between pure and recycled materials and the optimum composition obtained to get finished goods that were close to materials using pure materials. This research was conducted using PP-Talc scrap with 20% and 30% talc content, then combined with dry and hot melt mixing methods. The alloy material was then tested using a Scanning Electronic Microscope (SEM), Universal Testing Machine (UTM), and Simultaneous Thermal Analyzer (STA). The results showed that the recycled material's morphological changes, mechanical properties, and thermal properties almost resembled the pure material. Specific ratios of 20% and 30% recycled PP-Talc gave rise to new morphological changes and mechanical properties.
Techno-Economic Analysis of Dme Implementation in Indonesia’s Household Energy Sector Faqih Supriyadi; Irawan Adhi Putra; Riva Yudha Abriyant; Danang Sismartono; Cahyo Setyo Wibowo; Bambang Priyono
Scientific Contributions Oil and Gas Vol 48 No 2 (2025)
Publisher : Testing Center for Oil and Gas LEMIGAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29017/scog.v48i2.1804

Abstract

Indonesia's increasing demand for Liquefied Petroleum Gas (LPG) – projected to reach 13.2 million tonnes by 2050 – and its heavy dependence on imports, require alternative and sustainable fuel solutions. Among the options under development, researchers and industry stakeholders consider Dimethyl Ether (DME)—particularly from abundant domestic low-rank coal—a viable and strategic substitute. DME has physicochemical properties similar to LPG, as well as its compatibility with existing storage and distribution infrastructure. This comprehensive study evaluates the techno-economic aspects of replacing LPG with coal-based DME in the household sector. The factors analyzed include energy equity, production and distribution costs, and projected fiscal impacts on the national economy. Assuming a production capacity of 1.4 million tons per year and an Internal Rate of Return (IRR) of 12%, analysts estimate DME’s Free-On-Board (FOB) price at IDR 8.03 million per ton, with a benchmark price equivalent to LPG at IDR 16,666/kg. At this rate, replacing imported LPG with domestic DME can save the country's foreign exchange around IDR10.71 trillion per year, but has the potential to increase subsidies by IDR3.97 trillion. The government can use the foreign exchange savings to cover the potential increase in DME subsidies.
Co-Authors Anne Zulfia Cahyo Setyo Wibowo Danang Sismartono Evvy Kartini Faqih Supriyadi Irawan Adhi Putra Juliadi Juliadi Mochamad Chalid Muhammad Ariya Afif Muhammad Nicko Azharry Setyabudi Riva Yudha Abriyant