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All Journal METANA Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur)
Rosmawati Sipayung
Program Studi Teknik Kimia, Fakultas Sains dan Teknologi, Universitas Jambi
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering

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Sintesis Katalis SO4/Fe2O3-MgO melalui Iradiasi Microwave Dibandingkan dengan Pemanasan Konvensional untuk Produksi Metil Ester Tamami Nukma Mujnadila; Rahma Amalia; Lea Aprilyani; Rosmawati Sipayung; Sri Mundarti; Nita Widyastuti; Nazarudin Nazarudin; Oki Alfernando; Ira Galih Prabasari
METANA Vol 22, No 1 (2026): Juni 2026
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/metana.v22i1.79983

Abstract

Konversi katalitik minyak jelantah merupakan landasan produksi biodiesel berkelanjutan, di mana metode sintesis katalis yang efisien sangat menentukan karakteristik material akhir. Studi ini mengkomparasi katalis bifungsional SO₄/Fe₂O₃-MgO yang disintesis melalui iradiasi gelombang mikro (microwave) dan pemanasan konvensional. Karakterisasi material mengungkapkan perbedaan struktural yang signifikan, dimana katalis berbasis microwave (M) menunjukkan keunggulan pada analisa pola difraktogram dengan puncak difraksi yang tajam, pita S-O yang lebih signifikan, serta morfologi partikel yang seragam. Sebaliknya, katalis konvensional (H) memperlihatkan fenomena pelebaran puncak difraksi (peak broadening), pita S-O yang lebih lantai, dan morfologi yang tidak seragam. Pada kondisi reaksi 65°C dan rasio molar 1:12, kedua katalis menghasilkan yield metil ester yang sebanding (~86,5%). Namun, sintesis microwave menawarkan keunggulan berupa pengurangan waktu preparasi sintesis katalis dari 17 jam menjadi 30 menit.
Pengaruh Variasi Bleaching terhadap Kualitas Selulosa TKKS dan Aplikasinya pada Sintesis Film CMC/Pati Nita Berliana Purba; Rara Ayu Lestary; Ra'ida Ra'ida Raudhatussya'rifah; Rosmawati Sipayung; Sri Mundarti
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 8 (2025): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Abstract

Carboxymethyl cellulose (CMC) derived from oil palm empty fruit bunches (OPEFB) and starch was utilized to develop composite films. The research aimed to evaluate the effects of bleaching parameters on the quality of cellulose extracted from OPEFB and its subsequent application in CMC/starch composite film synthesis. OPEFB biomass underwent delignification followed by bleaching at liquid–solid ratios of 1:10 and 1:20. The purified cellulose was converted into CMC through alkylation and carboxymethylation reactions. Composite films were fabricated using the solution casting method with starch as a blending component and glycerol as a plasticizer. Physicochemical characterization included analysis of cellulose and lignin contents, brightness measurements, and structural identification using FTIR spectroscopy. Results revealed that bleaching at the 1:20 ratio produced higher cellulose purity, lower residual lignin levels, and greater brightness compared to the 1:10 ratio. FTIR spectra confirmed the removal of lignin and the successful formation of CMC through the presence of characteristic functional groups. Composite films produced from CMC obtained at the 1:20 bleaching ratio exhibited homogeneity and performance. These findings indicate that optimizing bleaching conditions is essential to obtaining high-quality CMC from OPEFB and demonstrate the potential of this biomass-derived material for sustainable biodegradable composite film applications for packaging purposes.
Co-Authors Ira Galih Prabasari Lea Aprilyani Nazarudin Nazarudin Nita Berliana Purba Nita Widyastuti Oki Alfernando Ra'ida Ra'ida Raudhatussya'rifah Rahma Amalia Rara Ayu Lestary Sri Mundarti Tamami Nukma Mujnadila