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Anerasari Meidinariasty
Chemical Engineering Department, State Polytechnic of Sriwijaya, Palembang 30139, Indonesia
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Journal : Serambi Engineering

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Optimalisasi Silika Gel Dari Sekam dan Jerami Padi Ditinjau Dari Rasio Bahan Baku dan Konsentrasi H2SO4 dengan Metode Ekstraksi Permata Sari, Shefia Dian; Meidinariasty, Anerasari; Apri Mujiyanti
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This research aims to optimize silica gel synthesis from rice husk and rice straw through variations in raw material ratio and sulfuric acid concentration. Silica gel was produced through alkaline extraction using NaOH followed by precipitation with H₂SO₄. Variations in husk–straw composition (100:0, 75:25, 50:50, 25:75) and H₂SO₄ concentrations (1 M, 2 M, 3 M) were tested to evaluate their effects on moisture content, water vapor adsorption capacity, pH, and functional groups by FTIR. Results show that the 75% husk–25% straw ratio with 3 M H₂SO₄ yields the optimal silica gel characteristics, including the lowest moisture content, highest adsorption capacity, and stable pH. FTIR analysis confirms the formation of silanol and siloxane functional groups, indicating successful synthesis. This study demonstrates that agricultural waste can be converted into high-quality silica gel through optimized extraction parameters.
Analisis Pengaruh Asam Organik dari Cangkang Kelapa dengan Metode Pirolisis Terhadap Proses Reduksi Scale di Industri Minyak Putri, Aninda Arik Tanza; Meidinariasty, Anerasari; Ekawati, Linda
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Scale problems in the oil industry have become a serious challenge because they can clog piping systems and reduce operational efficiency. This study aims to evaluate the effectiveness of organic acids from coconut shell pyrolysis as an environmentally friendly scale reducer and compare it with HCl solutions at various concentrations. Pyrolysis was carried out at a temperature of 500°C for 30 minutes to produce bio-oil rich in phenolic compounds and organic acids. Characterization using GC-MS showed the dominance of phenol compounds, 2-methoxy phenol, and 2,6-dimethoxy phenol which play an active role in the reduction process. Reduction tests were carried out on Fe₂O₃, Fe₃O₄, and FeSO4-based scales with time variations of 5-40 minutes, and 5-30% HCl as a comparison. The results showed that organic acid was able to reduce scale by up to 36.03% in 40 minutes, equivalent to 15% HCl (37.85% at 20 minutes) and 25% HCl (37.45% at 10 minutes). The optimum effectiveness of organic acid occurred at 30.04% at the 25th minute. Although HCl showed a higher reduction capacity, organic acid was considered safer for the environment and metal infrastructure. This study indicates that bio-oil from coconut shell pyrolysis has potential as a sustainable alternative for scale reduction.
Co-Authors ., Fadarina Alfajri, Ahmad Rizki Alnafrah, Fenty Alpitansyah, Rachmad Bayu Annisa Annisa Apri Mujiyanti Arif Rachman, Muhamad Arizal Aswan Ekawati, Linda Fadillah, Nadia Zaky Gilbert, Amudi Jhon Indah Purnamasari Ismareni, Pepi Kaslum, Leila Luthfiah, Sakinah Miftahul Jannah MUHAMMAD TAUFIK Muhammad Yerizam Mulyadi , Mulyadi Mustain Zamhari Oktaviani, Erika Dwi Permadi, Jekasyah Permata Sari, Shefia Dian Pratama, M.Bagas Putri, Aninda Arik Tanza Retno Monnica dewi Robert Junaidi Selastia Yuliati Syakdani, Adi Tahdid ST.,M.T. Tri Shella Meilan Wijaya, Fadjri Maulana Yuliani, Tasya Dwi Zikri, Ahmad