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All Journal Eksakta : Berkala Ilmiah Bidang MIPA Pena Justisia: Media Komunikasi dan Kajian Hukum Jurnal Pemerintahan dan Politik Jurnal Penelitian Agrosamudra Waraqat : Jurnal Ilmu_Ilmu Keislaman Ta’wiluna: Jurnal Ilmu Al-Qur’an,Tafsirdan Pemikiran Islam Jurnal Cakrawala Ilmiah Jurnal Ilmu Komunikasi UHO : Jurnal Penelitian Kajian Ilmu Komunikasi dan Informasi MILRev: Metro Islamic Law Review Jambura Jurnal Ilmu Komunikasi Aceh Journal of Electrical Engineering and Technology Jurnal Risalah Addariyah: Studi Ilmu-ilmu Keislaman, Pendidikan, dan Sosial Kemasyarakatan JURISTA : Jurnal Hukum dan Keadilan International Journal of English Language and Pedagogy Jurnal Kimia Unand Cakrawala: Journal of Religious Studies and Global Society Parewa Saraq: Journal of Islamic Law and Fatwa Review
Syukri
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Journal : Eksakta : Berkala Ilmiah Bidang MIPA

 1 
Synthesis of Kaolinite Nanotubes as Heterogeneous Catalysts for Transesterification Reaction of Waste Cooking Oil into Biodiesel Muhammad Rizki; Fitri, Ernarisa; Syukri Arief; Rahadian Zainul; Syukri
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 04 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss04/545

Abstract

Kaolinite, a naturally abundant clay mineral, possesses a significant surface area and catalytic properties. To enhance its catalytic efficiency, modification into kaolinite nanotubes is necessary, as this transformation increases surface area and porosity. The synthesis of kaolinite nanotubes was achieved through a solvothermal method, incorporating multiple intercalation and rolling processes influenced by ultrasonic waves, subsequently utilizing these nanotubes as heterogeneous catalysts. The resulting kaolinite nanotube catalysts exhibited well-defined nanotube morphology and were applied in the transesterification of waste cooking oil, with variations in methanol-to-oil ratios. The optimal biodiesel yield achieved was 49.84%, obtained after a 3-hour reaction period using a 3% w catalyst at 60 °C, with a methanol-oil ratio of 3:1. This research highlights the potential of kaolinite nanotubes as effective catalysts in biodiesel production.
Kaolinite Nanotubes as Support Catalysts of Sulfuric Acid (H2SO4) for Transesterification Reaction of Waste Cooking Oil into Methyl Ester for Biodiesel Fitri, Ernarisa; Rahadian Zainul; Syukri
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 26 No. 02 (2025): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol26-iss02/577

Abstract

This study aims to improve the catalytic performance of kaolinite by converting it into kaolinite nanotubes and utilizing it as a support for sulfuric acid catalysts. Analysis using XRD and TEM revealed that the kaolinite crystal phase remained stable after being modified with sulfuric acid, while kaolinite nanotubes underwent little structural change. In addition, characterization via FTIR and XRF confirmed the presence of sulfate ions in kaolinite nanotubes and kaolinite after combination with sulfuric acid. Catalytic test on transesterification of used cooking oil under uniform conditions (catalyst 3% w/v, oil to methanol ratio 1:6, temperature 90 °C, and stirring speed 700 rpm) showed that sulfuric acid supported by kaolinite nanotubes gave the best performance, producing methyl ester of 65.01%. These findings indicate that converting kaolinite into nanotubes significantly improves its performance as a catalyst support. Practically, this increase in catalytic activity contributes to the efficiency of used cooking oil-based biodiesel production, which can reduce dependence on virgin vegetable oil raw materials and support waste oil recycling efforts. In addition, the use of cheap and easily available kaolinite-based catalysts can reduce the cost of biodiesel production, making it more competitive as an environmentally friendly fuel.
Co-Authors Abdul Rahman Adenan Ahmad Syarif Ainul Mardiyah Arafi Gunawan Armanda, Dicky Aruni, Fidhia Asyadi, Teuku Murisal Azni Aisyah Bainar, Bainar Djafar, Suriani Ezy, Cantika Mutiara Fachri Hafiz Sitompul Fadhli, Cut Fadli, Agus Fitri, Ernarisa Herri Muliadi Husnul Hotima Ida Friatna Isti Anna Iswahyudi Marzuki Masnun Tahir Mia Yeliandri Muhammad Hakim Habibi Muhammad Rizki Muhammad Yunus Muliadi Mulsir Irawanda Nabila Merriza Nurlaila Amna Nurmasyahyati Nurul Hartini Rahadian Zainul Rinah Ritonga, Muhammad Roni Rizki Afandi Sabriani Safni Sainun Syahban Nur Syahminan Syahminan Syamsul Bahri Syukri Arief Tuzahra, Sakina Upita Septiani Wa Ode Nur Asyifah Wardah Wisnu Bekti Nugraha Yenni Marnita Zilfa Zilfa