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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) JURNAL CRANKSHAFT
Widyarini Widyarini
Politeknik Jambi
Biochemistry, Genetics & Molecular Biology Chemistry Control & Systems Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering

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Synthesis and Characterization of CaO-Zeolite Catalyst by Sonochemical Engineering Method Widyarini Widyarini; Muhammad Djoni Bustan; Sri Haryati
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 7, No 3 (2022): October 2022
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v7.i3.113

Abstract

Calcium Oxide (CaO) loaded on zeolite was categorized as a heterogeneous catalyst. The utilization of CaO catalyst could be implemented in catalytic pyrolysis enhance gaseous production. In this paper, CaSO4.2H2O is an active site embedded in natural zeolite, and the activity of the CaO-Zeolite catalyst is synthesized by a sonochemical impregnation-assisted drying process and calcination. The stirrer impregnation method was used as a control. CaO-Zeolite catalyst characterization and properties were identified via Scanning Electron Microscopy- Energy Dispersive X-Ray (SEM-EDX).The activation experiments were performed at an oven temperature of 120oC for 5 h and a calcination temperature of 300oC for 2 h. The synthesized catalysts of sonochemical were performed at 20 minutes, 20 kHz, and 1200 Watt, and the synthesized catalyst of stirrer were performed at 120 minutes, 1500 rpm, and 1000 watts. The experimental results revealed that the characterization of the catalysts prepared by the sonochemical method was better than that of the stirrer. Specifically, obtained CaO-Zeolite catalyst with Ca wt % increased from 0.86 wt% NZ (natural zeolite)  to (11.3 wt%, 14.15 wt% and 23.48 wt%) of sonochemical and (11.82wt%, 13.95 wt% and 20.64wt%) of stirrer. The results demonstrated that Ca wt%  by sonochemical in 20 minutes dispersed at support surface (zeolite)  more effective than stirrer in 120 minutes. These results were impacted by acoustic cavitation and shockwave of ultrasonic on solid-liquid transport and distribution. On the other side, sonochemical assisted the activation technique to minimize particle size and allowed metal oxide (CaSO4.2H2O) to be dispersed uniformly into the pores structure of the zeolite. The utilization of sonochemical in CaO-Zeolite synthesizing enhanced catalyst activity. Keywords: CaO/Zeolite catalyst, Calcination, Drying, Sonochemical Impregnation, Ca weight percentage, Characterization
Rancang Bangun Mesin Pengupas Kulit Kentang Widyarini, Widyarini; Sukadi, Sukadi; Porawati, Hilda
JURNAL CRANKSHAFT Vol 7, No 3 (2024): Jurnal Crankshaft Vol.7 No.3 (2024)
Publisher : Universitas Muria Kudus

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Abstract

Kentang merupakan salah satu jenis tanaman holtikultura yang dikonsumsi umbinya. Pada industri rumahan proses pengupasan masih manual atau menggunakan tangan sehingga memerlukan tenaga dan waktu yang cukup lama. Tujuan penelitian ini adalah mendesain dan membuat mesin untuk mempercepat proses pengupasan. Dalam0rancang bangun mesin pengupas kulit kentang dihitung berdasarkan kapasitas mesin agar kualitas dari proses produksi tetap terjaga. Bagian mesin tersebut meliputi motor listrik, tabung0pengupas dan rangka.Mesin tersebut0menjadikan motor listrik (AC) sebagai sumber0putaran0yang0diperoleh poros. Kapasitas produksi yang direncanakan untuk sekali proses pengupasan adalah 10 kg. Untuk itu dibutuhkan penggerak mesin pengupas kulit kentang dengan kecepatan 1400 rpm. Berdasarkan hasil rancangan dan uji coba maka daya motor listrik yang dibutuhkan sebesar 450 watt tegangan 220 V dengan variasi pulley 3 inch, 3 inch, sehingga dapat dicapai hasil putaran motor listrik sebesar 1400 rpm dengan0kapasitas pengupasan 100 kg/jam. Dari hasil pengujian dengan  rasio diameter pulley penggerak dengan diameter pulley yang menggerakkan didapat waktu pengupasan yang optimal pada 1400 rpm dibanding 600 rpm dan 800 rpm.Kata0kunci : Kentang, Motor Listrik, Pulley, Tegangan, Kapasitas,
Co-Authors Hilda Porawati Muhammad Djoni Bustan Sri Haryati Sukadi Sukadi