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All Journal Buletin Udayana Mengabdi Makara Journal of Technology
E. Saputra
Graduate Program in Mechanical Engineering, University of Diponegoro Jl. Prof. Soedarto SH, Tembalang, Semarang 50275 Indonesia, Telp/Fax: +62 24 7460059
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Production Hydrogen And Nanocarbon Via Methane Decomposition Using Ni-Based Catalysts. Effect Of Acidity And Catalyst Diameter Purwanto, Widodo W.; Nasikin, M.; Saputra, E.; Song, L.
Makara Journal of Technology Vol. 9, No. 2
Publisher : UI Scholars Hub

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Abstract

Objectives of this research are mainly to study impacts of acidity strength (by varying amount of precipitant and loading Al-Si) and the effect of nickel particle size (by varying calcinations temperature) on decomposition reaction performances. In this research, high-nickel-loaded catalyst is prepared with two methods. Ni-Cu/Al catalysts were prepared with co-precipitation method. While the Ni-Cu/Al-Si catalyst were prepared by combined co-precipitation and sol-gel method. The direct cracking of methane was performed in 8mm quartz fixed bed reactor at atmospheric pressure and 500-700°C. The main results showed that the Al content of catalyst increases with the increasing amount of precipitant. The activity of catalyst increases with the increasing of catalyst’s acidity to the best possible point, and then increasing of acidity will reduce the activity of catalyst. Ni-Cu/4Al and Ni-Cu/11Al deactivated in a very short time hence produced fewer amount of nanocarbon, while Ni-Cu/15Al was active in a very long period. The most effective catalyst is Ni-Cu/22Al, which produced the biggest amount of nanocarbon (4.15 g C/g catalyst). Ni catalyst diameter has significant effect on reaction performances mainly methane conversion and product yield. A small Ni crystal size gave a high methane conversion, a fast deactivation and a low carbon yield. Large Ni particle diameter yielded a slow decomposition and low methane conversion. The highest methane conversion was produced by catalyst diameter of 4 nm and maximum yield of carbon of 4.08 g C/ g catalyst was achieved by 15.5 nm diameter of Ni catalyst.
PEMANFAATAN BUAH NANGKA SEBAGAI CEMILAN OLEH-OLEH KHAS DESA SRI MENANTI Evanne, Lovia; Saputra, E.; Nesta, A.R.A.; Haq, A.N.; Paramitha, D.; Adelia, N.
Buletin Udayana Mengabdi Vol 23 No 4 (2024): Buletin Udayana Mengabdi
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BUM.2024.v23.i04.p14

Abstract

This community service activity is part of the 2023 KKN activities for Muhammadiyah University Kotabumi students which will be held on January 31 2023 – March 2 2023 in Sri Menantiu Village, Tanjung Raja District, North Lampung Regency. This service activity is carried out for the home industry of chips with the aim of increasing the welfare of life and to overcome the abundance of jackfruit in Sri Menanti and Tanjung Raja. By innovating in the form of processed jackfruit into snack chips as a variation of selling chips. The process of making jackfruit chips is assisted by one of the well-known jackfruit chip owners in Sri Menanti village, namely Mrs. Siti. The method of implementing the activity begins with students collecting data through direct observation. The object of observation is direct interviews with related parties, direct practice, and secondary data collection. Keywords: chips, jackfruit, jackfruit chips, fried food, home industry
Co-Authors Adelia, N. Evanne, Lovia Haq, A.N. Nasikin, M. Nesta, A.R.A. Paramitha, D. Purwanto, Widodo W. Song, L.