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All Journal Makara Journal of Technology jes
M. Nizar Machmud
Universitas Syiah Kuala
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Apparent Porosity and Compressive Strength of Heat-Treated Clay/Iron Sand/Rice Husk Ash Composites over a Range of Sintering Temperatures Machmud, M. Nizar; Jalil, Zulkarnain; Afifuddin, Mochammad
Makara Journal of Technology Vol. 20, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Novel composites of clay/iron sand/rice husk ash (RHA) have been developed. Electric furnace was used to perform heat treatment on the composites to study the effect of sintering temperature on their apparent porosity and compressive strength. Two types of RHA with different bulk density were prepared to gain an understanding of the influence of apparent porosity on compressive strength of the heat-treated composites over a range of sintering temperatures. Heattreated composites, made of clay/iron sand and clay/RHA, were also prepared as a referenced material. X-ray diffraction (XRD) analysis was further performed to comprehensively discuss the role of iron sand on apparent porosity and compressive strength of the heat-treated composites. The results show that the increase of sintering temperature reduces apparent porosity of the heat-treated composites. Reducing on the apparent porosity was then followed by the increase of compressive strength of the heat-treated composites. Compressive strength of the heat-treated composites was not sensitive to the sintering temperature up to 800 °C, and it would be more improved at the sintering temperature above 800 °C. This study concludes that such sintering temperature significantly improved apparent porosity and compressive strength of the composites due to use of iron sand.
Limbah Tempurung Kelapa diuji Guna Menjadi Bahan Bakar Alternatif Arhami; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.2

Abstract

Pyrolysis is a thermo-chemical which decomposition of organic material through heating process with absent or little oxygen (anaerobic). The purposes of study are design pyrolyzer of coconut shell being to alternative fuels, knowing much of oil from pyrolysis process with method of counter flow and parallel flow, and knowing heat energy or caloric energy which was produced from pyrolysis process with method of counter flow and parallel flow in condenser. The research with through experiments the pyrolyzer which includes reactor, distribution pipe, and condenser. Research methods are the experiment of pyrolysis process at temperature 35oC during 60 minutes with condensation method, counter flow and parallel flow. Results of experiments are data of gas fuels mass obtained 42 grams which used pyrolysis process of coconut shell in the amount of 1000 gr, until produces pyrolysis oil as 198 grams (counter flow) and 196 grams (parallel flow). Counter flow method can absorb a heat as 1304,762 kJ and heat loss through gasses as 462,842 kJ, even though parallel flow no more than absorb as 1200,83 kJ and heat loss through gasses as 545,271 kJ.
Bahan Bakar Minyak Dari Berbagai Metode Konversi Sampah Plastik Ibrahim, Masri; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.3

Abstract

The use of plastic and goods made of plastic have been rising in day to day. Increasing use of plastics is a consequence of the development of technology, industry and population. On one hand, the invention of plastic has a remarkable positive impact, because it has many advantages compared to other materials. But on the other hand, the plastic waste has negative impact that too worried, so its solutions need to be looked for. One of the alternative handling of plastic waste that currently extensively researched and developed is converting plastic waste into fuel. Converting plastic waste into fuel oil can be done with cracking process. There are three kinds of process that is hydro cracking, thermal cracking and catalytic cracking. Fuel oil produced from the cracking of plastic waste depending on the plastic type, cracking process used, catalyst type, pyrolisis temperature and condenser temperature.
Eksperimen Pengaruh Kecepatan Pada Diameter Nozzle 2,5 mm dalam Proses Laser Cutting Masri; Suhaeri; Machmud, M. Nizar; Zainuddin; Saifuddin; Azhar
Journal of Engineering and Science Vol. 2 No. 2 (2023): July-December 2023
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v2i2.168

Abstract

This experimental study examines the impact of speed variations on the 2.5 mm nozzle diameter in low-carbon steel laser cutting. The primary objective is to optimize the roundness of the cut by considering cutting speed factors. Through a series of experiments conducted on low-carbon steel plates measuring 200 mm x 200 mm, utilizing a 2.5 mm nozzle diameter with speed variations of 2, 3, and 4 m/minute, the research measures roundness quality using a digital caliper. Results indicate that cutting speed influences roundness quality, with the lowest deviation observed at a speed of 2 m/minute and the highest at 3 m/minute. The study also highlights that increased cutting speed and the use of a larger nozzle require higher gas pressure.
Limbah Tempurung Kelapa diuji Guna Menjadi Bahan Bakar Alternatif Arhami; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.2

Abstract

Pyrolysis is a thermo-chemical which decomposition of organic material through heating process with absent or little oxygen (anaerobic). The purposes of study are design pyrolyzer of coconut shell being to alternative fuels, knowing much of oil from pyrolysis process with method of counter flow and parallel flow, and knowing heat energy or caloric energy which was produced from pyrolysis process with method of counter flow and parallel flow in condenser. The research with through experiments the pyrolyzer which includes reactor, distribution pipe, and condenser. Research methods are the experiment of pyrolysis process at temperature 35oC during 60 minutes with condensation method, counter flow and parallel flow. Results of experiments are data of gas fuels mass obtained 42 grams which used pyrolysis process of coconut shell in the amount of 1000 gr, until produces pyrolysis oil as 198 grams (counter flow) and 196 grams (parallel flow). Counter flow method can absorb a heat as 1304,762 kJ and heat loss through gasses as 462,842 kJ, even though parallel flow no more than absorb as 1200,83 kJ and heat loss through gasses as 545,271 kJ.
Bahan Bakar Minyak Dari Berbagai Metode Konversi Sampah Plastik Ibrahim, Masri; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.3

Abstract

The use of plastic and goods made of plastic have been rising in day to day. Increasing use of plastics is a consequence of the development of technology, industry and population. On one hand, the invention of plastic has a remarkable positive impact, because it has many advantages compared to other materials. But on the other hand, the plastic waste has negative impact that too worried, so its solutions need to be looked for. One of the alternative handling of plastic waste that currently extensively researched and developed is converting plastic waste into fuel. Converting plastic waste into fuel oil can be done with cracking process. There are three kinds of process that is hydro cracking, thermal cracking and catalytic cracking. Fuel oil produced from the cracking of plastic waste depending on the plastic type, cracking process used, catalyst type, pyrolisis temperature and condenser temperature.
Eksperimen Pengaruh Kecepatan Pada Diameter Nozzle 2,5 mm dalam Proses Laser Cutting Masri; Suhaeri; Machmud, M. Nizar; Zainuddin; Saifuddin; Azhar
Journal of Engineering and Science Vol. 2 No. 2 (2023): July-December 2023
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v2i2.168

Abstract

This experimental study examines the impact of speed variations on the 2.5 mm nozzle diameter in low-carbon steel laser cutting. The primary objective is to optimize the roundness of the cut by considering cutting speed factors. Through a series of experiments conducted on low-carbon steel plates measuring 200 mm x 200 mm, utilizing a 2.5 mm nozzle diameter with speed variations of 2, 3, and 4 m/minute, the research measures roundness quality using a digital caliper. Results indicate that cutting speed influences roundness quality, with the lowest deviation observed at a speed of 2 m/minute and the highest at 3 m/minute. The study also highlights that increased cutting speed and the use of a larger nozzle require higher gas pressure.
Co-Authors Ali, Masri ARHAMI Azhar Masri Masri Ibrahim Mochammad Afifuddin Saifuddin Suhaeri Zainuddin Zulkarnain Jalil