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All Journal IPTEK The Journal of Engineering
M Aldi Nugroho
Institut Teknologi Sepuluh Nopember
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Mechanical Engineering

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Carbon Dioxide (CO2) Absorption Process Using Sodium Hydroxide (NaOH) M Aldi Nugroho; Yoga Bekti Susanto; Villia Lidzati Kamilah; Regita Prameswari
IPTEK The Journal of Engineering Vol. 9 No. 1 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i1.a15192

Abstract

An absorption process can be carried out to reduce carbon dioxide gas emissions in the surrounding environment. Absorption is a contact process between a mixture of gas and liquid that aims to remove one of the gas components by dissolving it in a suitable liquid. In this study, the CO2 absorption process was carried out to determine the effect of CO2 flow rate on the amount of CO2 absorbed with NaOH absorbent. The results showed that the correlation between CO2 flow rate and absorption factor was inverse because an increase in CO2 flow rate caused the contact between CO2 gas and NaOH to decrease. As a result, the absorption factor decreased because the ratio of CO2 was greater than the absorbent. While the relationship between L/V and the absorption factor is directly proportional if the flow rate of the liquid increases, the retained liquid tends to saturate and can accelerate the diffusion of CO2 in the water, so the absorption factor also increases. In addition, after the absorption of CO2 gas, sodium carbonate is produced, which is the result of the reaction of CO2 with NaOH.
Analysis of The Effectiveness of Household Scale Smart Window Panel as a New Renewable Energy Source Using PVsyst Software M Aldi Nugroho; Salsabila Aminatun Muthmainnah; M. Akbar Miftahuzaman; Yohanes Maruli Arga Septianus; Muhammad Irsyad Ivana Akmal; Muhammad Sholeh; Vincentius Glorio Fransduard Gospely Goldant; Cahyaning Hanum Pertiwi
IPTEK The Journal of Engineering Vol. 9 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i2.a17439

Abstract

Increasing electrical energy consumption causes problems because it produces greenhouse gas emissions. The problem is that the fuel used so far is not renewable. Carbon emissions can trigger global warming. Global warming causes the temperature on earth to increase, causing icebergs in the polar regions to melt and sea levels to rise. Efforts can be made to minimize this problem by transitioning to alternative energy, such as solar panels. Using solar panels as an energy source has an excellent opportunity to be implemented because Indonesia gets sunlight throughout the year. However, solar panels have drawbacks, such as surfaces that are difficult to clean, depending on location and weather conditions, and their installation requires a large area. Therefore, this research was conducted by designing smart window panels that are easy to apply on a household scale so that their effectiveness is known when implemented. The method used in this study is a simulation method using the PVsyst software. The simulation was carried out with a variable angle of installation of the smart window panel, 0°,30°,45°,60°, and 90°. The results showed that the best results were obtained from modules with an installation angle of 90° because the EfrGrid value was 19168 Kw/year and E_Solar was 104.28 Kw/year. Increasing the number of modules used can be done by using suitable inverters so that optimizing the use of smart window panels on the household scale can be done to reduce carbon emissions and achieve energy security in Indonesia.
Carment: Magnesium Cement From Glass Waste As A Solution To The Cement Industry's Carbon Emission Problems Muhamad Bahrul Ulum; Gracella Audrey Toar; Jihad Akbar Hadrani; Erika Desi Cahyani; Zel Andesra; M Aldi Nugroho
IPTEK The Journal of Engineering Vol. 9 No. 2 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v9i1.a15158

Abstract

In dealing with carbon emissions generated from the cement industry in general, the author has the idea to use Carment. Carment is a concept of carbon absorbing cement based on magnesium silicate which is derived from silica and is able to reduce carbon emissions from the manufacturing process compared to the manufacture of cement in general. There are several solutions that have existed in overcoming the problem of carbon emissions from the cement industry, such as the Waste Heat Recovery Power Generator (WHRPG), reducing the clinker ratio through blended cement products, and using alternative fuels to replace coal. However, its existence is still quite expensive and has not been able to overcome the problem of carbon emissions resulting from the cement industry. Carment is an innovation in the industrial sector where Carment as a magnesium cement from glass waste can solve the problem of carbon emissions from the calcination process. The availability of glass waste, which has a high availability, contains more than 70% silica and is inexpensive, increases the potential to produce magnesium cement from glass waste in Indonesia.
Effect of Variation of Adsorbent and pH Doses on Boron Adsorption Using DMAPAA-co-DMAPAAQ Hydrogel M Aldi Nugroho; Alfian Rosyad Tsany; Silma Elvaretta Aska; Dimas Gilang Venanto; Erlangga Ardiansyah; Lulu Sekar Taji; Eva Oktavia Ningrum
IPTEK The Journal of Engineering Vol. 10 No. 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i1.a19154

Abstract

Boron is very dangerous for living things. The boron concentration allowed for drinking water is less than 1 mg/L. If not standard, boron causes nausea, lethargy, diarrhea, vomiting, dermatitis, and a risk of miscarriage in pregnant women. Thus, this research investigated the effect of variations in adsorbent dosage and pH on boron adsorption using the DMAPAA-co-DMAPAAQ hydrogel. The research began with the hydrogel synthesis process, which continued with the batch-mode sorption study. Based on research results, the higher the adsorbent dosage, the more boron is adsorbed. The highest removal percentage with an adsorbent amount of 0.5 g/L was 19.89% for pH 3, and for an adsorbent dosage of 2 g/L was 19.52% for pH 9. The highest percent removal was at pH 11. The DMAPAA-co-DMAPAAQ hydrogel adsorbent is shown to be environmentally friendly compared to commercial resins because the commercial resins are not biodegradable, making them difficult to recycle, causing more damage to the environment.
OBSAFER: Hydrogen Power Plant from Soybean Straw and Tofu Liquid Waste in Kediri District M Aldi Nugroho; Yohanes Maruli Arga Septianus; Miladia Faizin; Muhammad Dimmas Firdaus; Ahmad Rifaldi Rafi Afwa; Amelia Bahetha; Salsabila Aminatun Muthmainnah
IPTEK The Journal of Engineering Vol. 10 No. 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j23378557.v10i1.a19179

Abstract

Industrial developments result in higher consumption of electrical energy with considerable emissions. Efforts to develop alternative energy are carried out to overcome climate change. Hydrogen, as a clean energy, can be produced from biomass, such as soybean straw waste. The OBSAFER innovation was created to optimize the use of soybean straw and tofu liquid waste in electrical power. The process began with soybean straw waste pre-treated with NaOH and entered into a bioreactor for a dark fermentation process with Clostridium butyricum to produce hydrogen, methane, and carbon dioxide. Then, the gas is separated by a CH4 filter and a CO2 filter, so the main product is hydrogen. The OBSAFER technology can produce 821,751 kWh/year from 21.6 tons of soybean straw waste and Clostridium butyricum from tofu liquid waste.
Co-Authors Ahmad Rifaldi Rafi Afwa Alfian Rosyad Tsany Amelia Bahetha Cahyaning Hanum Pertiwi Dimas Gilang Venanto Erika Desi Cahyani Erlangga Ardiansyah Gracella Audrey Toar Jihad Akbar Hadrani Lulu Sekar Taji M. Akbar Miftahuzaman Miladia Faizin Muhamad Bahrul Ulum Muhammad Dimmas Firdaus Muhammad Irsyad Ivana Akmal Muhammad Sholeh Regita Prameswari Salsabila Aminatun Muthmainnah Silma Elvaretta Aska Villia Lidzati Kamilah Vincentius Glorio Fransduard Gospely Goldant Yoga Bekti Susanto Yohanes Maruli Arga Septianus Zel Andesra