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All Journal Sains Natural: Journal of Biology and Chemistry Chemistry Indonesian Journal of Chemical Research REACTOR : Journal of Research On Chemistry And Engineering
Hapsauqi, Iqbal
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science

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The Comparison Effects of NaOH and KOH as Solvents for Silica Extraction from Two Different Coal Fly Ashes Hanum, Farrah Fadhillah; Rahayu, Aster; Hapsauqi, Iqbal
Indonesian Journal of Chemical Research Vol 10 No 1 (2022): Edition for May 2022
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2022.10-far

Abstract

One of the environmental problems is the waste from the coal combustion process from coal power plants or other industries that use coal as an energy source. The combustion process produces coal fly ash, which will accumulate in the environment. Subsequently, much research about the utilization of coal fly ash has been developed. Silica extraction from coal fly ash is one of the methods that can be used to utilize coal fly ash. This study carried out silica extraction using the Direct Alkaline Leaching (DAL) method. The coal ash was contacted with alkaline solvents (KOH and NaOH) with the variations of concentrations and the leaching time. The leaching solution filtrate will be precipitated with the addition of HCl. The characteristics of this silica from CFA and CFA B were analyzed by using Scanning Electron Microscopy (SEM). Based on the results, it could be known that each of the coal fly ashes has different results for both alkaline solvents. CFA A has relatively less silica extraction results in both types of solvents. Meanwhile, CFA B gave higher silica extraction results with coal fly ash and solvent contact time for one hour.
Comparative Analysis of Coal Quality across Various Coal Basins in Sumatra: A Case Study of Calorific Value, Moisture Content, and Sulfur Content Hanum, Farrah Hanum; Hapsauqi, Iqbal; Jamilatun, Siti; Nirmalasari, Jiran
Indonesian Journal of Chemical Research Vol 12 No 1 (2024): Edition for May 2024
Publisher : Jurusan Kimia, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2024.12-han

Abstract

Indonesia and other countries have used coal as their main energy source for many years. Due to variances in coal formation, maturity, and geological history, each basin may have a range in coal quality. It houses unique coal basins—South Sumatra, Central Sumatra, Riau, and Aceh—each marked by distinct geological features. Variations in coal formation, maturity, and geological history contribute to quality differences. The analysis of coal quality plays a crucial role in determining its suitability for various applications, including power generation, industrial processes, and export purposes. This study focuses on the coal characteristics of Riau (Coal A), Bengkulu (Coal B), South Sumatra (Coal C), and Jambi (Coal D), evaluating parameters such as calorific value, moisture content, and sulfur content. Employing ASTM-based analysis methods, results reveal that Coal D exhibits the lowest sulfur but has a diminished calorific value, while Coal A boasts a higher calorific value but the highest total sulfur content. Understanding such distinctions is crucial for determining coal's suitability for diverse applications like power generation, industrial processes, and exports. Hopefully, this research could help in estimating the economic potential of these basins, identifying areas with higher-quality coal, and planning future exploration and development activities.
Development of Aloe Vera-Based Desulfurization Method to Improve The Quality of Sumatra's Coal Hapsauqi, Iqbal; Desfitri , Erda Rahmilaila; Hanum, Farrah Fadhillah; Setyawan, Martomo
JURNAL SAINS NATURAL Vol. 14 No. 2 (2024): Sains Natural
Publisher : Universitas Nusa Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31938/jsn.v14i2.699

Abstract

Coal is Indonesia's primary energy source, contributing approximately 65.5% to the total electricity production in 2021. The high sulfur gas emissions during the coal combustion have negatively impacted air quality and the surrounding ecosystem. Consequently, researchers have conducted numerous studies on reducing sulfur content in coal. This study specifically explores the impact of adding Aloe vera extract in desulfurization. Aloe vera contains saponin, a surfactant-like compound that can alter the surface properties of minerals in coal, making sulfur particles easier to eliminate. In the experiment, aloe vera extract was applied to coal with variations of 100, 200, and 300 mL. The mixture was stirred using a magnetic stirrer at 100 rpm for one hour. Subsequently, the coal was separated and analyzed for sulfur content, calorific value, and ash content. The research results indicated that adding Aloe vera extract significantly reduces sulfur content in coal, simultaneously improving the overall quality of the coal with a sulfur reduction ranging from 7% to 22%. Moreover, the process reduced the ash content in the coal. By harnessing the potential of Aloe vera as a natural desulfurizing agent, this study presents an innovative and environmentally friendly solution to mitigate hazardous gas emissions during coal combustion.
Desulfurisasi Batubara Dengan Metode Leaching Menggunakan Gel Lidah Buaya Wahyuni, Alfia; Tanjung, Diva Amanda; Hapsauqi, Iqbal; Desmiarti, Reni; Desfitri, Erda Rahmilaila
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.136

Abstract

Coal is still the world's main energy source, widely used in power generation, steel production materials, cement industry, alumina processing plant paper factories and other chemical industries. Burning coal with high sulfur content produces sulfur dioxide gas (SO2), which can directly or indirectly disrupt the environment and contribute to air pollution and the formation of acid rain. Therefore, desulfurization has become an interesting research topic to improve coal quality. In this research, coal desulfurization is carried out using aloe vera gel as a solvent. 300 ml of aloe vera gel was contacted with 50 grams of coal using a magnetic stirrer with varying stirring speeds of 500 and 750 rpm, for duration 2, 3, 5 and 7 hours. Then, separated, dried, and analyzed for sulfur content, ash content, and calorific value. The results showed that the sulfur content decreased by 19.11% to 24.61%, the ash content decreased by 8.51% to 12.56%, and the calorific value was obtained respectively 6439cal/g, 6381 cal/g, 6433 cal/g, and 6467 cal/g.
Co-Authors Desfitri , Erda Rahmilaila Desfitri, Erda Rahmilaila Hanum, Farrah Fadhillah Hanum, Farrah Hanum Martomo Setyawan Nirmalasari, Jiran Rahayu, Aster Reni Desmiarti Siti Jamilatun Tanjung, Diva Amanda Wahyuni, Alfia