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All Journal AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT SPIN: Jurnal Kimia & Pendidikan Kimia JTTM: Jurnal Terapan Teknik Mesin
Putri Rizky
Akademi Teknik Indonesia Cut Meutia
Aerospace Engineering Chemistry Control & Systems Engineering Education Engineering Mechanical Engineering

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The influence of catalyst on the characteristics of biodiesel from waste cooking oil Muhammad Idris; Tony Siagian; Dedy Sofyanto; Putri Rizky; Friska Heriyanti; Derlini; Imam Azhari; Zakir Husin
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.676

Abstract

The aim of this research was to investigate the influence of catalyst on the flash point, viscosity, density, and iodine value of biodiesel. The raw material used in biodiesel production was waste cooking oil. The transesterification process was employed by reacting the catalyst and methanol, followed by mixing them with the waste cooking oil simultaneously. The catalyst concentration variations used in this study were 0.25% and 0.5%. The resulting transesterification mixture was left to settle for approximately 10 minutes. The biodiesel and glycerol were separated after settling, and the biodiesel was washed with distilled water at a temperature of 50°C and then evaporated at 100°C. The flash point test results for catalyst concentrations of 0.25% and 0.5% were 58°C and 48.5°C, respectively. The viscosity test results for catalyst concentrations of 0.25% and 0.5% were 4.567 x 10-6 m2/s and 4.625 x 10-6 m2/s, respectively. The density test results for catalyst concentrations of 0.25% and 0.5% were 889 kg/m3 and 888.3 kg/m3, respectively. The iodine value test results for catalyst concentrations of 0.25% and 0.5% were 112.2 g I2/100g and 114 g I2/100g, respectively. Based on the test data, the flash point, viscosity, density, and iodine value were obtained. The test results indicated that the flash point values from both experiments did not meet the biodiesel quality standards. However, the viscosity and density test results from both experiments met the biodiesel quality standards and were suitable for use. Regarding the iodine value test, the characteristics of the biodiesel from both experiments did not fully meet the biodiesel standard, although the results obtained were not significantly different from the quality standards set by the Ministry of Energy and Mineral Resources
THE EFFECT OF ACIDIC AND ALKALINE CONDITIONS ON FREE FATTY ACID CONTENT DURING THE TRANSESTERIFICATION OF WASTE COOKING OIL Rismul Trianto Salawali; Resti Ayu Ningrum; Rika Silvany; Putri Rizky
SPIN JURNAL KIMIA & PENDIDIKAN KIMIA Vol. 8 No. 1 (2026): January - June 2026
Publisher : UIN Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/spin.v8i1.15425

Abstract

Waste cooking oil is a waste material with significant potential for utilization as a biodiesel feedstock; however, its high free fatty acid (FFA) content can reduce the efficiency of the transesterification process. This study aimed to investigate the effect of acidic and alkaline conditions on the presence of free fatty acids during the transesterification of waste cooking oil using sodium hydroxide (NaOH) and potassium hydroxide (KOH) catalysts. Prior to the transesterification process, the waste cooking oil was filtered and heated at 60°C for 30 minutes to reduce its moisture content. Transesterification was carried out using methanol at a methanol-to-oil molar ratio of 6:1 and a catalyst concentration of approximately 0.25% of the oil weight. The reaction pH was varied at 6, 7, 8, 9, and 10, while the reaction temperature was maintained at 60°C for 1 hour. FFA content was analyzed before and after transesterification using an acid-base titration method with 0.1 N NaOH solution. The results showed that the initial FFA content of the waste cooking oil was 5.20%. The use of the NaOH catalyst resulted in final FFA contents of 3.00%, 2.55%, 1.90%, 1.75%, and 2.20% at pH 6, 7, 8, 9, and 10, respectively, corresponding to FFA reductions of 42.3%, 51.0%, 63.5%, 66.3%, and 57.7%. Meanwhile, the KOH catalyst produced final FFA contents of 2.80%, 2.35%, 1.70%, 1.60%, and 2.05%, with FFA reductions of 46.2%, 54.8%, 67.3%, 69.2%, and 60.6%, respectively. The reduction in FFA content increased with increasing pH and reached its optimum condition at pH 9 for both catalysts. At pH 10, a decrease in FFA reduction efficiency was observed, which was likely attributed to the occurrence of side reactions such as saponification. Overall, the KOH catalyst demonstrated superior performance compared to NaOH in reducing FFA content under all tested pH conditions. These findings indicate that mildly alkaline to moderately alkaline conditions, particularly at pH 9, represent the optimum conditions for reducing FFA content during the transesterification of waste cooking oil.
Pentingnya Media Sosial Dalam pemasaran Usaha Kita Madu di Binjai Pratiwi Putri Lestari; Sukmawati Sukmawati; Dedi S. Simajuntak; Putri Rizky; Rika Silvany
Amaliah: Jurnal Pengabdian Kepada Masyarakat Vol 9 No 1 (2025): Amaliah Jurnal: Pengabdian kepada Masyarakat
Publisher : LPPI UMN AL WASHLIYAH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32696/ajpkm.v9i1.5036

Abstract

Kita Madu business in Binjai is a business that sells pure honey. This activity process aims to help Kita Madu's business in increasing honey sales. Honey sales are carried out not only by selling directly, but also using online sales, namely social media. By utilizing existing social media, you can promote and see consumer enthusiasm for the products being sold. In promoting products, business owners can create their own advertisements by making videos about how to consume honey and providing articles about the benefits of honey for the body. Sales using social media can assess customer satisfaction with testimonials sent by consumers. Based on the results of observations in a month using social media, sales of Kita Madu have increased, because we also have a large number of followers on social media, making it easier to promote Kita Madu.
Co-Authors Dedi S. Simajuntak Dedy Sofyanto Simanjuntak Derlini Friska Heriyanti Imam Azhari Muhammad Idris Pratiwi Putri Lestari Resti Ayu Ningrum Rika Silvany Rika Silvany Rismul Trianto Salawali Sukmawati Sukmawati Tony Siagian Zakir Husin