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All Journal Jurnal Chemurgy Jurnal Ilmiah Berkala: Sains dan Terapan Kimia
Tantra Diwa Larasati
Universitas Mulawarman
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Engineering Environmental Science

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KARBONISASI LIMBAH KELAPA SAWIT DENGAN PROSES HIDROTERMAL SEBAGAI BAHAN BAKU ELEKTRODA SUPERKAPASITOR Tantra Diwa Larasati; Tirto Prakoso; Jenny Rizkiana
Jurnal Chemurgy Vol 5, No 1 (2021): Jurnal Chemurgy-Juni 2021
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v5i1.5916

Abstract

Limbah kelapa sawit merupakan sumber biomassa yang melimpah di Indonesia. Ketersediaan biomassa kelapa sawit ini dapat dimanfaatkan sebagai bahan baku produk bernilai tambah tinggi. Salah satu produk yang dapat dihasilkan adalah karbon aktif. Karbon aktif merupakan material berpori dan memiliki konduktivitas yang baik, membuat karbon aktif cocok digunakan sebagai material elektroda superkapasitor. Karbon aktif dibuat melalui dua proses utama yaitu karbonisasi dan aktivasi. Proses karbonisasi yang dilakukan adalah karbonisasi hidrotermal dilanjutkan dengan aktivasi secara fisika. Penelitian ini difokuskan pada pembuatan karbon aktif berbasis limbah kelapa sawit dengan proses karbonisasi hidrotermal untuk bahan baku superkapasitor. Mesopore area dari karbon aktif terbentuk akibat penggunaan CaCl2 sebagai agen pengaktivasi selama proses hidrotermal. Karbon aktif yang dihasilkan dari tandan kosong kelapa sawit memiliki luas permukaan 375 – 723 m2/g dan ukuran pori 3,4 – 5,6 nm. Pada penelitian ini, karbon aktif digunakan sebagai elektroda kerja pada superkapasitor tipe hybrid simetrikal. Sel superkapasitor ini mampu menghasilkan kapasitansi sebesar 4,3015 F/g.
PREDICTION ANALYSIS OF FOULING MODEL ON HEAT EXCHANGER IN THE CRUDE OIL REFINERY Hairul Huda; Renanto Renanto; Totok Ruki Biyanto; Rif'an Fathoni; Tantra Diwa Larasati
Jurnal Chemurgy Vol 6, No 1 (2022): Jurnal Chemurgy-Juni 2022
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v6i1.7672

Abstract

Fouling mainly occurs in the oil industry. Fouling is an unwanted deposit in HE (heat exchanger). Reliable fouling models are scarce, although empirical and theoretical models have been proposed to describe fouling in heat exchangers. The general models of empirical fouling used are linear, falling rate, and asymptotic. The research methodology begins with the acquisition and use of operational fouling data, which is then followed by the use of an asymptotic fouling model and ends with calculating the thickness of fouling in all HE. The object of this research study is all HE in the crude oil refinery HEN (heat exchanger network). The aim of this research is to use the asymptotic fouling model and get the fouling thickness. The fouling resistance from time to time increases, but in the end, it tends to be stationary, where for the final value, the highest fouling resistance is in HE-10, namely 14.8E-03 (m2°C/W), and the lowest value is fouling resistance at HE- 01 is 1.27E-03 (m2°C/W). The thickness of HE fouling in asymptotic conditions indicates that HE undergoes the same deposition process as suppression.Keywords: fouling, heat exchanger, asymptotic, crude oil refinery, heat exchanger network
EFFECT OF VARIATIONS IN CONCENTRATION OF MORINGA LEAF EXTRACT ON EDIBLE FILM CHARACTERISTICS OF CASSAVA ONGGOK STARCH Aisyah Husnayanti Amini; Arbainah .; Tantra Diwa Larasati
Jurnal Chemurgy Vol 6, No 2 (2022): Jurnal Chemurgy-Desember 2022
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v6i2.9252

Abstract

Along with the awareness of the world's citizens about the importance of health and the quality of a packaged food product especially its durability, so that an environmentally friendly type of packaging known as edible film has been developed. One form of edible film that has the highest starch content composition is cassava onggok. In this study to make edible films using starch from cassava onggok waste, glycerol, chitosan, and Moringa (Moringa Oleifera) leaves. Cassava onggok waste has the highest carbohydrate content, which is around 65.90% which has the potential as the main ingredient in the manufacture of edible films. Moringa leaves contain phenolic compounds that will have a positive impact on improving edible products that have antioxidant abilities. The research method used is an experimental and analytical method. so it can be seen that increasing the concentration of Moringa leaves the lower the steam transmission rate while the air absorption is higher.
Characterization of Natural Face Toner from Rice-washed Water Tantra Diwa Larasati; Novy Pralisa Putri; Helda Niawanti; Linda Eka Pratiwi; Delthania Ekaristi Paulina Gedoan
Jurnal Sains dan Terapan Kimia Vol 16, No 2 (2022)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jstk.v16i2.10850

Abstract

Toner is a skin treatment that serves to refresh and clean facial skin. This study used rice-washed water as the main ingredient for producing toner. Rice-washed water is the main ingredient because it contains abundant nutrients such as carbohydrates in the form of starch, fat, protein, gluten, cellulose, hemicellulose, sugar, vitamins, and minerals. This study aims to determine the effect of toner application made from rice-washed water on the skin, storage time on toner quality, and the production process. The method used in this study uses a simple method of soaking with a rice/water with a various ratio (kg/L). The analysis results show that the toner has a pH of 6.4, considered safe for all skin types with good moisture. The effect on skin moisture was analyzed on six respondents. The toner has a viscosity that is not too thick with a cloudy white color caused by rice grains. Rice grains are beneficial for the skin because they can regenerate skin cells. Rice-washed water toner for seven days contains fat, manganese, protein, oil, fat, and is odorless.
Co-Authors Aisyah Husnayanti Amini Arbainah . Delthania Ekaristi Paulina Gedoan Fathoni, Rif'an Hairul Huda Helda Niawanti Jenny Rizkiana Linda Eka Pratiwi Novy Pralisa Putri Renanto Handogo Tirto Prakoso Totok Ruki Biyanto