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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Indonesian Journal of Chemistry JKPK (Jurnal Kimia dan Pendidikan Kimia) J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Equilibrium Journal of Chemical Engineering
Cornelius Satria Yudha
Program Studi D3 Teknik Kimia, Sekolah Vokasi, Universitas Sebelas Maret
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Energy Engineering Materials Science & Nanotechnology

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Journal : Equilibrium Journal of Chemical Engineering

 1 
Application of Biogas Production Technology from Various Feedstocks on Small-Medium-Micro Enterprises: A Case Study Ari Diana Susanti; Cornelius Satria Yudha; Leader Firstandika; Paryanto Paryanto; Wusana Agung Wibowo
Equilibrium Journal of Chemical Engineering Vol 2, No 2 (2018): Volume 2 No 2 July 2018
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v2i2.40433

Abstract

Biogas production process is an alternative method to reduce dependency on non-renewable fossil-based energy consumption and also can reduce greenhouse gases production both domestically and industrially. The existing biogas technology is suitable to be adapted in small-micro-medium enterprises and domestics, specifically for those who raise cattle. The case study was performed by observation of biogas production with various wastes as feed, namely cow dung, quail manure, and wastewater of tofu production. The study conducted via direct interviews with stake holders and visitations to the instalations. Based on our observation, biogas production from cow dung exhibits the shortest retention time compared to the others, aside from the value of C/N ratio of the biogas feedstocks. The presence of biogas production installations are significantly reducing the energy supplies among the users. Beside as biogas product, the instalations also produce solid and liquid fertilizers as by-products and have relatively high economic value. Socio – engineering problems based on the application of biodigester are also studied.
Sintesis dan Analisis Struktur Prekursor NMC811 dari Mix Hydroxide Precipitate (MHP) dengan Presipitan Asam Oksalat Miftakhul Hakam; Adhitya Dharmawan; Meidiana Arinawati; Agus Purwanto; Cornelius Satria Yudha
Equilibrium Journal of Chemical Engineering Vol 5, No 2 (2021): : Volume 5 No 2 December 2021
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v5i2.58478

Abstract

ABSTRAK. Studi mengenai struktur kristal suatu material sangat penting dalam mengetahui baik tidaknya material, terutama untuk aplikasi teknologi penyimpanan energi listrik seperti baterai ion litium. Semakin murni dan baik suatu struktur kristal material, maka semakin baik efisiensinya dalam menjadi bahan baku material katoda baterai. Tujuan dari penelitian ini adalah sintesis dan analisis karakteristik struktur kristal prekursor NMC811 oksalat (Ni0,8Mn0,1Co0,1C2O4) dari senyawa Mixed hydroxide precipitate atau MHP dengan presipitan asam oksalat. Sintesis prekursor NMC811 dilakukan dengan mereaksikan MHP (Ni 51,43% wt) dengan asam asetat agar diperoleh larutan nikel asetat. Sejumlah garam kobalt dan mangan ditambahkan kedalam larutan sehingga komposisi nikel:kobalt:mangan senilai 8:1:1. Endapan prekursor diperoleh dengan penambahan presipitan larutan asam oksalat. Endapan prekursor yang berhasil diisolasi dianalisis dengan X-ray diffractometer (XRD) untuk evaluasi struktur kristalnya. Berdasarkan analisis XRD MHP memiliki puncak difraksi yang kurang tajam dengan lebar pita yang relative besar sehingga menandakan bahwa MHP memiliki sifat kristal yang buruk. Sementara itu, Prekursor NMC811 oksalat memiliki puncak difraksi yang tajam. Hal ini membuktikan prekursor memiliki sifat kristal yang baik dengan kemurnian yang tinggi. Oleh karena itu, Prekursor NMC811 oksalat dengan bahan baku MHP dapat digunakan untuk bahan baku material katoda baterai ion litium tipe NMC811. ABSTRACT. The study of the crystal structure of a material is very important in knowing whether or not the material is good, especially for the application of electrical energy storage technology such as lithium ion batteries. The purer and better the crystal structure of a material, the better its efficiency in becoming a battery cathode raw material. The purpose of this study was to synthesize and analyze the characteristics of the crystal structure of the precursor NMC811 oxalate (Ni0,8Mn0,1Co0,1C2O4) from Mixed hydroxide precipitate or MHP with oxalic acid as a precipitate. NMC811 precursor was synthesized by reacting MHP (Ni 51.43% wt) with acetic acid to obtain a nickel acetate solution. A number of cobalt and manganese salts are added to the solution so that the nickel:cobalt:manganese composition is 8:1:1. The precursor precipitate was obtained by adding oxalic acid solution as a precipitate. The isolated precursor precipitate was analyzed by X-ray diffractometer (XRD) to evaluate its crystal structure. Based on XRD analysis, MHP has a diffraction peak that is less sharp with a relatively large bandwidth, indicating that MHP has poor crystalline properties. Meanwhile, NMC811 oxalate precursor has a sharp diffraction peak. This proves the precursor has good crystalline properties with high purity. Therefore, the NMC811 oxalate precursor with MHP raw material can be used as the cathode material for the lithium ion battery type NMC811.
Analisis Morfologi Prekursor NMC811 dari Mix Hydroxide Precipitate (MHP) dengan Presipitan Asam Oksalat Adhitya Dharmawan; Miftakhul Hakam; Meidiana Arinawati; Cornelius Satria Yudha; Agus Purwanto
Equilibrium Journal of Chemical Engineering Vol 5, No 2 (2021): : Volume 5 No 2 December 2021
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v5i2.58474

Abstract

ABSTRAK. Morfologi material merupakan salah satu aspek yang berpengaruh pada kualitas material katoda baterai Li-ion atau LIBs, salah satunya material katoda LiNi0,8Mn0,1Co0,1O2 atau NMC811. Semakin baik distribusi ukuran dan butiran partikel, maka semakin baik pula kualitas dari produk akhir NMC811. Penelitian ini bertujuan untuk sintesis dan analisis prekursor NMC811 (Ni0,8Mn0,1Co0,1C2O4) dengan mixed hydroxide precipitate atau MHP sebagai sumber Ni. Pada penelitian ini, prekursor NMC811 oksalat diperoleh dengan melarutkan MHP, CoSO4 dan MnSO4 pada larutan asam asetat. Larutan yang terbentuk dipresipitasi dengan asam oksalat sehingga membentuk endapan prekursor NMC811 oksalat. Instrumen pengujian SEM-EDX digunakan dalam mengevaluasi karakteristik morfologi sampel. Studi komparasi morfologi prekursor NMC811 dengan MHP juga dilakukan. prekursor Berdasarkan analisis komposisional menggunakan EDX, komposisi atom C, O, Mn, Co dan Ni secara berturut-turut 15,21±0.55%; 57,64±1.37%; 4,47±0.59%; 4,20±0.74%; dan18,48±1.71%. Sementara itu, analisis menggunakan SEM menunjukkan bahwa prekursor NMC811 memiliki bentuk dan ukuran partikel yang cenderung seragam dan lebih kompak dibandingkan MHP yang memiliki bentuk dan ukuran yang lebih bervariasi. Sintesis awal NMC811 dengan presipitan asam oksalat dapat meningkatkan keseragaman morfologi yang baik, sehingga nantinya dapat dihasilkan produk akhir NMC811 yang baik pula.  ABSTRACT. Material morphology is one aspect that affects the quality of the cathode material for Li-ion batteries or LIBs, one of which is LiNi0,8Mn0,1Co0,1O2 or NMC811 cathode materials. The better the particle size and grain distribution, the better the quality of the final NMC811 product. This study aimed to synthesize and analyze the precursor of NMC811 (Ni0,8Mn0,1Co0,1C2O4) with mixed hydroxide precipitate or MHP as the source of Ni. In this study, NMC811 oxalate precursor was obtained by dissolving MHP, CoSO4 and MnSO4 in acetic acid or lactic acid solution. The solution formed was precipitated with oxalic acid to form a precursor precipitate of NMC811 oxalate. The SEM-EDX test instrument was used to evaluate the morphological characteristics of the samples. A comparative study of the morphology of the NMC811 precursor with MHP was also carried out. precursors Based on the compositional analysis using EDX, the atomic compositions of C, O, Mn, Co and Ni were 15.21±0.55%, respectively; 57.64±1.37%; 4.47±0.59%; 4.20±0.74%; and 18.48±1.71%. Meanwhile, analysis using SEM showed that the NMC811 precursor had a particle shape and size that tended to be uniform and more compact than MHP which had a more varied shape and size. The initial synthesis of NMC811 with oxalic acid precipitant can improve the good morphological uniformity, so that later, a good final product of NMC811 can be produced.
Meningkatkan Potensi Kewirausahaan dan Inovasi Produk di SMK N 1 Mojosongo Himmah Sekar Eka Ayu Gustiana; Ayub Mahmudi; Syahrul Aji Jayani; Cornelius Satria Yudha; Esa Nur Shohih; Firman Asto Putro; Muhammad Iqbal Al Fuady; Paryanto Paryanto; Windhu Griyasti Suci
Equilibrium Journal of Chemical Engineering Vol 6, No 2 (2022): Volume 6, No 2 December 2022
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v6i2.65939

Abstract

ABSTRAK. Kewirausahaan merupakan salah satu tuntutan kompetensi lulusan siswa di SMK Negeri 1 Mojosongo. Kompetensi tersebut menjadi salah satu indikator kualitas sumber daya manusia lulusan SMK. Tim Manajemen sekolah selalu berusaha meningkatkan kualitas sumber daya siswa dan tenaga pengajarnya. Salah satu terobosan yang dilakukan adalah bekerjasama dengan Prodi D3 Teknik Kimia Universitas Sebelas Maret untuk meningkatkan wawasan siswanya. Konsep kerjasama ini berupa transfer keilmuan yang dikemas dalam kegiatan pengabdian masyarakat. Kegiatan ini memiliki beberapa tahapan dimulai dari identifikasi masalah mitra yaitu perlunya pemahaman konsep kewirausahaan, business plan, pemodalan dana hibah, konsep desain dan inovasi produk dan pemasaran usaha. Pada tahap awal kegiatan siswa diminta mengikuti pretest untuk mengetahui tingkat mula pemahaman.  Tahap kedua paparan materi kewirausahaan dan diskusi, tahap ketiga demo sekaligus praktik langsung pembuatan inovasi produk pangan dari buah nipah. Kegiatan diakhiri dengan post test dan testimoni hasil kegiatan. Dari kegiatan yang telah dilakukan, menunjukkan hasil bahwa terdapat peningkatan pemahaman peserta tentang kewirausahaan dan inovasi produk menggunakan teknologi sederhana. Kata kunci: Kewirausahaan, inovasi pangan, nipah, sirupABSTRACT. Entrepreneurship is one of the required competencies for students' graduation at SMK Negeri 1 Mojosongo. Thus, this competency is one of the indicators to determine the quality of graduates from SMK N 1 Mojosongo. The School management has been trying to improve the quality of students and teaching staff. Collaboration between SMK N 1 Mojosongo and Diploma 3 of the Chemical Engineering Study Program of Universitas Sebelas Maret is one of the breakthroughs to increase students' insight. The concept of this collaboration is in the form of knowledge transfer which is packaged in community service activities. This activity begins with identifying the problems experienced by partners such as the need to understand the concept of entrepreneurship, business plans, grant funding, design concepts, product innovation, and business marketing. Before the main agenda begins, students are asked to take a pretest to determine their initial level of understanding. After a presentation on entrepreneurship, the students practice making food product innovations from Nypa fruticans. Finally, the students took the post-test and gave testimonials on the results of the activities. The results of this activity indicate that there is an increase in participants' understanding of entrepreneurship and product innovation with simple technology.Keywords: Food innovation, nypa fruticans, entrepreneurship, syrup
Calcination of Various Eggshell Wastes into CaO Heterogeneous Catalysts Dona Kurniawati Dewi; Vira Mawardha Putri; Vita Febriyanti; Cornelius Satria Yudha
Equilibrium Journal of Chemical Engineering Vol 7, No 1 (2023): Volume 7, No 1 July 2023
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i1.74484

Abstract

Abstract. The high food industry waste can cause pollution including a pungent odor and the emergence of bacteria that cause disease. Egg shells are confectionery waste that is commonly found in household waste and the food industry. The accumulation of eggshell waste can cause various diseases such as abdominal pain, diarrhea, fever, and cramps in the stomach caused by Salmonella bacteria. Thus, further processing of egg shells is required. In this study, eggshell waste was processed into heterogeneous catalysts of CaO. This heterogeneous CaO catalyst has the potential to be used as a catalyst in the manufacture of biodiesel. In this process, egg shells are processed by the calcination method. The variables used are shell type and calcination temperature. The shell variables used were chicken egg shells, duck egg shells, and quail egg shells. While the temperature variables used are at temperatures of 600 ºC and 800 ºC. To determine the quality of heterogeneous CaO catalyst, characteristic tests were varied out in the form of SEM-EDX and FTIR. From the analysis, the most effective results were in the form of chicken eggshell variables at a calcination temperature of 800 ºC.Keywords:Calcination, CaO, Catalyst, Shell, Waste
Regeneration of Spent Nickel Catalyst via Hydrometallurgical Method Fransisca Poppy Amelia; Erica Puspita Sari; Hafiz Norman; Muhammad Alhadilansa Salsabil; Cornelius Satria Yudha
Equilibrium Journal of Chemical Engineering Vol 7, No 2 (2023): Volume 7, No 2 December 2023-- Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i2.74492

Abstract

Abstract. Nickel Catalyst is one of the common catalysts found in chemical industries. However, this catalyst has a limited lifetime indicated by having performance or activity drop so it is potentially become dangerous waste if the handling is not proper. The spent nickel catalyst needs to be processed to recover and avoid pollution towards the environment. The Hydrometallurgy method is a proper method to process nickel catalyst waste. The purpose of this research is to investigate the characteristic of a regenerated nickel catalyst when it is treated with HCl and H2SO4 as the lixiviant. In this research, the spent nickel catalyst was treated with HCl and H2SO4 in the presence of 2% H2O2 reductant under room conditions and mixing rate at 200 rpm for 30 minutes of reaction. The leaching filtrate was precipitated using NaOH solution while the formed precipitate was heated at 800 °C for 3 hours. The regenerated catalyst was characterized using FTIR and SEM-EDX. The SEM images showed regenerated catalyst prepared using the HCl solution has a different morphology compared to the one using the H2SO4 solution. Based on FTIR analysis, both samples exhibit Ni-O and C-O groups. Based on elemental analysis, the highest nickel concentration was obtained by using HCl with a Ni content of 25.98%w/w, compare to sulfuric acid (H2SO4) with a Ni content of 10.94%w/w. The Ni content can be improved by the addition of a washing step after the sintering process.Keywords:Hydrometallurgy Nickel Catalyst, Waste, Leaching, Sintering
The Conversion of Sorghum (Sorghum bicolor (L.) Moench) Stem Waste into Activated Carbon by the Pyrolysis Method Using ZnCl2 Activator Natasya Dian Andini; Yuliana Prasetiyani; Fisafillah Al Mumtahinah; Cornelius Satria Yudha; Bintari Astika
Equilibrium Journal of Chemical Engineering Vol 7, No 2 (2023): Volume 7, No 2 December 2023-- Online First
Publisher : Program studi Teknik Kimia UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/equilibrium.v7i2.74478

Abstract

Abstract. The use of activated carbon in Indonesia is expanding along with the increasing demand for activated carbon. Therefore, it is necessary to continue to search for raw materials and methods for producing activated carbon to produce high-quality activated carbon. Sorghum stalk (Sorghum bicolor (L.) Moench) is used as a new precursor for the formation of activated carbon by utilizing a ZnCl2 activator followed by pyrolysis in a furnace with a temperature of 800°C. This study aims to determine the effect of drying and the concentration of activator agents on activated carbon production. The ZnCl2 activator concentrations used were 15% and 30%. The results showed that the activated carbon obtained through the withdrawal process with a ZnCl2 concentration of 30% had the highest carbon content, namely 100%. Test results with FTIR spectroscopy showed that the activated carbon samples had groups (C-H), (O-H), (C≡C), (C=O), (C=C), and (C-O). In addition, the SEM test results showed that the surface of the activated carbon formed had many pores. With the presence of activated carbon from sorghum stem waste, it is hoped that this product can reduce the contaminants contained in wastewater.Keywords: Activation, Activated Carbon, Waste, Pyrolysis, Sorghum, ZnCl2
Co-Authors Adhitya Dharmawan Adrian Nur Agus Purwanto Agus Purwanto Al Fuady, Muhammad Iqbal Anisa Raditya Nurohmah Ari Diana Susanti Asto Putro, Firman Atika Aulia Novita Sari Aulina Rohmah, Binti Ayub Mahmudi Bintari Astika Diajeng Putri Suciutami Dona Kurniawati Dewi Endah Retno Dyartanti Enni Apriliyani Erica Puspita Sari Esa Nur Shohih Firman Asto Putro Firstandika, Leader Fisafillah Al Mumtahinah Fransisca Poppy Amelia Griyasti Suci, Windhu Hafiz Norman Hanida Nilasary Hartoto Nursukatmo Hendri Widiyandari Himmah Sekar Eka Ayu Gustiana Inayati Inayati Linggar Tungga Gupita Luthfi Mufidatul Hasanah Luthfi Mufidatul Hasanah Luthfi Mufidatul Hasanah Meidiana Arinawati Miftakhul Hakam Muhammad Alhadilansa Salsabil Muhammad Iqbal Al Fuady Natasya Dian Andini Nur Shohih, Esa Paryanto Paryanto Paryanto Paryanto Purwanto, Agus Salma Khansani , Afanindya Shofirul Sholikhatun Nisa Soraya Ulfa Muzayanha Soraya Ulfa Muzayanha Soraya Ulfa Muzayanha Syahrul Aji Jayani Tika Paramitha Vira Mawardha Putri Vita Febriyanti Windhu Griyasti Suci Windhu Griyasti Suci Wusana Agung Wibowo, Wusana Agung Yuliana Prasetiyani