Garuda - Garba Rujukan Digital

Catalytic Pyrolysis of Corn Cob Using Fe-Ni/Char Catalyst Safitri, Mutia; Azis, Muhammad Mufti; Wintoko, Joko; Kristanto, Jonas; Caroko, Novi
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

There is a growing interest to convert biomass waste such as corn cob to biofuel. Thermal conversion such as pyrolisis may play an important role to produce bio-oil. The objective of this research was to develop a kinetic study of catalytic pyrolysis of corn cob over Fe-Ni/Char catalyst using Thermogravimetric Analysis (TGA). The solid catalyst was prepared by impregnation method. The ratio of the percentages of Fe and Ni metals in the X-Ray Fluorescence (XRF) analysis of the catalyst was close to 1:1, resulting in metal loading values of 2.5% (1.062% and 1.013%), 5% (2.291% and 2.794%), and 10% (4.947% and 5.417%) for the catalyst. The pyrolysis experiments were performed using various catalyst loadings of 0, 2.5, 5, and 10%. In addition, the present study also investigated the influence of heating rates of 5, 10, and 20 K min-1. Two isoconversion models, Kissinger-Akahira-Sunose (KAS) and Ozawa-Flynn-Wall (OFW) were utilized to determine the activation energies. The activation energies calculated using the KAS and OFW models revealed a consistent trend, with values of activation energy of corn cob pyrolysis around 124 - 303 kJ/mol and 133 - 313 kJ/mol, respectively.

Investigasi Kapasitas Energi Termal pada Solar Water Heater Berbasis Kalor Laten dengan Variasi Debit Air Nadjib, Muhammad; Caroko, Novi; Thoharudin, Thoharudin; Darmawan, Hanifan
Semesta Teknika Vol 26, No 1 (2023): MEI
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v26i1.18196

Material penyimpan kalor pada solar water heater adalah air sebagai kalor sensibel. Kekurangan air adalah densitas energinya rendah. Material lain adalah dari golongan kalor laten (phase change material, PCM) yang memiliki densitas energi tinggi. Unjuk kerja termal SWH tipe aktif dengan tangki horizontal dan memakai PCM jenis paraffin wax terhadap perubahan debit aliran air belum pernah diungkap. Tujuan penelitian ini adalah untuk mendapatkan karakteristik pengaruh perubahan debit air terhadap kapasitas penyimpanan energi termal di tangki. Penelitian menggunakan SWH dengan tangki yang di dalamnya diletakkan kapsul silinder berisi paraffin wax RT55. Termokopel dipasang di sisi air dan PCM. Eksperimen dilakukan secara indoor memakai solar simulator. Debit aliran air yang digunakan adalah 1 lpm, 2 lpm dan 3 lpm. Penelitian ini mendapatkan hasil yaitu kapasitas energi termal untuk debit aliran tersebut masing-masing adalah 10,45 MJ, 10,59 MJ dan 10,71 MJ. Semakin besar debit air maka kapasitas penyimpanan energi termal semakin tinggi.

Pengaruh Densitas dan Viskositas terhadap Sudut Injeksi Biodiesel Jatropha-Jagung (1:4 dan 4:1) Wahyudi, Wahyudi; Caroko, Novi; Sampurna, Hanif Budi
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 2 (2023): Desember
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i2.20072

Biodiesel has attracted attention as an alternative fuel in efforts to reduce emissions and dependence on fossil fuels. Among various potential sources for biodiesel production, jatropha and corn oil have stood out due to their availability and high yield potential. However, each has unique characteristics that affect their performance as fuels. Jatropha oil has relatively high viscosity, while corn oil is generally used as a food ingredient. This study aimed to explore the potential of combining jatropha and corn biodiesel in different proportions and its impact on fuel characteristics and diesel engine spray injection. Both types of oil were processed into biodiesel through esterification and transesterification processes. Subsequently, biodiesel mixtures were created in ratios of 1:4 and 4:1. Each mixture was then varied with diesel to produce B5, B10, B15, B20, B25, B30, B35, and B40. Each sample was tested for its physical properties such as density and viscosity, and injection spray angle. The results of this study indicated that the density and viscosity values of the 1:4 jatropha-corn biodiesel mixture were lower than those of the 4:1 jatropha-corn biodiesel mixture. There was a significant relationship between viscosity and density with the injection angle. The higher the density and viscosity, the narrower the injection angle.

Pemberdayaan Kelompok Tani Bangkit melalui Pembuatan Sabun Serai Wangi dan Label Kemasan Produk Caroko, Novi; Surono, Untoro Budi; Zaki, Ahmad
Berdikari: Jurnal Inovasi dan Penerapan Ipteks Vol. 13 No. 1: February 2025
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/berdikari.v13i1.24337

Essential oils are one of the vegetable oils that have many benefits. Kelompok Tani Bangkit is one of the Micro, Small, and Medium Enterprises (MSMEs) engaged in producing essential oils made from citronella plants. The production of derivative products in herbal bath soap offers a broader marketing opportunity than pure citronella oil. The purpose of this community service is to improve the understanding of the members of the Kelompok Tani Bangkit regarding the process of making herbal bath soap and product packaging labels. The implementation of this community service used the Participatory Rural Appraisal (PRA) method, which directly involved the community in every activity. The results of the community service showed that the knowledge of the members of the Kelompok Tani Bangkit regarding the making of herbal bath soap and product packaging labels increased by 73% and 72%, respectively

Pelatihan Sistem Keuangan Desa Untuk Desa Mitra UMY Caroko, Novi; Wahyono, Tri
Prosiding Seminar Nasional Program Pengabdian Masyarakat Vol. 5: 2: December 2022
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/ppm.58.1388

Desa memiliki peran penting dalam pembangunan nasional. Berdasarkan Undang-Undang Nomor 6 Tahun 2014, desa melaksanakan pembangunan untuk kesejahteraan masyarakat. Pemerintah desa diharapkan dapat lebih mandiri dalam menjalankan tata kelola pemerintahan yang baik, mengelola seluruh potensi yang ada di desa, baik sumber daya alam yang dimiliki maupun pengelolaan keuangan dan aset desa. Manajemen Sumber Daya Manusia (SDM) yang efektif memiliki kaitan langsung dengan keberhasilan upaya peningkatan kinerja pegawai, baik pada tingkat individu, kelompok kerja, maupun tingkat organisasi. Pemerintah dengan kemampuan administrasi yang lemah biasanya mengalami kendala dalam pengelolaan keuangan mereka. Kualitas sumber daya manusia aparatur desa dalam mewujudkan Undang-Undang Nomor 6 Tahun 2014 perlu ditingkatkan. Program pengabdian ini bertujuan untuk memberikan pendampingan dan pelatihan kepada desa mitra Universitas Muhammadiyah Yogyakarta guna meningkatkan kualitas sumber daya manusia aparatur desa di bidang sistem administrasi dan keuangan desa. Metode pelaksanaan program pengabdian ini berupa pendampingan kepada aparatur desa mitra dengan tahapan persiapan, perizinan, survei dan observasi, sosialisasi kegiatan, kemudian dilanjutkan dengan pendampingan dalam bentuk edukasi, pelatihan, dan pengukuran hasil. Kegiatan pelatihan dilaksanakan dalam tiga pertemuan yang bertempat di 1912 Café dan Ruang Sidang lantai 1 Gedung D, Universitas Muhammadiyah Yogyakarta. Materi pelatihan mencakup komunikasi pelayanan publik, kepemimpinan, serta sistem keuangan desa berbasis teknologi informasi.

Inisiasi Pembibitan Kentang (Hortikultura) Caroko, Novi; Mulyono , Mulyono
Prosiding Seminar Nasional Program Pengabdian Masyarakat Vol. 5: 2: December 2022
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Usaha Mikro, Kecil, dan Menengah (UMKM) dengan kepemilikan perseorangan atau badan usaha menjadi salah satu peluang peningkatan lapangan kerja, sehingga dapat menurunkan angka kemiskinan. Jumlah pelaku UMKM sebanyak 64,2 juta atau 99,99% dari jumlah pelaku usaha di Indonesia. UMKM tersebut didominasi oleh pelaku usaha mikro yang berjumlah 98,68% dengan daya serap tenaga kerja sekitar 89%. Salah satu UMKM yang ada di Desa Condongcampur yaitu Komunitas Gabungan Kelompok Tani (Gapoktan). Permasalahan yang timbul saat ini yaitu kurangnya pemahaman para anggota Komunitas Gabungan Kelompok Tani (Gapoktan) mengenai media tanam dan metode pembibitan tanaman kentang. Tujuan dari program ini adalah untuk meningkatkan pemahaman bagi anggota Gapoktan tentang media tanam dan metode pembibitan tanaman kentang. Metode pelaksanaan program ini berupa pendampingan kepada komunitas Gapoktan, yaitu dengan melakukan persiapan, perizinan, sosialisasi kegiatan, survei, observasi, pendampingan (edukasi, pelatihan, dan pengukuran hasil), monitoring, evaluasi, pelaporan, dan publikasi. Pengabdian masyarakat di Desa Condongcampur telah dilaksanakan dengan sukses. Pemahaman anggota Gapoktan terkait teknik pembibitan dan pengelolaan media tanam meningkat. Hasil evaluasi menunjukkan semua peserta puas serta menginginkan adanya pelatihan dan pendampingan lebih lanjut. Pelatihan dan pendampingan tidak hanya pada proses pembibitan, tetapi juga mencakup pengelolaan hama penyakit, anlaisis usaha tani, dan pengolahan hasil panen tanaman kentang.

Analysis of nitrogen adsorption capability at various activation temperatures of Klaten natural zeolite Caroko, Novi; Sukamta, Sukamta
Jurnal Polimesin Vol 22, No 3 (2024): June
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i3.4882

The Pressure Swing Adsorption (PSA) method operates by passing air through an adsorbent to produce concentrated oxygen gas. Zeolites are commonly utilized as adsorbents due to their ability to adsorb nitrogen from the surrounding air. Two types of zeolites commonly employed are natural and synthetic zeolites. While the utilization of natural zeolites as adsorbents in oxygen purification remains limited, their potential as an alternative adsorbent is worth exploring in this field. This study focused on developing physically activated Klaten natural zeolite as an adsorbent to enhance oxygen purity. Physical activation involved heating for 1.5 hours using an electric oven at four temperature variations (250ºC, 300ºC, 350ºC, and 400ºC). Additionally, four distinct flow rates were tested: 0.1; 0.5; 1.0; and 1.5 lpm. Oxygen purification testing revealed that higher activation temperatures led to greater increases in oxygen concentration. The highest increase of 2.45% was achieved at an activation temperature of 400ºC, while the lowest increase of 1.75% was observed at 250ºC with a flow rate of 0.1 lpm. With a 10-minute holding period, oxygen content during the adsorption process ranged from 1.35% to 2.45%, compared to 0.60%-0.75% without holding. Physical activation of zeolite from Klaten enhanced its nitrogen absorption capacity, indicating the potential of natural zeolite from Klaten for oxygen purification through optimized activation processes, possibly via chemical activation

Catalytic Pyrolysis of Corn Cob Using Fe-Ni/Char Catalyst Safitri, Mutia; Azis, Muhammad Mufti; Wintoko, Joko; Kristanto, Jonas; Caroko, Novi
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

Show Abstract | Download Original | Original Source | Check in Google Scholar

There is a growing interest to convert biomass waste such as corn cob to biofuel. Thermal conversion such as pyrolisis may play an important role to produce bio-oil. The objective of this research was to develop a kinetic study of catalytic pyrolysis of corn cob over Fe-Ni/Char catalyst using Thermogravimetric Analysis (TGA). The solid catalyst was prepared by impregnation method. The ratio of the percentages of Fe and Ni metals in the X-Ray Fluorescence (XRF) analysis of the catalyst was close to 1:1, resulting in metal loading values of 2.5% (1.062% and 1.013%), 5% (2.291% and 2.794%), and 10% (4.947% and 5.417%) for the catalyst. The pyrolysis experiments were performed using various catalyst loadings of 0, 2.5, 5, and 10%. In addition, the present study also investigated the influence of heating rates of 5, 10, and 20 K min-1. Two isoconversion models, Kissinger-Akahira-Sunose (KAS) and Ozawa-Flynn-Wall (OFW) were utilized to determine the activation energies. The activation energies calculated using the KAS and OFW models revealed a consistent trend, with values of activation energy of corn cob pyrolysis around 124 - 303 kJ/mol and 133 - 313 kJ/mol, respectively.

Title

Found 18 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 18 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 18 Documents
Search