Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

0.408

P-Index

This Author published in this journals

All Journal Jurnal Teknik ITS Jurnal Sains dan Seni ITS IPTEK The Journal for Technology and Science Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Journal of Petroleum and Geothermal Technology

Randy Yusuf Kurniawan

Prodi Rekayasa Minyak Dan Gas Institut Teknologi Sumatera

Author-ID : 865889

Arts Humanities Chemistry Computer Science & IT Earth & Planetary Sciences Education Energy Engineering

Published : 6 Documents Claim Missing Document

Claim Missing Document

Articles

Development of Activated Carbon Material from Oil Palm Empty Fruit Bunch for CO2 Adsorption Irsandi Dwi Oka Kurniawan; Randy Yusuf Kurniawan; Nurul Widiastuti; Lukman Atmaja; Anis Shofiyani
Jurnal Teknik ITS Vol 8, No 2 (2019)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

This study aims to determine the CO2 adsorption capacity of activated carbon doped with nitrogen. Activated carbon is carbonized from oil palm empty fruit bunches (OPEFB). The results of lignocellulose analysis from OPEFB, 42.87 wt% of hemicellulose, 27.31 wt% of lignin, 23.02 wt% of cellulose and 6.80 wt% of ash. Potassium hydroxide is used as an activating agent and urea as a nitrogen precursor with an OPEFB mass: urea is 1: 1 to 1: 5. The method used is single-step, where carbonization-activation-doping is made into one process. Activated activated carbon is characterized by Fourier-Transform Infrared (FTIR), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) isotherm, and scanning electron microscope (SEM) with energy dispersive X-ray. Infrared spectra showed that N-doped activated carbon was successfully synthesized. Diffractogram shows an amorphous structure with graphitic plane (002) and (100). ACN11 produces the highest surface area of 1309.47 m2 g-1. The results of gravimetric CO2 adsorption at 30 °C and 1 atm conditions resulted in the largest CO2 adsorption capacity of ACN14 at 15.02 wt%. The ACN11 and ACN14 adsorption kinetics models followed the intraparticle diffusion model with R2 values of 0.95 and 0.97.

Synthesis of TiO2/Zeolite-A Composite for The Removal of Methylene Blue on Direct Sunlight Yasokhi Fatkhasari; Nafiah Afuw Rouf; Wahida Annisa Ermadayanti; Randy Yusuf Kurniawan; Arseto Yekti Bagastyo
Jurnal Teknik ITS Vol 8, No 2 (2019)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Wastewater generated from textile industry contains azo dye, (e.g., methylene blue), which is inefficient to decompose by using biological processes, and requires long treatment time. TiO2 is the most widely used adsorbent for industrial applications and photocatalytic degradation of various azo dyes in textile wastewater. Its anatase is the most effective and widely used photocatalyst, however the wide band gap of TiO2 has limited its widespread application in industry since it needs to be excited by ultraviolet (UV) light. In order to overcome this issue, combination of adsorbent zeolite and TiO2 into the composite was used in this study so that TiO2 can adsorb methylene blue under direct sunlight. Composition of 1 g TiO2 and 1 g Zeolite composite was used in batch method to eliminate different methylene blue concentrations, i.e., 25; 50; 75; 100; 125; 150; 200; and 250 ppm by means of adsorption process under direct sunlight. The experimental result showed that addition of zeolite was able to considerably improve adsorption capacity of TiO2 on direct sunlight in the range of 97.2 – 99.3 % of methylene blue removal. The highest removal was observed in the case of lower concentrations of methylene blue, i.e., in the range of 25-50 ppm.

Sintesis Zeolit-A dari Abu Dasar Batubara dengan Pemisahan Fe dan Ca Randy Yusuf Kurniawan; Nurul Widiastuti
Jurnal Sains dan Seni ITS Vol 6, No 1 (2017)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Penelitian ini bertujuan untuk mensintesis zeolit-A dari abu dasar dengan pemisahan kandungan Fe dan Ca sebelum dilakukan peleburan. Zeolit-A disintesis menggunakan ekstrak yang dihasilkan melalui metode peleburan abu dasar pada suhu 750oC dalam atmosfer udara yang diikuti proses hidrotermal pada suhu 100°C selama 12 jam. Hasil menunjukkan bahwa kristalinitas zeolit-A dengan pemisahan Fe dan Ca sebesar 88,64% dengan tingkat kemurnian yang lebih besar, sementara pada zeolit-A tanpa pemisahan Fe dan Ca yang telah dilaporkan pada penelitian sebelumnya didapatkan kristalinitas sebesar 84,19% dengan tingkat kemurnian yang lebih rendah.

Synthesis N-Doped Activated Carbon from Sugarcane Bagasse for CO2 Adsorption Randy Yusuf Kurniawan; Irsandi Dwi Oka Kurniawan; Lukman Atmaja; Nurul Widiastuti
IPTEK The Journal for Technology and Science Vol 30, No 3 (2019)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v30i3.5469

Nitrogen-doped activated carbon (SBACN) was synthesized from sugarcane bagasse waste as acarbon source and urea as nitrogen source through potassium hydroxide (KOH) activation for 2 h at high temperature via two step methods. The synthesized SBCN was characterized using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Fourier Transform Infrared (FTIR). The results showed that the SBCN has low degree crystallinity and graphitization with highly developed micropores due to synergistik activation effect of KOH and urea. These characteristics provide an important contribution to carbon dioxide adsorption capacity, which can reach up to 11,20% wt and this value is higher than pristine activated carbon. The results indicating that the presence of this nitrogen functionalities is found to have a beneficial influence on the carbon dioxide adsorption characteristic in standart condition and exhibit considerable potential in solid adsorption.

SINTESIS NANOKOMPOSIT FE3O4/C DARI TANDAN KOSONG KELAPA SAWIT DAN POTENSINYA SEBAGAI ANODA BATERAI LITHIUM Randy Yusuf Kurniawan; Aulia Mutiara Hikmah; Dwi Miftha Kurnia; Stevy Canny Louhennapessy; Junanta Junanta; Ismail Haris Setiawan; Auliya Putri Hardiyani
Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia Vol 8, No 1 (2025)
Publisher : Universitas Islam Kalimantan MAB Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/dl.v8i1.18437

Tandan Kosong Kelapa Sawit (TKKS) merupakan limbah kelapa sawit yang dapat dikonversi menjadi material karbon bernilai tambah. Hasil konversi karbon disintesis dengan Fe3O4 menjadi nanokomposit yang memiliki potensi sebagai anoda baterai lithium. Penelitian ini bertujuan menentukan metode aktivasi karbon dari TKKS agar memiliki porositas optimal. Karbon yang terbentuk disintesis menjadi nanokomposit dan dikarakterisasi menggunakan XRD, FTIR, serta Adsorpsi-Desorpsi N2 (BET). Hasil sintesis nanokomposit dikarakterisasi dengan XRD dan BET. Hasil karakterisasi menunjukkan karbon dengan porositas terbesar diperoleh melalui aktivasi perendaman KOH (TKP) dengan luas permukaan 852 m²/g dan volume pori 0,64 m³/g. Nanokomposit disintesis dengan rentang variasi massa karbon (NFC-X) 0,25–1,5 g. Karakterisasi menunjukkan porositas terbesar pada NFC-1,25 dengan luas permukaan 1080 m²/g dan volume pori 0,89 m³/g tanpa merusak struktur nano Fe₃O₄, yang dibuktikan dengan tidak berubahnya puncak khas material Fe₃O₄.

A Design Analysis of Shell and Tube Type Recuperator in Organic Rankine Cycle Power Plant with Low-Temperature Geothermal Steam Source MUHAMMAD RIFQI DWI SEPTIAN; Fitri Rusmaladewi; Friska Hasugian; Rozi Afdi; Dwi Miftha Kurnia; Stevy Canny Louhenapessy; Randy Yusuf Kurniawan; Setiadi Wira Buana
Journal of Petroleum and Geothermal Technology Vol. 6 No. 1 (2025): May
Publisher : Universitas Pembangunan Nasional "Veteran" Yogyakarta

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

Organic Rankine Cycle (ORC) power generation systems offer an effective means to harness low-grade geothermal heat. A crucial component in improving ORC thermal performance is the recuperator, which recovers residual heat from the turbine outlet to preheat the working fluid. This study focuses on the design and evaluation of a shell and tube recuperator using R-600a as the working fluid, through thermodynamic and heat transfer analyses. Key parameters such as LMTD (32.38 °F), effectiveness (0.434), and heat transfer area (60.35 m²) were calculated. Pressure drops were within acceptable limits (tube side: 4.46 psi; shell side: 0.475 psi), and the dirt factor of 0.0038 indicates good resistance to fouling. The results support the feasibility of implementing the proposed design in small to medium-scale geothermal ORC applications. Keywords: geothermal; ORC; recuperator; shell and tube; thermal analysis

Co-Authors Aulia Mutiara Hikmah Auliya Putri Hardiyani Bagastyo, Arseto Yekti Dwi Miftha Kurnia Dwi Miftha Kurnia Fitri Rusmaladewi Friska Hasugian Irsandi Dwi Oka Kurniawan Irsandi Dwi Oka Kurniawan Ismail Haris Setiawan Junanta Junanta Lukman Atmaja MUHAMMAD RIFQI DWI SEPTIAN Nafiah Afuw Rouf Nurul - Widiastuti Rozi Afdi Setiadi Wira Buana Shofiyani, Anis Stevy Canny Louhenapessy Stevy Canny Louhennapessy Wahida Annisa Ermadayanti Yasokhi Fatkhasari

Title

Found 6 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 6 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 6 Documents
Search