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All Journal Jurnal Litbang Industri Jurnal Serambi Engineering Jurnal Teknik Kimia USU Jurnal Litbang Industri Jurnal Rekayasa Kimia & Lingkungan
Sofyana, Sofyana
Jurusan Teknik Kimia Fakultas Teknik Universitas Syiah Kuala Jln T. A. Rauf No. 7 Darussalam Banda Aceh
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Transesterifikasi minyak kemiri sunan menjadi biodiesel menggunakan katalis padat K2O/C Muhammad Zaki; Teku Muhammad Asnawi; Husni Husin; Saifullah Ramli; Sofyana Sofyana; Fikri Hasfita; Justaman Arifin Karo Karo
Jurnal Litbang Industri Vol 10, No 2 (2020)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v10i2.6143.83-88

Abstract

Preparasi katalis padat K2O/C telah berhasil disiapkan dengan mengimpregnasi K2CO3 pada permukaan karbon aktif sekam padi selama 6 jam. Campuran tersebut dikalsinasi pada suhu 300 oC selama 3 jam hingga terbentuk K2O/C. Tujuan penelitian ini adalah untuk menginvestigasi kinerja katalis K2O/C dalam proses  transesterifikasi minyak biji kemiri sunan menjadi biodiesel. Karbon sekam padi (C) dipersiapkan dengan proses pirolisis sekam padi, dilanjutkan dengan proses aktivasi untuk mendapatkan karbon sebagai penyangga berpori. Katalis K2O/C  dikarakterisasi dengan Scanning Electron Microscopy (SEM) dan Energy-Dispersive X-ray (EDX). Hasil analisa EDX menunjukkan bahwa komposisi katalis didominasi oleh karbon (C) dan kalium (K). Fasa aktif K2O terdistribusi pada permukaan karbon aktif secara merata. Katalis K2O/C yang dihasilkan digunakan dalam reaksi transesterifikasi minyak kemiri sunan menggunakan reaktor batch. Yield biodiesel tertinggi dicapai hingga 98,68% ketika menggunakan katalis 4%, loading K2CO3  pada karbon aktif 0,5% berat, waktu  reaksi 90 menit, serta rasio molar metanol terhadap minyak 8:1. Katalis K2O/C sangat berpotensi untuk dikembangkan selanjutnya sebagai salah satu katalis padat untuk mengkonversi minyak nabati menjadi biodiesel.
Ekstraksi Pektin dari Kulit Jeruk dan Kulit Pisang sebagai Biosorben pada Proses Adsorpsi Logam Berat Fe Widya Putri Rahayu; Indah Wulan Harisma; Yanna Syamsuddin; Sofyana Sofyana; Sri Mulyati
Jurnal Serambi Engineering Vol 6, No 2: April 2021
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v6i2.2891

Abstract

One of the alternatives in the treatment of waste  containing heavy metals is the use of natural materials as adsorbents, which is known as the biosorption process Pectin is one of the components found in plant cell wall compounds which contain many active groups that plays a key role in the biosorption process which can be used as biosorbents. In this research, the raw materials for pectin resources were orange peel and banana peel.  The effectiveness of pectin for   both ingredients will be analyzed on the basis   of 2 variables, namely the length of contact time (60, 90, 120, and 150 minutes) and the mass of pectin used (20, 30, 40, and 50 mg). The pectin of  orange and banana peel  was proven  by Fourier Transform Infrared (FTIR) analysis shown by  C=O functional group of aldehyde and carboxylic acid compounds. The results of this study indicated that the optimum condition was 150 minutes contact with the addition of 50 mg pectin  giving  the best adsorption efficiency for  orange peel pectin of 88,096% and banana peel pectin of 99,428%. From the isothermal analysis, the Langmuir and Freundlich isotherms can be applied to the adsorption of Fe metals  using orange peel and banana peel pectin with a coefficient of determination of R2 ≥ 0.9.
PENURUNAN KADAR LOGAM KADMIUM MENGGUNAKAN ADSORBEN NANO ZEOLIT ALAM ACEH Cut Raziah; Zerlinda Putri; Atika Rahmi Lubis; Sofyana; Zuhra; Suhendrayatna; Sri Mulyati
Jurnal Teknik Kimia USU Vol. 6 No. 1 (2017): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (304.913 KB) | DOI: 10.32734/jtk.v6i1.1557

Abstract

The presence of Cadmium (Cd) in groundwater is an issue that needs serious handling as it causes problems to human health. The removal of Cadmium (Cd) can be done by various methods such as adsorption, oxidation, filtration, and many more. In this study, the method used was adsorption using Aceh natural zeolite. This process was expected to reduce Cd metal as effectively as possible. The adsorption was conducted by varying contact time, adsorbent dosage, pH and initial concentration of Cd metal. The crystallized Aceh natural zeolite was characterized by X-Ray Fluorescence (XRF) with Si/Al zeolite ratio of 4.36 %. The concentration of Cadmium in water was analyzed by means of Atomic Adsorption Spectrophotometer (AAS) standard AA 630. The results showed that the adsorption of cadmium in water solution by Aceh natural zeolite occurred according to the Freundlich adsorption model. While the adsorption kinetic from the process was found to be a pseudo second order with k2 value of 1.53.
Transesterifikasi minyak kemiri sunan menjadi biodiesel menggunakan katalis padat K2O/C Muhammad Zaki; Teku Muhammad Asnawi; Husni Husin; Saifullah Ramli; Sofyana Sofyana; Fikri Hasfita; Justaman Arifin Karo Karo
Jurnal Litbang Industri Vol 10, No 2 (2020)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (886.651 KB) | DOI: 10.24960/jli.v10i2.6143.83-88

Abstract

Preparasi katalis padat K2O/C telah berhasil disiapkan dengan mengimpregnasi K2CO3 pada permukaan karbon aktif sekam padi selama 6 jam. Campuran tersebut dikalsinasi pada suhu 300 oC selama 3 jam hingga terbentuk K2O/C. Tujuan penelitian ini adalah untuk menginvestigasi kinerja katalis K2O/C dalam proses  transesterifikasi minyak biji kemiri sunan menjadi biodiesel. Karbon sekam padi (C) dipersiapkan dengan proses pirolisis sekam padi, dilanjutkan dengan proses aktivasi untuk mendapatkan karbon sebagai penyangga berpori. Katalis K2O/C  dikarakterisasi dengan Scanning Electron Microscopy (SEM) dan Energy-Dispersive X-ray (EDX). Hasil analisa EDX menunjukkan bahwa komposisi katalis didominasi oleh karbon (C) dan kalium (K). Fasa aktif K2O terdistribusi pada permukaan karbon aktif secara merata. Katalis K2O/C yang dihasilkan digunakan dalam reaksi transesterifikasi minyak kemiri sunan menggunakan reaktor batch. Yield biodiesel tertinggi dicapai hingga 98,68% ketika menggunakan katalis 4%, loading K2CO3  pada karbon aktif 0,5% berat, waktu  reaksi 90 menit, serta rasio molar metanol terhadap minyak 8:1. Katalis K2O/C sangat berpotensi untuk dikembangkan selanjutnya sebagai salah satu katalis padat untuk mengkonversi minyak nabati menjadi biodiesel.
Pembuatan Papan Partikel (Particle Board) dari Tandan Kosong Sawit dengan Perekat Kulit Akasia dan Gambir Umi Fathanah; Sofyana Sofyana
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 3 (2013): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (388.784 KB) | DOI: 10.23955/rkl.v9i3.783

Abstract

The need of wood as one of raw materials in furniture industry keeps increasing. One of efforts to reduce wood consumption is to develop research by creating composite design from material that contains sellulose to be particle board. Particle board is one of material alternatives that can be wood substitute. The objective of this research is to investigate the effect of natural-adhesive-mixture composition (acacia bark and gambier) with oil-palm-empty bunch toward mechanical property of particle board. Characterization of particle board was carried out by undertaking mechanical property testing (tensile strength and compressive strength) under wet and dry conditions. Composition variations of adhesive and oil-palm-empty bunch were 30:70; 40:60; 50:50; 60:40; 70:30. Making process of particle board is carried out by mixing oil-palm-empty bunch and adhesive with addition of 2% para-formaldehyde and water as much of 10%. Furthermore, the mixture is compressed by using Hot Press at temperature of 150oC and pressure of 10 kg/cm2 for 15 minutes. The research result indicates that the higher the adhesive composition (either adhesives of acacia bark or gambier), particle board resulted is better. In dry condition,  values of the tensile strength of particle boards  that have acacia bark adhesive and gambier adhesive have range of 84.2 - 104 Kgf/cm2 and 83.4 - 81.5 kg/cm2, respectively. Whereas, values of compressive strength of particle boards that have adhesives of acacia bark and gambier are in the range of 6.8 - 10.5 kg/cm2  and 6.3 - 9.3 kg/cm2, respectively. The values of tensile strength and compressive strength are obtained on compositions  of adhesive: oil-palm-empty bunch ≥ 40:60, and they have fulfilled satandard of SNI 03-2105-1996. The values of tensile strength and compressive strength of particle board in wet condition, either adhesives of acacia bark or gambier, have not fulfilled standard of SNI 03-2105-1996.Keywords: empty-bunch-oil palm, acacia bark, gambier, particle board, tensile strength
Pengaruh Kondisi Operasi Alat Pengering Semprot Terhadap Kualitas Susu Bubuk Jagung Zuhra Zuhra; Sofyana Sofyana; Cut Erlina
Jurnal Rekayasa Kimia & Lingkungan Vol 9, No 1 (2012): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (288.341 KB)

Abstract

Drying method is one of techniques used in food preservation. This method usually means reducing water content which is the best contiditon for microorganism growth. Higher water content also causes some enzyms needed for food decomposition cannot work well. This research aims to produce corn milk powder and to study some variables effecting on quality of corn milk powder. Hopefully the results can provide some information and produce good quality of corn milk powder. The drying process was carried out with batch process where the material was put into spray dryer and the process was allowed for the given period of time. Heat was added by direct contact to the material. The pressures of the chamber were 2, 4, 6 and 8 bars and the temperatures were 100, 150, 200 and 250oC. The best results of the research of protein, fat and water contents were 25.86 %, 18.34%, and 6.14%, recpectively.Keywords: atomizer pressure, cornmilk powder, spray dryer, temperature
Co-Authors Atika Rahmi Lubis Cut Erlina Cut Raziah Husni Husin Indah Wulan Harisma Justaman Arifin Karo Karo Muhammad Zaki Mulyati, Sri Saifullah Ramli Sri Mulyati Suhendrayatna Teku Muhammad Asnawi Umi Fathanah Widya Putri Rahayu Zerlinda Putri Zuhra Zuhra Zuhra