Sudiyarmanto Sudiyarmanto
Research Center for Chemistry, Indonesian Institute of Science, Komplek PUSPIPTEK Serpong Tangerang Banten 15413

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PERFORMANCE OF MODIFIED NATURAL ZEOLITES BY SODIUM HYDROXIDE TREATMENTS IN THE ESTERIFICATION OF GLYCEROL AND OLEIC ACID Fauzi, Rizky Achmad; Tursiloadi, Silvester; Dwiatmoko, Adid Adep; Sukandar, Dede; Aulia, Fauzan; Rinaldi, Nino; Sudiyarmanto, Sudiyarmanto
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 5, No. 2, November 2019
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Syarif Hidayatullah State Islamic Uni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (841.828 KB) | DOI: 10.15408/jkv.v5i2.9976

Abstract

Esterification is the reaction of the formation of an ester compound by reacting an alcohol compound and carboxylic acid. In this study, the performance of zeolite-based catalysts has been studied for esterification reactions. Modification of zeolite pore size was done to be hierarchical zeolite, with the aim of increasing the catalytic properties of zeolite. The modification was carried out by desilication by sodium hydroxide treatment with a variation of 0.1; 0.3; 0.5 M. The resulting catalyst was then characterized using BET and XRD. Furthermore, the catalyst was tested for activity for esterification of fatty acids and glycerol and the product was analyzed using GC-MS. Zeolite modification with sodium hydroxide has been proven to improve catalyst performance, without changing their crystal structure. The best catalytic activity was obtained on the catalyst with sodium hydroxide treatment of 0.3 M, resulting glycerol conversion of 92% and selectivity to monoglycerides of 74%.
Effect of Non Ionic Surfactant Addition to Cellulase Performance in High-Substrate-Loading-Hydrolysis of Palm Oil EFB and Water-Hyacinth Bardant, Teuku Beuna; Sudiyarmanto, Sudiyarmanto; Abimanyu, Haznan; Hanum, Aisha Kania
Indonesian Journal of Chemistry Vol 13, No 1 (2013)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2722.097 KB) | DOI: 10.22146/ijc.21326

Abstract

Enzymatic hydrolysis with high substrate loading of palm oil (Elaeis guineensis) empty fruit bunch (EFB) and water-hyacinth (Eichhornia crassipes) were investigated as a prior part of ethanol production from lignocelluloses. Commercial surfactant Span 85 and Tween 20 were used as cellulase performance enhancer in hydrolysis process with substrate loading above 20% (w/w). Cellulase performances were compared based on hydrolysis conversion. Hydrolysis conversions of EFB using cellulase with concentration 10 and 15 FPU/g-substrate was 38.55% and 88.80% respectively. Addition 2% (v/v) of Tween 20 to EFB hydrolysis reaction with cellulase concentration 10 FPU/g-substrate gave the conversion 87.30%. This addition enhance the cellulase performance up to 226.5% or similar with the performance of cellulase 15 FPU/g substrate. Addition 2% (v/v) of Span 85 to the similar reaction only enhances cellulase performance to 174.7%. Hydrolysis conversion of boiling-pretreated water-hyacinth and autoclave-pretreated water-hyacinth using cellulase 15 FPU/g-substrate was 45.84% and 52.29% respectively. Addition 2% (v/v) of Tween 20 and Span 85 to boiling-pretreated water-hyacinth hydrolysis with cellulase concentration 15 FPU/g-substrate enhance cellulase performance of 128.9% and 153.5% respectively. Addition 1% (v/v) of Tween 20 and Span 85 to the similar reaction with cellulase concentration 10 FPU/g-substrate gave conversions 51.00% and 53.79% respectively, or similar with conversion of autoclave-pretreated water-hyacinth hydrolysis with 15 FPU/g-substrate.
Pengaruh Proses Pemutihan Multi Tahap Serat Selulosa Dari Limbah Tandan Kosong Kelapa Sawit Septevani, Athanasia Amanda; Burhani, Dian; Sudiyarmanto, Sudiyarmanto
Jurnal Kimia dan Kemasan Vol. 40 No. 2 Oktober 2018
Publisher : Balai Besar Kimia dan Kemasan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (198.8 KB) | DOI: 10.24817/jkk.v40i2.3508

Abstract

Penelitian ini bertujuan untuk meningkatkan kandungan selulosa limbah tandan kosong kelapa sawit melalui proses bertahap delignifikasi NaOH dilanjutkan dengan pemutihan menggunakan NaClO2. Hasil penelitian menunjukkan bahwa kandungan selulosa limbah tandan kosong kelapa sawit berhasil ditingkatkan hingga hampir dua kali dari 37,6 ± 0,3% menjadi 84,2 ± 0,3%. Lebih lanjut, proses pemutihan multi tahap menggunakan NaClO2 dapat menurunkan kandungan lignin tandan kosong kelapa sawit menjadi sebesar 3,1 ± 0,2% hampir sama dengan standar selulosa, yaitu 2,6%. Penggunaan NaClO2 juga mampu menurunkan kadar hemiselulosa  hingga 12,6%, lebih rendah dibandingkan standar selulosa, yaitu 16,6%. Dari hasil FTIR, gugus puncak serapan selulosa meningkat secara signifikan, sedangkan hemiselulosa dan lignin mengalami penurunan intensitas. Analisa SEM menunjukkan bahwa proses delignifikasi basa dan pemutihan menyebabkan permukaan serat TKS berpori dan bersih yang mengindikasikan berkurangnya lignin dan hemiselulosa. Berdasarkan hasil penelitian ini, proses delignifikasi NaOH dan pemutihan NaClO2 memiliki selektivitas tinggi yang dapat secara simultan mengurangi kadar hemiselulosa dan lignin tanpa merusak struktur selulosa.
PENGARUH KONSENTRASI PERLAKUAN AWAL ALKALI TERHADAP ENZYMATIC DIGESTIBILITY PADA PROSES SAKARIFIKASI LIMBAH PELEPAH KELAPA SAWIT Sudiyarmanto, Sudiyarmanto
Jurnal Ilmiah Teknik Kimia Vol 2, No 2 (2018): Jurnal Ilmiah Teknik Kimia
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.942 KB) | DOI: 10.32493/jitk.v2i2.1684

Abstract

ABSTRAKBiomasa lignoselulosa dapat diperoleh dari berbagai limbah pertanian, limbah industri kertas, limbah hasil hutan dan limbah perkebunan. Salah satu contoh limbah perkebunan yang jumlahnya sangat melimpah di Indonesia adalah pelepah kelapa sawit. Limbah biomasa ini dapat dikonversi menjadi gula-gula sederhana (gula fermentasi) melalui dua tahapan, yaitu proses perlakuan awal dan hidrolisis secara enzimatis (sakarifikasi). Penelitian ini bertujuan untuk mengetahui pengaruh konsentrasi perlakuan awal alkali terhadap enzymatic digestibility pada proses sakarifikasi pelepah kelapa sawit. Proses perlakuan awal pelepah kelapa sawit dengan variasi konsentrasi alkali 4-15 %(w/w) dilakukan pada kondisi rasio solid/liquid 1:5, temperatur 150oC dan tekanan awal 5 bar selama 30 menit. Sedangkan proses sakarifikasi dilakukan pada konsentrasi substrat 15 %(w/v), konsentrasi enzim selulase 15 FPU/g substrat menggunakan buffer asam sitrat pH 4,8 pada kondisi operasi; temperatur 50 oC, kecepatan 150 rpm dan waktu 72 jam. Hasil penelitian menunjukkan bahwa konsentrasi NaOH 10 %(w/w) yang digunakan pada proses perlakuan awal alkali menghasilkan kadar selulosa tertinggi (69,38 %) dan kadar lignin terendah (13,34 %). Proses sakarifikasi dengan variabel ini dapat menghasilkan kadar glukosa sebesar 8,40 %(w/w) dan kadar xilosa sebesar 1,97 %(w/w). Sedangkan ED selulosa dan ED hemiselulosa yang diperoleh pada kondisi ini berturut-turut sebesar 12,07 % dan 24,28 %. Kata kunci : pelepah, kelapa sawit, perlakuan awal, sakarifikasi, enzymatic digestibility