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All Journal VALENSI CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis JURNAL PHARMASCIENCE Jurnal Riset Industri Hasil Hutan Pharmascience Jurnal Fisika FLUX JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Pengabdian Kepada Masyarakat (Mediteg) Berkala Penelitian Hayati Jurnal Ilmiah Berkala: Sains dan Terapan Kimia Bioscientiae, Jurnal ilmu ilmu Biologi Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis

Maria Dewi Astuti

Universitas Lambung Mangkurat

Author-ID : 236006

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Veterinary

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One-pot Selective Conversion of Biomass-derived Furfural into Cyclopentanone/Cyclopentanol over TiO2 Supported Bimetallic Ni-M (M = Co, Fe) Catalysts Maria Dewi Astuti; Ditya Kristina; Rodiansono Rodiansono; Dwi Rasy Mujiyanti
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 1 Year 2020 (April 2020)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.1.6307.231-241

One-pot selective conversion of biomass-derived furfural (FFald) into cyclopentanone (CPO) or cyclopentanol (CPL) using bimetallic nickel-based supported on TiO2 (denoted as Ni-M(3.0)/TiO2; M = Co and Fe; 3.0 is Ni/M molar ratio) have been investigated. Catalysts were synthesized via a hydrothermal method at 150 °C for 24 h, followed by H2 reduction at 450 °C for 1.5 h. X-ray Diffraction (XRD) analysis showed that the formation of Ni-Co alloy phase at 2θ = 44.2° for Ni-Co(3.0)/TiO2 and Ni-Fe alloy at 2θ = 44.1° for Ni-Fe(3.0)/TiO2. The amount of acid sites was measured by using ammonia-temperature programmed desorption (NH3-TPD). Ni-Co(3.0)/TiO2 has three NH3 desorption peaks at 180 °C, 353 °C, and 569 °C with acid site amounts of 1.30 µmol.g-1, 1.0 µmol.g-1, and 2.0 µmol.g-1, respectively. On the other hand, Ni-Fe(3.0)/TiO2 consisted of NH3 desorption peaks at 214 °C and 626 °C with acid site amounts of 3.3 µmol.g-1and 2.0 µmol.g-1, respectively. Both Ni-Co(3.0)/TiO2 and Ni-Fe(3.0)/TiO2 catalysts were found to be active for the selective hydrogenation of FFald to furfuryl alcohol (FFalc) at low temperature of 110 °C, H2 3.0 MPa, 3 h with FFalc selectivity of 81.1% and 82.9%, respectively. High yields of CPO (27.2%) and CPL (41.0%) were achieved upon Ni-Fe(3.0)/TiO2 when the reaction temperature was increased to 170 °C, 3.0 MPa of H2, and a reaction time of 6 h. The yield of CPO+CPL on the reused catalyst decreased slightly after the second reaction run, but the activity was maintained for at least three consecutive runs. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Selective Hydrogenation of Stearic Acid to 1-Octadecanol Using Bimetallic Palladium-Tin Supported on Carbon Catalysts at Mild Reaction Conditions Rodiansono Rodiansono; Elisa Hayati; Atina Sabila Azzahra; Maria Dewi Astuti; Kamilia Mustikasari; Sadang Husain; Sutomo Sutomo
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.11895.888-903

Bimetallic palladium-tin catalysts supported on microporous carbon (denoted as Pd-Sn(x)/C, loading amount of Pd = 5 wt% and x = Pd/Sn molar ratio; c.a. 3.0; 1.5; and 1.0) showed high selectivity in the hydrogenation of stearic acid towards 1-octadecanol (stearyl alcohol) under mild reaction conditions. Pd-Sn(x)/C catalysts were synthesized via the hydrothermal method at temperature of 150 °C for 24 h, and reduced with H2 at 400 °C for 3 h. Pd-Sn(1.5)/C catalyst exhibited the highest yield of stearyl alcohol (1-octadecanol) (up to 73.2%) at 100% conversion of stearic acid at temperature 240 °C, initial H2 pressure of 3.0 MPa, a reaction time of 13 h, and in 2-propanol/water solvent. The high selectivity of alcohols over Pd-Sn(1.5)/C catalyst can be attributed to the formation of bimetallic Pd-Sn alloy phases (e.g. Pd3Sn and Pd3Sn2) as obviously depicted by XRD analysis. The presence of co-promotor Sn and the formation of bimetallic may play a pivotal role in the high selectivity of 1-octadecanol. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Selective Hydrogenation of Biomass-derived Furfural over Supported Ni3Sn2 Alloy: Role of Supports Rodiansono Rodiansono; Maria Dewi Astuti; Syahrul Khairi; Shogo Shimazu
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Department of Chemical Engineering - Diponegoro University

A highly active and selective hydrogenation of biomass-derived furfural into furfuryl alcohol was achieved using supported single phase Ni3Sn2 alloy catalysts. Various supports such as active carbon (AC), g-Al2O3, Al(OH)3, ZnO, TiO2, ZrO2, MgO, Li-TN, and SiO2 have been employed in order to understand the role of the support on the formation of Ni3Sn2 alloy phase and its catalytic performance. Supported Ni3Sn2 alloy catalysts were synthesised via a simple hydrothermal treatment of the mixture of aqueous solution of nickel chloride hexahydrate and ethanol solution of tin(II) chloride dihydrate in presence of ethylene glycol at 423 K for 24 h followed by H2 treatment at 673 K for 1.5 h, then characterised by using ICP-AES, XRD, H2- and N2-adsorption. XRD profiles of samples showed that the Ni3Sn2 alloy phases are readily formed during hydrothermal processes and become clearly observed at 2θ = 43-44o after H2 treatment. The presence of Ni3Sn2 alloy species that dispersed on the supports is believed to play a key role in highly active and selective hydrogenation of biomass-derived furfural towards furfuryl alcohol. Ni3Sn2 on TiO2 and ZnO supports exhibited much lower reaction temperature to achieved >99% yield of furfuryl alcohol product compared with other supports. The effects of loading amount of Ni-Sn, reaction conditions (temperature and time profile) on the activity and selectivity towards the desired product are systematically discussed.

Selective Hydrogenation of Dodecanoic Acid to Dodecane-1-ol Catalyzed by Supported Bimetallic Ni-Sn Alloy Rodiansono Rodiansono; Muhammad Iqbal Pratama; Maria Dewi Astuti; Abdullah Abdullah; Agung Nugroho; Susi Susi
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 2 Year 2018 (August 2018)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.2.1790.311-319

Selective hydrogenation of dodecanoic acid over supported bimetallic Ni-Sn alloy catalysts into dodecane-1-ol is demonstrated. Bimetallic nickel-tin supported on titanium oxide (Ni-Sn(1.5)/TiO2) and gamma-alumina (Ni-Sn(1.5)/g-Al2O3); 1.5 = Ni/Sn molar ratio) were synthesized via hydrothermal method in a sealed-Teflon autoclave reactor at 150 oC for 24 h, then followed by reducing with hydrogen gas at 400 oC for 1.5 h. The synthesized catalysts were characterized by means of XRD, IC-AES, N2-adsorption (BET method), H2-chemisorption, and NH3-TPD. Bimetallic Ni-Sn(1.5)/TiO2 catalyst was found to be effective for hydrogenation of dodecanoic acid (>99 % conversion) to dodecane-1-ol (93% yield) at 160 oC, 30 bar H2, and 20 h and the highest dodecane-1-ol (97 % yield) was obtained at initial pressure of H2, 50 bar. An increase of reaction temperature slightly enhanced the degree of hydrodeoxygenation of dodecanoic acid to produce dodecane over both Ni-Sn(1.5)/TiO2 and Ni-Sn(1.5)/g-Al2O3 catalysts.

The Promotion Effect of Cu on the Pd/C Catalyst in the Chemoselective Hydrogenation of Unsaturated Carbonyl Compounds Kamilia Mustikasari; Rodiansono Rodiansono; Maria Dewi Astuti; Sadang Husain; Sutomo Sutomo
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 2 Year 2021 (June 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.2.10398.267-279

Highly efficient and selective hydrogenation of a,b-unsaturated carbonyl compounds to unsaturated alcohol using bimetallic palladium-copper supported on carbon (denoted as Pd-Cu(3.0)/C; 3.0 is Pd/Cu molar ratio) catalyst is demonstrated. Pd-Cu(3.0)/C catalyst was prepared via a simple hydrothermal route under air atmosphere at 150 °C for 24 h followed by reduction with hydrogen at 400°C for 1.5 h. The chemoselective hydrogenation of typical a,b-unsaturated carbonyl ketone (2-cyclohexene-1-one) and aldehyde (trans-2-hexenaldehyde), and chemoselective hydrogenation of FFald and (E)-non-3-en-2-one mixture demonstrated high productivity, leading to high selectivity of unsaturated alcohols. The presence of bimetallic Pd-Cu alloy phase with relatively high H2 uptakes was observed, enabling to preferentially hydrogenate C=O rather than to C=C bonds under mild reaction conditions. Pd-Cu(3.0)/C catalyst was found to stable and reusable for at least four reaction runs and the activity and selectivity of the catalyst can be restored to the original after rejuvenation with H2 at 400 °C for 1.5 h. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

STRUKTUR ANATOMI DAN AKTIVITAS ANTIOKSIDAN BULBUS BAWANG DAYAK (Eleutherine americana MERR.) DARI DAERAH KALIMANTAN SELATAN Evi Mintowati Kuntorini; Maria Dewi Astuti; L. Hartanto Nugroho
JURNAL PENELITIAN BIOLOGI BERKALA PENELITIAN HAYATI Vol 16 No 1 (2010): December 2010
Publisher : The East Java Biological Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23869/276

The aim of this research were to study the characterization of the microscopic anatomy and testing the antioxidant activity of bawang dayak bulb from several regions in South Kalimantan. Bawang dayak plant samples taken from four (4) regency in South Kalimantan. Bulb anatomical structure was observed by the paraffin method and test preparations of antioxidant activity by DPPH method. IC50 values were calculated based on the formula of the regression equation.The bulb anatomical structures has an epidermis tissue of both surfaces, there is parenchymal tissue. Transport tissue were located in rows with collateral type, there are starch grains in parenchyma cells, and the presence of stiloid crystals between cells parenkim. Extract ethanol bawang dayak bulb from the four districts in South Kalimantan has antioxidant activity against DPPH radicals. The highest antioxidant activity showed on the sample from location1 Comets Village Banjarbaru Municipality (IC50 = 25.3339 μg/ml) and the lowest showed on the sample from location 2 Sungai Paring Village Banjar District (IC50 = 86.9039 μg/ml). Antioxidant activity of bawang dayak extract 4.5 to 15 times weaker compared to BHT (BHT IC50 = 5.5707 μg/ml).

Selective Hydrogenation of Sucrose into Sugar Alcohols over Supported Raney Nickel-Based Catalysts Rodiansono Rodiansono; Maria Dewi Astuti; Dwi Rasy Mujiyanti; Uripto Trisno Santoso
Indonesian Journal of Chemistry Vol 19, No 1 (2019)
Publisher : Universitas Gadjah Mada

Selective hydrogenation of sugars (e.g. sucrose, cellobiose, glucose, fructose, xylose, arabinose) into sugar alcohols (sorbitol, mannitol, xylitol, arabitol) can be achieved by means of supported Raney Ni-based catalysts. Various supporting materials such as the layered structure of clay (e.g. bentonite, taeniolite, smectite), metal oxides (e.g. Nb2O5, ZrO2, Al2O3), and conventional supports (e.g. carbon, silica, zeolite (JRC-SZ1)) were employed to obtain high performance of supported Raney Ni-based catalysts. The conventional Raney Ni, Raney Ni/AlOH, and Ni-NP with relatively high dispersion exhibited superior catalytic activity compared with the various supported Raney Ni catalysts with the conversion of 100% and hexitols selectivity almost ~99%. The H2 treatment of Raney Ni/SMT at a temperature of 473–773 K caused the increase in Ni(111) crystallite sizes as the conversion of sucrose with compromised decreased of hexitols product. The presence of acidic co-catalyst such as SnO, amberlyst-15, JRC-SZ1, JRC-Z5-9OH1 on Raney Ni/AlOH catalyst significantly enhanced the formation of glycerol product even though the conversion of sucrose compromised decreased owing to the partial leaching of Ni metal into the reaction mixture.

ISOLASI SELULOSA DARI JERAMI PADI MENGGUNAKAN VARIASI KONSENTRASI BASA Dewi Umaningrum; Radna Nurmasari; Maria Dewi Astuti; Mardhatillah Mardhatillah; Ani Mulyasuryani; Diah Mardiana
Jurnal Sains dan Terapan Kimia Vol 12, No 1 (2018)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Telah dilakukan penelitian tentang isolasi selulosa dari jerami padi menggunakan variasi konsentrasi basa. Pada penelitian ini dipelajari tentang pengaruh basa dan variasi konsentrasinya dalam isolasi selulosa dari jerami padi. Kajian pengaruh basa dan konsentrasi dilakukan dengan melarutkan ekstrak jerami padi pada NaOH dan KOH dengan variasi konsentrasi 1%, 3%, 5%, 7% dan 9% dan kemudian dilakukan analisis IR terhadap selulosa hasil isolasi serta dihitung rendemen selulosa dan lignin sisa. Hasil penelitian menunjukkan bahwa pada isolasi selulosa dari jerami padi digunakan NaOH 7% dengan rendemen selulosa yang diperoleh sebesar 33,63% dengan lignin sisa sebesar 2,42%.Kata kunci : isolasi, selulosa, lignin sisa

PENINGKATAN KUALITAS BIO-OIL HASIL PIROLISIS MINYAK KELAPA SAWIT MENGGUNAKAN REAKSI EPOKSIDASI DAN HIDROKSILASI Istiqomah Istiqomah; Abdullah Abdullah; Maria Dewi Astuti
Jurnal Sains dan Terapan Kimia Vol 14, No 2 (2020)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Bio-oil hasil pirolisis minyak kelapa sawit mengandung senyawa alkena yang dapat digunakan dalam pembuatan senyawa alkohol. Konversi senyawa alkena menjadi alkohol dilakukan melalui dua tahap, yaitu epoksidasi dan hidroksilasi. Penelitian ini bertujuan untuk mempelajari reaksi epoksidasi dengan mengetahui pengaruh rasio mol asam perasetat (CH3COOH/H2O2)dan waktu reaksi terhadap bilangan hidroksil senyawa alkohol yang dihasilkan. Epoksidasi bio-oil hasil pirolisis minyak kelapa sawit dilakukan dengan mereaksikan alkena dengan asam perasetat. Variasi yang dilakukan yaitu rasio mol asam perasetat0,5; 1; 2; 3; 4 dan waktu reaksi epoksidasi selama 60, 90, 120, 150, dan 180 menit. Pada bio-oil terepoksidasi, selanjutnya dilakukan hidroksilasi selama 120 menit menggunakan campuran metanol dan isopropanol. Hasil penelitian menunjukkan bahwa kondisi optimum rasio mol asam perasetatadalah 2 dan waktu reaksi selama 120 menit. Senyawa alkohol yang dihasilkan memiliki nilai bilangan hidroksil 171,105 mg KOH/g.

TOKSISITAS EKSTRAK N-HEKSANA DAN METANOL DAUN KELOPAK TAMBAHAN TUMBUHAN PERMOT (Passiflora foetida L) Maria Dewi Astuti; Dewi Umaningrum; Kamilia Mustikasari
Jurnal Sains dan Terapan Kimia Vol 8, No 2 (2014)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Telah dilakukan penelitian tentang skrining fitokimia dan uji toksisitas ekstrak n-heksana dan metanol dari daun kelopak tambahan tumbuhan permot (Passiflora foetida L). Skrining fitokimia dilakukan berdasarkan uji kualitatif dengan pereaksi spesifik untuk fitokimia tertentu dan uji toksisitas dilakukan berdasarkan metode BSLT (Brine Shrimps Lethality Test). Hasil penelitian tentang skrining fitokimia menunjukkan bahwa ekstrak n-heksana mengandung alkaloid, flavonoid, dan steroid sedangkan ekstrak metanol mengandung alkaloid, flavonoid, tanin, triterpenoid, steroid, dan saponin. Uji toksisitas memperlihatkan bahwa ekstrak metanol lebih toksik (LC50 546,56 ppm) daripada ekstrak n-heksana (LC50 821,41 ppm). Kata kunci: skrining fitokimia, uji toksisitas, permot, Passiflora foetida L, daun kelopak tambahan

Co-Authors Abdul Ghofur Abdul Ghofur Abdullah A. Abdullah Abdullah Abdullah Abdullah Abdullah Adi Maulana Agung Nugroho Ani Mulyasuryani Anni Nurliani Atina Sabila Azzahra Azidi Irwan Budi Prayitno Dahlena Ariyani Devia Salastiansyah Elwaty Dewi Umaningrum Dewi Umaningrum Diah Mardiana Diah Mardiana Ditya Kristina Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Edi Mikrianto Elisa Hayati Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Faisal F. Faisal Farah Eka Putri Wisuda Hasanuddin Hasanuddin Husain, Sadang Istiqomah Istiqomah Kamilia Mustikasari Kamilia Mustikasari Kamilia Mustikasari Karlini Karlini kholifatu rosyidah Kholifatu Rosyidah Kiki Amalia Wardhani Kiky C SEMBIRING Kiky C. Sembiring L. Hartanto Nugroho Lathifah Fauzi Lisda Karmila Mahrita Wulandari Mardhatillah Mardhatillah Mardi Santoso Maria Muftiana Maulisa Rahmah Muhamat Muhamat Muhammad Agus Muljanto Muhammad Iqbal Pratama Nadia Sasanti Nenci Ratna Dewanti Noer Komari Nor Latifah Norma Milina Pradita, Hapsari Tyas Radna Nurmasari Rahmidah Ulfah R. Rahmida Ulfah Risnu Aritofa Rodiansono Rodiansono Sadang Husain Sadang Husain Saputri, Revita Shofia Qalby Shogo Shimazu Siska Siska Siska Siska Siti Hasnah Susi Susi Sutomo Sutomo Sutomo Sutomo Sutomo Sutomo Syahrul Khairi Tantriati T. Tantriati Taslim Ersam Taslim Ersam Tuti Sriwinarti Uripto Trisno Santoso Uripto Trisno Santoso Widiyanto, Gregorius

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