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IbM KELOMPOK PEMBUAT BATU BATA DI KELURAHAN GUNTUNG MANGGIS, KECAMATAN LANDASAN ULIN, KOTA BANJARBARU Dahlena Ariyani; Dwi Rasy Mujiyanti; Maria Dewi Astuti; Rodiansono Rodiansono
Jurnal Pengabdian Kepada Masyarakat (MEDITEG) Vol 3 No 1 (2018): Jurnal Pengabdian Kepada Masyarakat MEDITEG
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Tanah Laut (Politala)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/mediteg.v3i1.22

Abstract

Program IbM ini bertujuan untuk meningkatkan pendapatan pembuat batu bata di Kelurahan Guntung Manggis.Proses pembuatan batu bata yang lebih ramah lingkungan dan ekonomis dengan komposisi pemanfaatan silika, salahsatunya dari abu sekam padi. Batu bata tanpa proses pembakaran yang memiliki kualitas tinggi tidak kalah di pasarandengan batu bata konvesional sehingga akan menghasilkan keuntungan yang lebih baik. Kegiatan IbM yang dilaksanakanmelibatkan kelompok pembuat batu bata di Kelurahan Guntung Manggis terhadap dua mitra Kelompok pembuat batubata Kuranji dan Kelompok pembuat batu bata Sei Salak. Kegiatan yang dilaksanakan terhadap Mitra I dan Mitra II berupapelatihan pembuatan batu bata tanpa pembakaran yaitu dengan penambahan silika dalam proses produksi batu bata. Prosespembuatan dengan metode tersebut akan menjadikan suatu pengetahuan yang baru dan dapat memanfaatkan sertamengurangi limbah sekam padi yang ada. Luaran kegiatan ini berupa teknologi Green Construction dimana batu bata silikadibuat dari tanah liat dan limbah sekam padi tanpa pembakaran dan pemahaman manajemen usaha sehingga pendapatanyang diperoleh meningkat. Berdasarkan analisis ekonomi bata konvensional dan bata tanpa pembakaran dengan skalaproduksi 100 buah bata, dapat dikalkulasikan terjadinya pengurangan biaya produksi sehingga menjadikan penguranganharga jual bata dibandingkan dengan bata konvensional dengan nilai pengurangan berkisar Rp. 63,5 per bata.
ANALISIS SPEKTROSKOPI INFRAMERAH TRANSFORMASI FOURIER (FTIR) DAN PERUBAHAN WARNA LIGNOSELULOSA ALANG-ALANG (Imperata cylindrica) SETELAH PRETREATMENT MENGGUNAKAN ASAM ENCER Asma Fauziah; Rodiansono Rodiansono; Sunardi Sunardi
Konversi Vol 8, No 1 (2019): April 2019
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/k.v8i1.6506

Abstract

Abstrak. Alang-alang (Imperata cylindrica) mengandung sekitar 59% holoselulosa dan dapat digunakan sebagai bahan baku bioetanol. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pretreatment menggunakan asam encer terhadap karakteristik struktur kimia pada lignoselulosa alang-alang. Pretreatment dilakukan menggunakan asam encer dengan konsentrasi H2SO4 1%, 2%, 3% dan 4% pada suhu 210°C dalam autoclave selama 45 menit. Analisis perubahan struktur secara kimia setelah pretreatment dengan asam encer dilakukan menggunakan Spektroskopi Inframerah Transformasi Fourier (FTIR). Analisis perubahan warna dilakukan dengan metode CIELAB. Hasil yang diperoleh dari spektra FTIR mengindikasikan bahwa asam encer mendekontruksi strukur kimia dari alang-alang dengan melarutkan hemiselulosa selama proses pretreatment. Perubahan warna (ΔE) berkolerasi dengan modifikasi struktur kimia pada lignoselulosa alang-alang. Kata Abstrak. Alang-alang (Imperata cylindrica) mengandung sekitar 59% holoselulosa dan dapat digunakan sebagai bahan baku bioetanol. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh pretreatment menggunakan asam encer terhadap karakteristik struktur kimia pada lignoselulosa alang-alang. Pretreatment dilakukan menggunakan asam encer dengan konsentrasi H2SO4 1%, 2%, 3% dan 4% pada suhu 210°C dalam autoclave selama 45 menit. Analisis perubahan struktur secara kimia setelah pretreatment dengan asam encer dilakukan menggunakan Spektroskopi Inframerah Transformasi Fourier (FTIR). Analisis perubahan warna dilakukan dengan metode CIELAB. Hasil yang diperoleh dari spektra FTIR mengindikasikan bahwa asam encer mendekontruksi strukur kimia dari alang-alang dengan melarutkan hemiselulosa selama proses pretreatment. Perubahan warna (ΔE) berkolerasi dengan modifikasi struktur kimia pada lignoselulosa alang-alang. Kata kunci: Imperata cylindrica, hidrotermal, asam encer, FTIR
Pengaruh Penyaringan dan Pengeringan Terhadap Ukuran Partikel Oksida Besi: Tinjauan Karakterisasi Kualitatif Menggunakan Mikroskop Optik Uripto Trisno Santoso; Rodiansono Rodiansono; Ahmad Budi Junaidi; Citra Ariyanti; Radhina Oktari; Puput Nopitasari; Hasanah Hasanah
Jurnal Fisika FLUX Vol 1, No 1 (2019): Jurnal Fisika Flux Edisi Khusus Januari 2019
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1026.591 KB) | DOI: 10.20527/flux.v1i1.6144

Abstract

Karakterisasi ukuran partikel menjadi salah satu parameter yang sangat penting dalam uji keberhasilan sintesis mikro- maupun nanomaterial. Walaupun secara teori sudah diketahui bahwa beberapa perlakuan fisika seperti proses penyaringan dan pengeringan dapat berpengaruh terhadap ukuran partikel sampel, tetapi perlakuan ini sering diabaikan sehubungan dengan beberapa teknik karakterisasi, misalnya SEM (scanning electron microscopy) mempersyaratkan sampelnya berbentuk serbuk kering.Penelitian ini bertujuanuntukmendapatkan data imiahtentang pengaruh penyaringan dan pengeringan terhadap ukuran partikel oksida besidengan karakterisasi secara kualitatif menggunakan mikroskop optik. Hasil penelitian menunjukkan bahwa proses penyaringan dan pengeringan dapat mempengaruhi ukuran partikel.
Efek promosi Fe pada katalis dua logam Ni-Fe terembankan pada aluminium hidroksida pada hidrogenasi selektif asam levulinat menjadi gamma-valerolakton dalam air Rodiansono R. Rodiansono; Faisal F. Faisal; Tantriati T. Tantriati; Rahmidah Ulfah R. Rahmida Ulfah; Abdullah A. Abdullah; Astuti Maria Dewi
JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Vol 3, No 1 (2019)
Publisher : State University of Malang or Universitas Negeri Malang (UM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (266.894 KB) | DOI: 10.17977/um0260v3i12019p001

Abstract

Efek promosi penambahan logam Fe pada Raney Ni terembankan pada aluminium hidroksida (Raney Ni/AlOH) untuk membentuk katalis Ni-Fe(x)/AlOH (x = rasio molar Ni/Fe) pada reaksi hidrogenasi selektif asam levulinat menjadi gamma-valerolakton telah dipelajari secara sistematis. Katalis Ni-Fe(x)/AlOH telah berhasil disintesis menggunakan metode poliol dalam kondisi hidrotermal dengan variasi nilai x = 1,0; 1,8; 2,3; 2,8; dan 3,0 berdasarkan perhitungan bahan awal. Hasil karakterisasi XRD menunjukkan bahwa posisi puncak Ni(111) pada sudut difraksi 2q = 44,84° mengalami pergeseran ke sudut difraksi yang lebih kecil pada sudut difraksi 2θ = 44,54o-44,11o yang merupakan puncak difraksi karakterisitik untuk alloy dua logam Ni-Fe(111). Penambahan sebanyak 3,0 mmol Fe menghasilkan katalis Ni-Fe(3,0)/AlOH meningkatkan secara signifikan aktivitas dan selektifitasnya pada reaksi hidrogenasi asam levulinat (LA) menjadi γ-valerolakton (GVL) pada suhu 130oC, tekanan awal gas H2 3,0 MPa, dan waktu reaksi 1,5 jam.  Kenaikan suhu reaksi, perpanjangan waktu reaksi, dan reduksi dengan gas H2 terhadap katalis pada 450oC selama 1,5 jam mampu meningkatkan konversi LA dan yield GVL hingga 100%. Sebaliknya peningkatan jumlah Fe yang ditambahkan hingga 9.0 mmol menyebabkan aktifitas dan selektiftas katalis menurun secara gradual. Katalis Ni-Fe(3,0)/AlOH bisa digunakan hingga dua kali pengulangan tanpa berkurang aktivitas dan selektifitasnya.
Selective Conversion of 2-Methylfuran to 1,4-Pentanediol Catalyzed by Bimetallic Ni-Sn Alloy Rodiansono Rodiansono; Astuti Maria Dewi; Sadang Husain; Agung Nugroho; Sutomo Sutomo
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1766.934 KB) | DOI: 10.9767/bcrec.14.3.4347.529-541

Abstract

The selective conversion of 2-methylfuran (2-MeF) to 1,4-pentanediol (1,4-PeD) over bimetallic nickel-tin alloy catalysts in the ethanol/H2O solvent mixture was studied. By using bulk Ni-Sn(x); x = 3.0 and 1.5 catalysts, a maximum yield of 1,4-PeD (49%) was obtained at 94% conversion of 2-MeF. The dispersion of Ni-Sn(x) on the aluminium hydroxide (AlOH) or g-Al2O3 supports allowed to an outstanding yield of 1,4-PeD (up to 64%) at 433 K, 3.0 MPa of H2 within 12 h. Ni-Sn(3.0)/AlOH catalyst was found to be reusable and the treatment of the recovered Ni-Sn(3.0)/AlOH catalyst with H2 at 673 K for 1 h restored the catalyst’s original activity and selectivity. 
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

Abstract

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

Abstract

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). 
One-pot Synthesis of Carbon-doped TiO2 with Bimetallic Ni-Ag co-catalysts in Photodegradation of Methylene Blue under UV and Visible Irradiation Kurnia Putri; Annisa Annisa; Sadang Husain; Rodiansono Rodiansono
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 | Full PDF (826.07 KB) | DOI: 10.9767/bcrec.15.1.4811.35-42

Abstract

Carbon modified-titanium dioxide (@C-TiO2) was prepared by one-pot procedure from TiCl4 and glucose under hydrothermal conditions at 150 ºC for 24 hours. The obtained @C-TiO2 was employed as support for Ni-Ag(3.0)@C-TiO2 nanocomposite (3.0 is the Ni/Ag molar ratio). The synthesized catalysts were characterized by means of XRD and UV-Vis DRS Spectroscopy. The XRD patterns of @TiO2 show the brookite as the main phase, meanwhile the main phase in the @C-TiO2, Ni-Ag(3.0)@TiO2 and Ni-Ag(3.0)@C-TiO2 nanocomposites were anatase. The band gap of the TiO2 sample slightly shifted to the visible range after the addition of C dopant or Ni-Ag(3.0) co-catalyst as indicated by UV-Vis DRS spectra. Ni-Ag(3.0)@C-TiO2 catalyst showed high photocatalytic activity for photodegradation of MB under both UV and visible irradiations at 60 ºC within 2 hours with maximum MB conversion of 67.5% and 54.1%, respectively. The synergistic action of C dopant or Ni-Ag(3.0) co-catalyst is believed to be important in the improvement of photocatalytic activity of @TiO2. 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 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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (739.187 KB) | DOI: 10.9767/bcrec.11.1.393.1-9

Abstract

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

Abstract

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. 
Co-Authors A.A. Ketut Agung Cahyawan W Abdul Ghofur Abdul Ghofur Abdullah A. Abdullah Abdullah Abdullah Abdullah Abdullah Abdullah Abdullah Adi Maulana Agung Nugroho Agus Riyanto Ahmad Budi Junaidi Anggono Wijaya Anggono Wijaya Anggono Wijaya Annisa Annisa Asma Fauziah Atina Sabila Azzahra Atina Sabila Azzahra Azidi Irwan Azzahra, Atina Sabila Bodoi, Thea Seventina Desiani Budi Junaidi, Budi Chairul Irawan Citra Ariyanti Dahlena Ariyani Dewi Umaningrum Dewi Umaningrum Ditya Kristina Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Edi Mikrianto Elisa Hayati Faisal F. Faisal Hasanah Hasanah Heny Puspita Dewi Husain, Sadang Ina Risnawati Jaka Darma Jaya Joko Santoso Kamilia Mustikasari Kamilia Mustikasari Karlini Karlini Kiky C SEMBIRING Kiky C. Sembiring Kurnia Putri Leo Saputra Maria Dewi Astuti Muhammad Agus Muljanto Muhammad Iqbal Pratama Mustari, Ikhsan Nana Widyastuti Ninis Hadi Haryanti, Ninis Hadi Nobuyuki Ichikuni Nur Firda Trianda Nurfitriani, Anggita Paradilla Catur Wulabdari Paradilla Catur Wulandari Pathur Razi Ansyah Puput Nopitasari Radhina Oktari Rahmat Eko Sanjaya Rahmidah Ulfah R. Rahmida Ulfah Reda Ariyantie Ridhoni, Arif Risnu Aritofa Sadang Husain Sadang Husain Sadang Husain Sadang Husain Sadang Husain Sepfina Monica Hutasoit Shimazu Shogo Shogo Shimazu Shogo Shimazu Suarso, Eka Sudarningsih Sudarningsih Sulfi Adam Sunardi, Ph.D., Sunardi Suryajaya Suryajaya Susi Susi Sutomo Sutomo Sutomo Sutomo Sutomo Sutomo Syahrul Khairi Takayoshi Hara Takayoshi Hara Tantriati T. Tantriati Tetti Novalina Manik Triyono Triyono Triyono Triyono Umi Baroroh Lili Utami Uripto Trisno Santoso Uripto Trisno Santoso Uripto Trisno Santoso Wega Trisunaryanti Wega Trisunaryanti Wega Trisunaryanti