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All Journal Reaktor Jurnal Teknik ITS IPTEK Journal of Proceedings Series Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Indonesian Journal of Chemistry Walisongo Journal of Chemistry REACTOR : Journal of Research On Chemistry And Engineering Sewagati Bulletin of Chemical Reaction Engineering & Catalysis
Danawati Hari Prajitno
Departemen Teknik Kimia Industri Institut Teknologi Sepuluh Nopember Surabaya
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Bio-kerosene and Bio-gasoil from Coconut Oils via Hydrocracking Process over Ni-Fe/HZSM-5 Catalyst Muhammad Al-Muttaqii; Firman Kurniawansyah; Danawati Hari Prajitno; Achmad Roesyadi
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (931.372 KB) | DOI: 10.9767/bcrec.14.2.2669.309-319

Abstract

In this study, hydrocracking of coconut oil over Ni-Fe/HZSM-5 catalyst was carried out in a batch reactor under different reaction temperature. Coconut oil is proposed as one of the potential feedstock for biofuel production. The Ni-Fe/HZSM-5 catalyst was prepared by incipient wetness impregnation method. The characterization of Ni-Fe/HZSM-5 catalyst by X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDAX), and Brunauer-Emmett-Teller (BET). The chemical composition of biofuel was analyzed by Gas-Chromatography-Mass Spectrometry (GC-MS). The results from the GC-MS analysis showed that the hydrocracking reaction over 10 % (Ni-Fe)/HZSM-5 catalyst at temperature of 375 oC obtained the highest hydrocarbon content (contained 49.4% n-paraffin, 26.93 % isoparaffin, 3.58 % olefin) and the highest yield of bio-gasoil 38.6 % in the biofuel liquid hydrocarbon. Pentadecane (n-C15) and heptadecane (n-C17) were the most abundant hydrocarbon compounds in biofuel liquid hydrocarbon. Decarboxylation and/or decarbonylation was the dominant reaction pathways in this process. Based on the result, the reaction temperature had a significant effect on the distribution of biofuel composition and yield of biofuel from coconut oil.
Hydrocracking of Cerbera manghas Oil with Co-Ni/HZSM-5 as Double Promoted Catalyst Lenny Marlinda; Muhammad Al-Muttaqii; Ignatius Gunardi; Achmad Roesyadi; Danawati Hari Prajitno
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 2 Year 2017 (August 2017)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (641.609 KB) | DOI: 10.9767/bcrec.12.2.496.167-184

Abstract

The effect of various reaction temperature on the hydrocracking of Cerbera manghas oil to produce a paraffin-rich mixture of hydrocarbons with Co-Ni/HZSM-5 as doubled promoted catalyst were studied. The Co-Ni/HZSM-5 catalyst with various metal loading and metal ratio was prepared by incipient wetness impregnation. The catalysts were characterized by XRD, AAS, and N2 adsorption-desorption. Surface area, pore diameter, and pore volume of catalysts decreased with the increasing of metals loading. The hydrocracking process was conducted under hydrogen initial pressure in batch reactor equipped with a mechanical stirrer. The reaction was carried out at a temperature of 300-375 oC for 2 h.  Depending on the experimental condition, the reaction pressure changed between 10 bar and 15 bar.   Several parameters were used to evaluate biofuel produced, including oxygen removal, hydrocarbon composition and gasoline/kerosene/diesel yields. Biofuel was analyzed by Fourier Transform Infrared Spectroscopic (FTIR) and gas chromatography-mass spectrometry (GC-MS). The composition of hydrocarbon compounds in liquid products was similar to the compounds in the gasoil sold in unit of Pertamina Gas Stations, namely pentadecane, hexadecane, heptadecane, octadecane, and nonadecane with different amounts for each biofuel produced at different reaction temperatures. However, isoparaffin compounds were not formed at all operating conditions. Pentadecane (n-C15) and heptadecane (n-C17) were the most abundant composition in gasoil when Co-Ni/HZSM-5 catalyst was used. Cerbera Manghas oil can be recommended as the source of non-edible vegetable oil to produce gasoil as an environmentally friendly transportation fuel. 
Hydrocracking of Non-edible Vegetable Oils with Co-Ni/HZSM-5 Catalyst to Gasoil Containing Aromatics Danawati Hari Prajitno; Achmad Roesyadi; Muhammad Al-Muttaqii; Lenny Marlinda
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 3 Year 2017 (December 2017)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.117 KB) | DOI: 10.9767/bcrec.12.3.799.318-328

Abstract

Biofuel has been considered as one of the environmentally friendly energy sources to substitute fossil fuel derived from non-edible vegetable oil. This research aims to investigate the effect of the non-edible vegetable oil composition on a specific hydrocarbons distribution contained in biofuel and the aromatics formation through hydrocracking reaction with the Co-Ni/HZSM-5 catalyst. The formation of aromatics from non-edible vegetable oils, such as: Cerbera manghas, rubber seed, and sunan candlenut oils, containing saturated, mono- and polyunsaturated fatty acids is presented. The hydrocracking reaction was carried out in a pressure batch reactor, a reaction temperature of 350 oC for 2 h, reactor pressure of 15 bar after flowing H2 for 1 hour, and a catalyst/oil ratio of 1 g/200 mL. Liquid hydrocarbon product was analyzed by gas chromatography-mass spectrometry. Based on the GC-MS analysis, hydrocracking on three different oils indicated that polyunsaturated fatty acids were required to produce relatively high aromatics content. The sunan candlenut oil can be converted to gasoil range hydrocarbons containing a small amount of aromatic through hydrocracking reaction. Meanwhile, the aromatics in liquid product from hydrocracking of Cerbera manghas and rubber seed oils were not found. 
Hydrocracking of Coconut Oil over Ni-Fe/HZSM-5 Catalyst to Produce Hydrocarbon Biofuel Muhammad Al-Muttaqii; Firman Kurniawansyah; Danawati Hari Prajitno; Achmad Roesyadi
Indonesian Journal of Chemistry Vol 19, No 2 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (259.955 KB) | DOI: 10.22146/ijc.33590

Abstract

This present study was aimed to investigate the hydrocracking of coconut oil using Ni-Fe/HZSM-5 catalyst in a batch reactor at three reaction temperatures (350, 375, and 400 °C). The Ni-Fe/HZSM-5 catalyst was prepared by using incipient wetness impregnation. The Ni-Fe/HZSM-5 catalyst was characterized using XRD, BET, and SEM-EDX. From XRD results, the loading of Ni and Fe did not change the crystalline structure of HZSM-5 catalyst. The surface area of HZSM-5 was 425 m2/g and decreased after the addition of metals (Ni and Fe) into HZSM-5 support. These changes implied that Ni and Fe particles were successfully dispersed on the HZSM-5 surface and incorporated into HZSM-5 pore. The product of hydrocarbon biofuel was analyzed using GC-MS. The GC-MS results of hydrocarbon biofuel showed the highest compounds for n-paraffin and yield for gasoil was 39.24 and 18.4% at a temperature of 400 °C, respectively. The reaction temperature affected the yield and the composition of hydrocarbon biofuel. At this reaction temperature condition, decarboxylation and decarbonylation were favored; lead to the formation of n-alkanes with an odd number of carbon atoms chain length.
Produksi Biofuel Berbantuan Ultrasonik dari Minyak Kelapa Terkatalisis Ca/γ-Al2O3 dan K/γ-Al2O3 Eko Supriadi; Rahmat Basuki; Danawati Hadi Prajitno; Mahfud Mahfud
Walisongo Journal of Chemistry Vol 4, No 1 (2021): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v4i1.7861

Abstract

Penelitian ini bertujuan untuk membandingkan doping Kalium (K) dan Kalsium (Ca) pada support γ-Al2O3 dalam produksi biofuel yang berbentuk fatty acid methyl ester (FAME) melalui reaksi transesterifikasi minyak kelapa berbantuan ultrasonik. Reaksi dilakukan dalam tipe reaktor batch dengan perbandingan mol minyak kelapa:etanol = 1:9, dan variasi konsentrasi berat katalis untuk masing-masing katalis K/γ-Al2O­3 dan Ca/γ-Al2O3 terhadap minyak kelapa (0,5%; 1,0%; 1,5%; 2% dan 2,5%), waktu reaksi (30, 60, 90, 120 dan 150 detik), dan frekuensi ultrasonik (20 dan 40 KHz). Keberhasilan doping ditunjukkan pada hasil karakterisasi K/g-Al2O3 ­dan Ca/g-Al2O3 menggunakan X-Ray Diffraction (XRD) yang menghasilkan puncak 2θ karakteristik K (29,70° dan 32,65°) dan Ca (25,35°, 26,77°, dan 27,17°) pada support g-Al2O3 (37,66°, 45,82° dan 67,22°). Karakterisasi menggunakan Surface Area Analyzer (SAA) menunjukkan bahwa katalis K/g-Al2O3 memiliki luas permukaan yang lebih kecil (34,03 m2/g) dibanding Ca/g-Al2O3 (83,77 m2/g), namun diameter pori yang lebih besar (66,12 Å) dibanding Ca/g-Al2O3 (35,22 Å). Katalis K/g-Al2O3 menghasilkan yield FAME yang lebih besar (93,19%) dibanding Ca/γ-Al2O3 (29,76%) pada konsentrasi katalis 2,5%, waktu reaksi 150 detik dan frekuensi ultrasonik 40 kHz. Kualitas FAME terkatalisis K/g-Al2O3 yang dihasilkan memenuhi empat parameter uji: densitas, viskositas kinematic, titik nyala, dan titik tuang sesuai dengan standar SNI 04-7182-2006.
Pelatihan Peningkatan Kompetensi Guru-Guru SMK Jurusan Keteknik Kimiaan Se-Jawa Timur dalam Bidang Pengolahan Limbah Cair Saidah Altway; Karenina Anisya Pratiwi; Mochammad Zayyan Difa Fadhillah; Daril Ridho Zuchrillah; Soeprijanto; Elly Agustiani; Danawati Hari Prajitno; Agus Surono; Lily Pudjiastuti; Orchidea Rachmaniah
Sewagati Vol 5 No 1 (2021)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1243.612 KB)

Abstract

Tujuan dari pengabdian masyarakat ini yaitu peningkatan kemampuan Guru Pengajar jurusan Keteknik Kimiaan se-Jawa Timur dalam bidang pengolahan limbah cair untuk mendukung kegiatan belajar-mengajar dalam bidang teknik kimia. Workshop ini dimaksudkan untuk memberi bekal mendasar dengan memberikan pemahaman ilmu dan perhitungan terkait bidang keteknikkimiaan sehingga menjadi acuan saat melakukan praktek dan meningkatkan kemampuan secara praktikal. Hal ini diharapkan dapat mendukung merealisasikan misi SMK jurusan Keteknik Kimiaan di Jawa Timur untuk menghasilkan tenaga kerja yang profesional sesuai dengan tuntutan dunia usaha/industri. Kegiatan peningkatan kemampuan sumber daya guru pengajar teknik kimia di SMK Jawa Timur tidak bisa dilakukan sekaligus atau bahkan hanya beberapa jam atau beberapa hari saja, namun kegiatan tersebut harus diberikan secara mendasar, bertahap dan terencana. Pada tahap ini, sesuai dengan pembicaraan dan kesepakatan dengan pihak mitra yang merupakan pengguna langsung kegiatan ini, peningkatan kemampuan yang diberikan berupa Pendalaman Teori dan Praktek Pengolahan Limbah Cair. Program pelatihan guru-guru jurusan Keteknik Kimiaan dilakukan dalam bentuk Daring sebagai bentuk pengabdian kepada masyarakat yang dilakukan oleh dosen-dosen Departemen Teknik Kimia Industri Fakultas Vokasi –ITS dengan total jam pelatihan adalah 32 jam, mengingat kondisi pandemi Covid-19 saat ini yang tidak memungkinkan untuk mengadakan pelatihan secara tatap muka (offline/Luring).
Pelatihan Peningkatan Kompetensi Guru-Guru SMK Jurusan Keteknik Kimiaan se-Jawa Timur dalam Bidang Unit Operasi Ektraksi Lailatul Qomariyah; Daril Ridho Zuchrillah; Saidah Altway; Danawati Hari Prajitno; Agus Surono; Orchidea Rachmaniah; Irfan Ramadhitya; Ahmad Nezard Dhiaulhaq
Sewagati Vol 7 No 5 (2023)
Publisher : Pusat Publikasi ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j26139960.v7i5.566

Abstract

Guru sebagai tenaga pendidik memiliki kompetensi pedagogi dan profesional dalam menjalankan tugasnya, Guru Sekolah Menengah Kejuruan (SMK) jurusan keteknik kimiaan diharapkan dapat mengembangakn strategi pembelajaran untuk meningkatkan kompetensi profesionalnya. Namun banyak guru SMK jurusan keteknik kimiaan memiliki latar belakang pendidikan keguruan atau sains murni, sehingga kompetensi yang dimiliki belum paripurna. Oleh karena itu, tim pengabdian kepada masyarakat yang terdiri dari dosen Departemen Teknik Kimia Industri dan Teknik Kimia, serta tenaga praktisi dari Industri melaksanakan kegiatan berupa pelatihan peningkatan kompetensi guru-guru SMK jurusan Keteknik Kimiaan se-Jawa Timur bidang unit operasi ekstraksi. Kegiatan pelatihan tersebut telah dilaksanakan secara daring pada tanggal 8 September hingga 24 November 2021 menggunakan aplikasi Zoom. Peserta pelatihan mencapai 120 peserta dengan 35 SMK yang terdaftar. Peserta mengalami kenaikan kompetensi setelah mengikuti pelatihan daring dengan pemateri dari tim dosen Departemen Teknik Kimia Industri dan juga membuat laporan praktikum yang telah disedikan. Metode yang digunakan salah satunya adalah tugas aktualisasi berupa membuat video best practice praktikum ekstraksi sederhana dengan bahan yang ada di sekitar lingkungan sekolah masing-masing, terdapat 24 video yang dapat ditonton di Youtube channel Departemen Teknik Kimia Industri ITS.
Hydrocracking of Non-edible Vegetable Oils with Co-Ni/HZSM-5 Catalyst to Gasoil Containing Aromatics Danawati Hari Prajitno; Achmad Roesyadi; Muhammad Al-Muttaqii; Lenny Marlinda
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 3 Year 2017 (December 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.12.3.799.318-328

Abstract

Biofuel has been considered as one of the environmentally friendly energy sources to substitute fossil fuel derived from non-edible vegetable oil. This research aims to investigate the effect of the non-edible vegetable oil composition on a specific hydrocarbons distribution contained in biofuel and the aromatics formation through hydrocracking reaction with the Co-Ni/HZSM-5 catalyst. The formation of aromatics from non-edible vegetable oils, such as: Cerbera manghas, rubber seed, and sunan candlenut oils, containing saturated, mono- and polyunsaturated fatty acids is presented. The hydrocracking reaction was carried out in a pressure batch reactor, a reaction temperature of 350 oC for 2 h, reactor pressure of 15 bar after flowing H2 for 1 hour, and a catalyst/oil ratio of 1 g/200 mL. Liquid hydrocarbon product was analyzed by gas chromatography-mass spectrometry. Based on the GC-MS analysis, hydrocracking on three different oils indicated that polyunsaturated fatty acids were required to produce relatively high aromatics content. The sunan candlenut oil can be converted to gasoil range hydrocarbons containing a small amount of aromatic through hydrocracking reaction. Meanwhile, the aromatics in liquid product from hydrocracking of Cerbera manghas and rubber seed oils were not found. 
Zn-Mo/HZSM-5 Catalyst for Gasoil Range Hydrocarbon Production by Catalytic Hydrocracking of Ceiba pentandra oil Yustia Wulandari Mirzayanti; Firman Kurniawansyah; Danawati Hari Prayitno; Achmad Roesyadi
Bulletin of Chemical Reaction Engineering & Catalysis 2018: BCREC Volume 13 Issue 1 Year 2018 (April 2018)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.13.1.1508.136-143

Abstract

Biofuel from vegetable oil becomes one of the most suitable and logical alternatives to replace fossil fuel. The research focused on various metal ratio Zinc/Molybdenum/HZSM-5 (Zn-Mo/HZSM-5) catalyst to produce liquid hydrocarbon via catalytic hydrocracking of Ceiba penandra oil. The catalytic hydrocracking process has been applied in this study to crack Ceiba pentandra oil into a gasoil range hydrocarbon using Zn-Mo/HZSM-5 as a catalyst. The effect of various reaction temperature on the catalytic hydrocracking of Ceiba pentandra oil were studied. The Zn-Mo/HZSM-5 catalyst with metal ratio was prepared by incipient wetness impregnation method. This process used slurry pressure batch reactor with a mechanical stirrer. A series of experiments were carried out in the temperature range from 300-400 oC for 2 h at pressure between 10-15 bar. The conversion and selectivity were estimated. The liquid hydrocarbon product were identified to gasoline, kerosene, and gas oil. The results show that the use of Zn-Mo/HZSM-5 can produce gas oil as the most component in the product. Overall, the highest conversion and selectivity of gas oil range hydrocarbon was obtained when the ZnMo/HZSM-5 metal ratio was Zn(2.86 wt.%)-Mo(5.32 wt.%)/HZSM-5 and the name is Zn-Mo/HZSM-5_102. The highest conversion was obtained at 63.31 % and n-paraffin (gas oil range) selectivity was obtained at 90.75 % at a temperature of 400 oC. Ceiba pentandra oil can be recommended as the source of inedible vegetable oil to produce gasoil as an environmentally friendly transportation fuel. 
Bio-kerosene and Bio-gasoil from Coconut Oils via Hydrocracking Process over Ni-Fe/HZSM-5 Catalyst Muhammad Al-Muttaqii; Firman Kurniawansyah; Danawati Hari Prajitno; Achmad Roesyadi
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.2.2669.309-319

Abstract

In this study, hydrocracking of coconut oil over Ni-Fe/HZSM-5 catalyst was carried out in a batch reactor under different reaction temperature. Coconut oil is proposed as one of the potential feedstock for biofuel production. The Ni-Fe/HZSM-5 catalyst was prepared by incipient wetness impregnation method. The characterization of Ni-Fe/HZSM-5 catalyst by X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray (SEM-EDAX), and Brunauer-Emmett-Teller (BET). The chemical composition of biofuel was analyzed by Gas-Chromatography-Mass Spectrometry (GC-MS). The results from the GC-MS analysis showed that the hydrocracking reaction over 10 % (Ni-Fe)/HZSM-5 catalyst at temperature of 375 oC obtained the highest hydrocarbon content (contained 49.4% n-paraffin, 26.93 % isoparaffin, 3.58 % olefin) and the highest yield of bio-gasoil 38.6 % in the biofuel liquid hydrocarbon. Pentadecane (n-C15) and heptadecane (n-C17) were the most abundant hydrocarbon compounds in biofuel liquid hydrocarbon. Decarboxylation and/or decarbonylation was the dominant reaction pathways in this process. Based on the result, the reaction temperature had a significant effect on the distribution of biofuel composition and yield of biofuel from coconut oil.
Co-Authors Achmad Roesyadi Adi Soeprijanto Agus Budianto Agus Surono Agustiani, Elly Ahmad Nezard Dhiaulhaq Altway, Saidah Eko Supriadi Firman Kurniawansyah Hafshah Hafshah Hafshah Hafshah Ignatius Gunardi Irfan Ramadhitya Karenina Anisya Pratiwi Karenina Anisya Pratiwi Kusno Budhikarjono Lailatul Qomariyah Lenny Marlinda Lily Pudjiastuti, Lily Mahfud Mahfud Mahfud Mahfud Mochammad Zayyan Difa Fadhillah Mochammad Zayyan Difa Fadhillah Muhammad Al Muttaqii Muhammad Al Muttaqii Muhammad Al-Muttaqii Muhammad Al-Muttaqii Muhammad Al-Muttaqii Muhammad Al-Muttaqii Muhammad Iqbal N Nurjannah, N Nurjannah Ngatijo Ngatijo Nurjannah Nurjannah Nurjannah Nurjannah Rachmaniah, Orchidea Rahmat Basuki Ratna Ediati Santi Dyah Savitri Tillotama Anindita Sari Victor Purnomo Yustia Wulandari Mirzayanti Zuchrillah, Daril Ridho