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All Journal VALENSI Reaktor JURNAL KIMIA SAINS DAN APLIKASI BAHASA DAN SASTRA Lingua Cultura Sinergi Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences JURNAL SELULOSA Jurnal Teknik ASEAN Journal of Chemical Engineering Jurnal Teknik Kimia Indonesia Warta Perkaretan Fikruna : Jurnal Ilmiah Kependidikan dan Kemasyarakatan Bulletin of Chemical Reaction Engineering & Catalysis Babakti : Journal of Community Engangement Babakti: Journal of Community Engangement

Herri Susanto

Chemical Engineering Department, Bandung Institute Of Technology

Author-ID : 395989

Religion Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Other

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Evaluasi Bejana Rebusan Horizontal dan Vertikal Berdasarkan Kehilangan Potensi Rendemen di Pabrik Kelapa Sawit Dennie Pohan; Herri Susanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Penyediaan Katalis Cu/ZnO/Al 2 O 3 untuk Katalis Sintesis-Langsung DME Suryanet Sari Dewi; Aisyah Ardy; Herri Susanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Direct synthesis of dimethyl eter (DME) using Cu-based catalyst was studied with varying amounts of Zn for methanol synthesis, and Al2O3 as a component for methanol dehydration. Catalyst was prepared using two methods, i.e. the sol gel co-precipitation and the co-precipitation. Mass ratio of (Cu + Zn) to Al2O3 was held constant of 2. The characterization test indicated that co-precipitation catalyst had a better mechanical strength than sol-gel catalyst.Characteristic analysis (BET, XRD, SEM, and AAS) and activity tests (at 220oC). The sol gel co-precipitation method consisted of a higher portion of crystals 61.1%, while the coprecipitation catalyst had 21.8% crystals.However,the solgelco-precipitation had the smallest surface area of the catalyst 47.8m^2/g, while the co-precipitation had 114 m2/g. From the results of SEM analysis showed that almost all of catalyst texture contained amorf (50-70%) than crystal (20-40%). Catalyst CZA1 contained many amorf (78.2%) than crystal (21.8%), and this is match from XRD analysis. The amount of ZnO contained in catalyst (from the analysis of AAS) is quite far away from the target, this is due to lack of time aging in metal forming ZnO. Aging 6 hours enough for formation of crystal ZnO, but give a smallest surface area (20.4 m^2 /g). Co-precipitation method with aging 2 hours tested its activity in the synthesis of DME varied the active phase and promoter. CZA2 provide the best catalyst activity in the test activation and catalytic reduction process. CO convertion was 16% by CZA2 catalyst at 220oC and 1 bar.

Influence of Impregnation and Coprecipitation Method in Preparation of Cu/ZnO Catalyst for Methanol Synthesis Yusi Prasetyaningsih; Hendriyana Hendriyana; Herri Susanto
Journal of Engineering and Technological Sciences Vol. 48 No. 4 (2016)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2016.48.4.6

Cu/ZnO catalyst was succesfully prepared using a coprecipitation method. The mixing procedure of the Cu(NO3)2, Zn(NO3)2 and Na2CO3 solutions had an important influence on the characteristics of the catalyst. The best catalyst obtained was the one prepared with slow mixing of the salt solutions and a CuO/ZnO molar ratio of 50:50. This raw catalyst had a maximum surface area of about 61.6 m2/g. Increasing the CuO/ZnO molar ratio caused an agglomeration of precipitated particles, reducing the surface area. A much better catalyst was obtained using an impregnation method, in which g-Al2O3 was used as support. The impregnated catalyst had a surface area of about 151 m2/g. Activity tests were carried out in a fixed-bed reactor containing 1 g of catalyst and a flow of syngas at a rate of 60 mL/min. The reaction temperature was 170°C and the pressure was 20 barg. The best coprecipitated catalyst gave a CO conversion of about 10%, while the impregnated catalyst gave a CO conversion of up to 69%.

ISOTHERMAL PYROLYSIS OF KRAFT PULP MILL SLUDGE Syamsudin Syamsudin; Herri Susanto; Subagjo Subagjo
Reaktor Volume 14, No. 4, OKTOBER 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Kraft pulp mill sludge cake composed of rejected wood fibers and activated sludge microorganisms. With a heating value about 14 MJ/kg (dried basis), this type of biomass had a potential as an alternative energy source. Unfortunately, it had an ash content of 27.6% and a moisture content of 80%. For reducing moisture content with minimum energy consumption, a combination of mechanical dewatering and thermal drying was studied previously. Meanwhile, experiments on isothermal pyrolysis had been carried out for further improvement on ultimate and proximate analysis of solid fuel. Final mass of char obtained from pyrolysis at 500oC was not significantly different from that of 700oC, so pyrolysis was considered to be optimum at 500oC. A char obtained from pyrolysis at temperature of 500oC had a pore surface area of 77.049 m2/g (highest among other temperatures). Kinetic of isothermal pyrolysis was well represented with a first order modified volumetric model with a frequency factor of 0.782 1/s and an activation of 34.050 kJ/mol.

PENGARUH KADAR KARBON PADA PROSES GASIFIKASI Abrar Riza; Yazid Bindar; Herri Susanto; Dwiwahdju Sasongko
SINERGI Vol 21, No 1 (2017)
Publisher : Universitas Mercu Buana

Investigasi proses gasifikasi dilakukan dengan pemodelan termodinamik. Kuantifikasi unjuk kerja proses gasifikasi dinyatakan dengan kadar H2 dan kadar CO dalam gas produser, temperatur dan efisiensi termal. Investigasi pengaruh kadar karbon terhadap unjuk kerja proses gasifikasi dilakukan dengan simulasi menggunakan batubara: lignit, bituminus dan antrasit. Ketiga jenis batubara diharapkan mewakili tingkatan kadar karbon. Kajian termodinamika digunakan sebagai piranti prediksi kinerja gasifikasi dan dapat melihat efek berbagai faktor secara cepat. Penyimpangan kinerja gasifier aktual terhadap hasil prediksi termodinamika sering ditemui dan biasanya dianggap sebagai akibat faktor-faktor teknis yang berhubungan dengan laju proses, misalnya pengontakan partikel dengan medium gasifikasi. Pada makalah ini, kajian termodinamika disempurnakan dengan melibatkan pemodelan dekomposisi batubara yang sangat tergantung pada jenis batubara dalam hal ini mewakili kadar karbon. Harapannya, pengabungan model dekomposisi batubara yang diusulkan dalam penelitian ini dan model kesetimbangan reaksi konvensional menghasilkan kajian termodinamika yang lebih rasional. Hasil dari kajian termodinamika digunakan sebagai piranti prediksi kinerja gasifikasi dengan mempertimbangkan kadar karbon batubara. Fraksi mol gas hidrogen maksimum yang dihasilkan lignit lebih tinggi daripada antrasit dan bituminus, berturut-turut 0,43 dan 0,25. Fraksi mol maksimum gas hidrogen dari lignit berada pada laju udara/batubara sekitar 1,2 kg/kg sedangkan antrasit dan bituminus berada pada sekitar 3 kg/kg. Temperatur proses gasifikasi, seperti diduga sangat dipengaruhi oleh jenis batubara. Sesuai dengan kadar H2, temperatur gasifikasi sebaiknya dijaga sekitar 1000 oC (Ru = 2,4 dan 4 berturut-turut untuk batubara lignit, antrasit dan bituminus). Keuntungan pada temperatur sekitar 1000 oC, tar secara praktis sudah terdekomposisi lebih lanjut, sehingga gas produser hanya sedikit mengandung tar.

Pengaruh 5% MgO pada CuO-ZnO-Al2O3 sebagai Katalis Bifungsi untuk Sintesis Langsung DME dari Syngas pada Tekanan 15 Bar Indah Retno Wulandary; Aisyah Ardy; Aslamiah Aslamiah; Edi Susanto; Herri Susanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2020: PROSIDING SNTKK 2020
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Simulasi Termodinamika Perengkahan Tar pada Keluaran Fixed Bed Gasifier Herri Susanto
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Gasification is process to convert solid fuel such as biomass to gaseous fuel. Gasification produces synthetic gas which can be used as fuel, or feedstock for chemical synthesis. Tar production is one of major problem in gasification. Tar can be reduced by steam reforming of producer gas and modification of gasifier’s configuration. Gasifier and tar catalytic cracking reactor configurations and operating conditions are studied by using equilibrium thermodynamic model for steam reforming process. Steam/tar mole ratio and operation temperature must be taken into consideration to minimize tar production and prevent coke formation in catalyst. Simulation result can give guidance about operating condition of steam tar cracking reactor and guidance for gasifier configuration to minimize tar production. Simulation results showed that in order to eliminate tar and prevent coke formation, tar cracking reactor minimum temperature of 500-700oC should be used for downdraft gasifier, 662-756oC for conventional updraft gasifier, and 648-715oC for modified downdraft gasifier depending on steam/tar ratio in tar cracking reactor feed.

Uji Pengoperasian Fixed Bed Gasifier Batubara Kapasitas 100 kg/jam Suhartono; Suwito Gunadarma; Dwiwahju Sasongko; Herri Susanto
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 6 No 1 (2007): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol6no1.263

Unit gasifikasi batubara jenis down draught kapasitas 100 kg/jam untuk mensubtitusi minyak bakar 70 liter/jam melalui proses gasifikasi, menggunakan udara-air sebagai medium penggasifikasi telah terinstalasi pada unit pengering di pabrik teh. Unit gasifiakasi terdiri dari reaktor gasifier, siklon, pendingin, kock out drum, blower dan burner. Gas produser stabil terbakar di burner, tetapi hanya mampu membuat udara panasdi unit pengering teh hingga 92oC (suhu target 100oC 120oC). Diperkirakan tidak tercapainya suhu target disebabkan kapasitas gasifier kurang besar, sehingga gas produser yang disuplai kurang dan pembakaran di burner selalu dalam ekses udara yang tinggi. Beberapa faktor gasifikasi yang diperkirakan mempengaruhi proses, antara lain: a. batubara pecah menjadi partikel lembut, menyebabkan penurunan tekanan yangmenghambataliran, hambatan aliran di ruang reduksi terjadi akibat pelelehan abu, menyebabkan penyumbatan aliran maupun penutupan arang, sehingga sulit bereaksi, c.kandungan tar masih banyak, karena tidak adanya scrubber yang dipasang di depan pendingin. Untuk menurunkan temperatur proses gasifikasi yang masih tinggi dan pelelehan abu diatasi dengan air yang disemburkan dalam bentuk kabut (spray) dalam daerah oksidasi melalui pemasangan pocker, penguapan air menyebabkan produksi hidrogen tinggi. Modifikasi lanjut difokuskan pada reaktor gasifikasi berupa perombakan throat (zona reduksi) untuk menurunkan temperatur proses dan meningkatkan pasokan gas hasil.

Thermodynamic study on vapour-liquid equilibrium of toluene and several types of oil as absorbent H Hendriyana; S Suhartono; Herri Susanto
Jurnal Teknik Kimia Indonesia Vol 10, No 1 (2011)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2011.10.1.3

Thermodynamic study on vapour-liquid equilibrium of toluene and several types of oil as absorbent Gas cleaning system is one of important step in the utilization of biomass via gasification process. The producer gas obtained from the gasification process must be very clean before it is used in an internal combustion engine. In order to gaseous fuel get cleaned with a tar content below 100 mg/Nm3, a gas cleaning system using scrubbing oil is being developed and taking the advantage of a lower vapour pressure of oil than scrubbing water. Study on vapour-liquid equilibrium is being conducted to understand the phenomena taking place in the absorption of tar with oil. In our present study, the producer gas containing tar is represented using air containing toluene. This producer gas model with a toluene or benzene concentration then bubbled with a rate of 27.6 mL/min into a bath of oil at a various temperature. The progress of absorption of tar model in oil measured gas chromatography until saturated condition. Considering that the concentration of toluene in the gas stream is very low, the toluene and oil vapour-liquid equilibrium follows the Henry’s law. Prediction of Henry’s constants is also carried out using UNIFAC-FV model which is known to be suitable for hydrocarbon gases and high-boiling point hydrocarbon solvent. Keywords: tar, oil, Henry’s constant AbstrakSistem pembersihan gas merupakan salah satu langkah penting dalam pemanfaatan biomassa melalui proses gasifikasi. Gas produser yang dihasilkan dari proses gasifikasi harus sangat bersih sebelum digunakan dalam mesin pembakaran internal. Untuk mendapatkan bahan bakar gas yang bersih dengan kandungan tar di bawah 100 mg/Nm3. Sebuah sistem pembersihan gas dengan menggunakan minyak sebagai media penyerap dikembangkan dengan mengambil keuntungan dari tekanan uap minyak lebih rendah air penyerap. Studi kesetimbangan uap-cair yang dilakukan untuk memahami fenomena yang terjadi dalam penyerapan tar dengan minyak. Dalam kami studi ini, gas produser yang mengandung direpresentasikan dengan udara yang mengandung toluena. Model gas produser ini dibuat dengan menggelembungkan konsentrasi benzena atau toluena dengan laju 27,6 mL/menit ke dalam bak minyak pada berbagai suhu. Kemajuan penyerapan model tar dalam minyak diukur dengan cromathograpy gas sampai dengan kondisi jenuh. Mengingat konsentrasi toluena dalam aliran gas sangat rendah, maka kesetimbangan uap-cair toluena dan minyak mengikuti hukum Henry. Konstanta Henry juga dapat diprediksi dengan menggunakan model UNIFAC-FV yang cocok untuk gas hidrokarbon dan pelarut hidrokarbon dengan titik didih tinggi. Kata kunci: tar, minyak, konstanta Henry

Pengukuran konstanta henry toluen dan benzen dalam minyak dan air dengan kolom gelembung S Suhartono; Herri Susanto; Dwiwahju Sasongko; Azis Trianto
Jurnal Teknik Kimia Indonesia Vol 9, No 2 (2010)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2010.9.2.2

Determination of Henry’s constant for toluene and benzene in oils and water were carried out in a bubbling bottle with diameter of 3 cm. Air containing toluene vapour or benzene vapour was bubbled through 50 mL absorbing liquid. The gas flow rate was 13.6 mL/min. By measuring the concentration of toluene or benzene in the inlet and outlet gas stream, we were able to calculate their concentrations in absorbing liquid. We found that the value of Henry’s constant of toluene in lubrication oil and palm oil at 30 oC were 155 and 145 respectively (H= CG/CL, with CG in mol/L and CL in mol/L). We also found that the absorption capacities were in the order (from the highest) of: lubrication oil, palm oil, and sunflower oil. Henry’s constant of toluene in water was at about 4 which was much lower than those of oils.Keyword: absorption, Henry’s constant, toluene, benzene, producer gas AbstrakPengukuran konstanta Henry sistem toluen dan benzen dalam minyak dan air dilakukan melalui percobaan absorpsi di dalam sebuah kolom gelembung dengan diameter 3 cm. Minyak sawit, minyak bunga matahari, minyak pelumas dan air digunakan sebagai absorben. Toluen dan benzen dipilih sebagai tar model. Gas model yang tersusun dari udara dan uap toluen atau benzen digelembungkan ke dalam absorben 50 mL. Absorpsi dilakukan pada suhu 30 dan 60 oC dan laju alir gas model 13,6 mL/min. Analisa dilakukan terhadap konsentrasi aliran gas model sebelum dan sesudah absorpsi. Analisa tersebut dilakukan dengan kromatografi gas Shimadzu GC-8APF. Konstanta Henry dihitung sebagai H=CG/CL dan H=P/CL. Nilai 1/H sistem toluen-minyak pelumas dan toluen-minyak sawit pada suhu 30 oC dan laju alir gas 13,6 mL/min berturut-turut adalah 155 dan 145 (untuk CG dalam mol/L dan CL dalam mol/L). Merujuk pada nilai-nilai konstanta Henry hasil percobaan, minyak pelumas dan minyak sawit merupakan cairan penyerap yang paling cocok untuk toluen dan benzen sebagai representasi tar dalam gas hasil gasifikasi. Urutan besarnya kapasitas absorpsi cairan penyerap terhadap toluen dan benzen adalah sebagai berikut (berturut-turut dari yang besar): minyak pelumas, minyak sawit, minyak bunga matahari dan air. Konstanta Henry toluen dalam air berada pada kisaran 4, yang menunjukkan bahwa kapasitas absorpsi toluen dalam air lebih rendah dibandingkan kapasitas absorpsi toluen dalam minyak.Kata Kunci: absorpsi, konstanta Henry, toluen, benzen, gas produser

Co-Authors ,, Syamsudin AA Sudharmawan, AA Abrar Riza Abrar Riza, Abrar Achmad Ali Syamsuriputra Agnes Veronica Victoria Agus Firmansyah Agus Firmansyah Aisyah Ardy Aisyah Ardy Aisyah Ardy Amry, Akhmad Ari Susandy Sanjaya, Ari Susandy Aslamiah Aslamiah Azis Trianto Benny Haryoso David Bahrin Dennie Pohan Dewi Agustina Iryani Dewi Kusuma Arti Diyah Fadjarwaty Dwi Hantoko Dwiwahdju Sasongko Dwiwahdju Sasongko, Dwiwahdju Dwiwahju Sasongko Dwiwahju Sasongko Dwiwahju Sasongko Edi Susanto Feerzet Achmad Fidyaningsih, Riastuti Frita Yuliati H Hendriyana Hendriyana Hendriyana Hendriyana, Hendriyana Hidayat, Ade Sholeh I.G.B Ngurah Makertihartha I.G.B.N. Makertihartha Idvan, Idvan Indah Retno Wulandary Indriasari, Indriasari Iskandar, M Soleh J Junaedi Jarwinda Jarwinda Jarwinda, Jarwinda Jenny Rizkiana Jenny Rizkiana Joko Waluyo Lienda Aliwarga Lienda Aliwarga Linda, Riska Sari Melia Laniwati Gunawan Mi Yan Muri Mukhrianto Nur Setianingrum Petric Marc Ruya Prasetyaningsih, Yusi Reynard Reynard Reynard Reynard Rizki Pramudiningtyas S Suhartono S Suhartono S Suhartono S. Subagjo Sari Farah Dina Satria, Arysca Wisnu Setianingrum, Nur Suhartono Sunu Herwi Pranolo Suryanet Sari Dewi Suwito Gunadarma Syamsudin Syamsudin Syamsudin Syamsudin Tobias Richards Tobias Richards Wahyu Tri Utami Wisojodharmo, Lies Yazid Bindar Yazid Bindar Yazid Bindar Yusi Prasetyaningsih

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