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Dimas Hokka Pratama Soebekti
Abstrak :
[ABSTRAK
Jakarta adalah kota terbesar di Indonesia. Sebagai kota terbesar di Indonesia, Jakarta juga memiliki populasi yang sangat besar, yang diimbangi oleh majunya ekonomi Jakarta. Sebagai imbas populasi dan pertumbuhan ekonomi, permasalahan pengelolaan limbah padat adalah salah satu permasalahan dasar kota Jakarta. Penelitian ini memiliki tujuan untuk menganalisis keberlanjutan pengelolaan limbah padat di Jakarta dengan mengukur ekoefisiensinya, serta menganalisis keberlanjutan metode hydrocracking sebagai cara pengolahan limbah padat perkotaan, khususnya di Jakarta. Pada sistem pengelolaan terkini, ditemukan bahwa pengelolaan limbah padat di Jakarta tidak berlanjut (Ekoefisiensi pada tahun 2013, sebesar 0,52 lebih kecil dari 1). Oleh sebab itu diperlukan intervensi berupa proses hydrocracking (Ekoefisiensi proses sebesar 1,775) agar pengelolaan limbah padat di Jakarta berlanjut. Skenario intervensi hydrocracking baru akan berlanjut apabila limbah padat di Jakarta telah dipilah sebesar 50% dan limbah padat organik diproses melalui hydrocracking sebesar 30%.
ABSTRACT Jakarta is the biggest city in Indonesia. As such, it is densely populated, and has a major economic activity. These two factors contribute towards the current solid waste management issues in Jakarta. This paper aims to analyze the sustainability of existing municipal solid waste by measuring its ecoefficiency, and to analyze the sustainability of hydrocracking method as a means of municipal solid waste treatment. In the existing condition, We find that Jakarta?s municipal solid waste management system is not sustainable (In 2013, the ecoefficiency was measured at 0,52 which is less than 1). Therefore, based on this finding we find it to be necessary to do an intervention. In this paper, the intervention was introduced in the form of hydrocracking process. As a process we find hydrocracking to be a sustainable process (ecoefficiency of the process is measured at 1,775). However, the intervention scenario will only be sustainable, once 50% of the solid waste of sorted, and if hydrocracking method treats 30% of this fraction;Jakarta is the biggest city in Indonesia. As such, it is densely populated, and has a major economic activity. These two factors contribute towards the current solid waste management issues in Jakarta. This paper aims to analyze the sustainability of existing municipal solid waste by measuring its ecoefficiency, and to analyze the sustainability of hydrocracking method as a means of municipal solid waste treatment. In the existing condition, We find that Jakarta?s municipal solid waste management system is not sustainable (In 2013, the ecoefficiency was measured at 0,52 which is less than 1). Therefore, based on this finding we find it to be necessary to do an intervention. In this paper, the intervention was introduced in the form of hydrocracking process. As a process we find hydrocracking to be a sustainable process (ecoefficiency of the process is measured at 1,775). However, the intervention scenario will only be sustainable, once 50% of the solid waste of sorted, and if hydrocracking method treats 30% of this fraction, Jakarta is the biggest city in Indonesia. As such, it is densely populated, and has a major economic activity. These two factors contribute towards the current solid waste management issues in Jakarta. This paper aims to analyze the sustainability of existing municipal solid waste by measuring its ecoefficiency, and to analyze the sustainability of hydrocracking method as a means of municipal solid waste treatment. In the existing condition, We find that Jakarta’s municipal solid waste management system is not sustainable (In 2013, the ecoefficiency was measured at 0,52 which is less than 1). Therefore, based on this finding we find it to be necessary to do an intervention. In this paper, the intervention was introduced in the form of hydrocracking process. As a process we find hydrocracking to be a sustainable process (ecoefficiency of the process is measured at 1,775). However, the intervention scenario will only be sustainable, once 50% of the solid waste of sorted, and if hydrocracking method treats 30% of this fraction]
2015
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Handrianto Wijaya
Abstrak :
Perkembangan bahan bakar terbarukan dari biomassa sangat pesat, dan menjadi alternatif utamauntuk menggantikan bahan bakar yang berasal dari minyak bumi yang jumlahnya terbatas. Salah satu prosesdalam produksi bahah bakar terbarukan ini adalah hydrocracking. Percobaan ini bertujuan untukmempelajari pengaruh tekanan dan suhu dalam proses hydrocracking dengan metode Analytical SemiEmpirical Model ASEM dalam merepresentasikan yield produk. Model matematis dimodifikasi dandivalidasi dengan menggunakan data-data dari penelitian yang sudah ada. Hasil penelitian menunjukkan bahwa Analytical Semi Empirical Model ASEM dapat digunakan untuk memprediksi yield produk hasilhydrocracking dengan tingkat ketelitian tinggi. Hal ini ditunjukkan oleh parameter statistik R2 yangmemiliki nilai diatas 0.95 dan SSE yang memiliki nilai di bawah 3. Penelitian ini juga menghasilkanpersamaan yang dapat digunakan untuk proses cracking secara umum. ......The development of renewable fuels from biomass is very rapid, and becomes the main alternativeto replace petroleum derived fuels that are limited in stock. One of the processes in the production of thisrenewable fuel is hydrocracking. This experiment aims to study the effect of pressure and temperature inthe hydrocracking process using the Analytical Semi Empirical Model ASEM method in representing theyield of the product. Mathematical model is modified and validated using data from existing research. The results show that Analytical Semi Empirical Model can be used to predict the yield of product fromhydrocracking, with all of the models show R2 higher than 0.95 and SSE lower than 3. This experimentalso produces an equation that can be used to predict the yield of product from various cracking process ingeneral.
Depok: Fakultas Teknik Universitas Indonesia, 2018
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UI - Skripsi Membership  Universitas Indonesia Library
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Sepehr Sadighi
Abstrak :
In this research, based on actual data gathered from an industrial scale vacuum gas oil (VGO) hydrocracker and artificial neural network (ANN) method, a model is proposed to simulate yields of products including light gases, liquefied petroleum gas (LPG), light naphtha, heavy naphtha, kerosene, diesel and unconverted oil (off-test). The input layer of the ANN model consists of the catalyst, feed and recycle flow rates, and bed temperatures, while the output neurons are yields of those products. The results showed that the AAD% (average absolute deviation) of the developed ANN model for training, testing, and validating data are 0.445%, 1.131% and 0.755%, respectively. Then, by considering all operational constraints, the results confirmed that the decision variables (i.e., recycle rate and bed temperatures) generated by the optimization approach can enhance the gross profit of the hydrocracking process to more than $0.81 million annually, which is significant for the economy of the target refinery.
Depok: Faculty of Engineering, Universitas Indonesia, 2018
UI-IJTECH 9:1 (2018)
Artikel Jurnal  Universitas Indonesia Library
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Andrey Sapati Wirya
Abstrak :
ABSTRAK
Penelitian ini bertujuan untuk memperoleh model hydrocracking dalam trickle bed reactor untuk produksi green fuel menggunakan katalis Ni-W berpenyangga silika alumina, mendapatkan ukuran reaktor trickle bed untuk perpindahan panas yang baik dan mencari kondisi optimum untuk tingkat kemurnian tinggi. Penelitian diawali dengan studi pustaka tentang green fuel, kinetika hydrocracking, trickle bed reactor dan pemodelan. Kemudian model ditentukan dan dikembangkan untuk dilakukan simulasi serta diverifikasi untuk menguji konvergensi. Hasil simulasi dianalisis secara teknis untuk mendapatkan kondisi optimum dengan kemurnian yang tinggi. Dari hasil simulasi didapatkan bahwa kemurnian produk diesel mencapai 44,22 pada temperatur 420 0C. Produk kerosin dapat mencapai kemurnian sebesar 21,39 pada temperatur 500 0C. Produk nafta dapat mencapai kemurnian sebesar 25,30 pada temperatur 500 0C. hr> ABSTRAK
The purposes of this research are to get hydrocracking model in trickle bed reactor to produce green fuel using Ni W supported alumina silica catalyst, to determine the size of trickle bed reactor which provide good heat transfer, and to get optimum condition for high purity product. The research is initiated by literature study of green fuel, hydrocracking kinetics, trickle bed reactor, and basic of modeling. The model is determined and developed to perform simulation under different conditions. Model is verified to check the convergence. Simulation results are analyzed technically to achieve optimum condition with high product purity. Simulation results show that the diesel product purity is 44.22 at 420 0C. The Kerosene product could achieve purity of 21.39 at 500 0C. The naphta product could achieve purity of 25.30 at 500 0C.
2017
S68050
UI - Skripsi Membership  Universitas Indonesia Library
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Rizka Thalita Adevia
Abstrak :
ABSTRAK
Reaktor slurry bubble column untuk memproduksi green fuelmelalui hydrocracking minyak nabati dengan katalis Ni-W/SiO2-Al2O3 disimulasikan di dalam penelitian ini dengan tujuan untuk mendapatkan model reaktor dan kondisi operasi optimum. Reaktor slurry bubble column dua dimensi aksisimetri dengan diameter 2,68 m dan tinggi 7,14 m dimodelkan dengan mempertimbangkan perpindahan massa dan panas. Fasa gas dan cair mangalir ke atas, menahan, dan mengagitasi partikel katalis berbentuk bola dengan diameter 100 m di dalam reaktor. Reaktor beroperasi pada tekanan 80 bar dan temperatur 420 C. Trigliserida sebanyak 5 w/w di dalam dodekana diumpankan sebagai fasa cair, dan hidrogen sebanyak 105,5 mol hidrogen/trigliserida diumpankan sebagai fasa gas. Kecepatan gas masuk adalah 0,01 m/s. Pemodelan dan simulasi pada penilitian ini juga mempertimbangkan penurunan tekanan dan distribusi konsentrasi katalis di dalam reaktor. Hasil simulasi kasus dasar menunjukkan konversi trigliserida sebesar 99,26, yield produk sebesar 40,68, dan kemurnian produk sebesar 45,55. Beberapa variasi parameter proses dilakukan untuk melihat pengaruhnya terhadap kinerja reaktor, sehingga kondisi optimum untuk memproduksi green fuel, yaitu diesel, kerosin, dan nafta, didapatkan.
ABSTRACT
A slurry bubble column reactor to produce green fuel through hydrocracking vegetable oil with Ni W SiO2 Al2O3catalyst was simulated in this research with objectives to obtain model of reactor and optimum operation condition. The two dimensional axis symmetric of a slurry bubble column reactor with diameter of 2.68 m and height of 7.14 m was modelled by considering mass and heat transfers. The gas and liquid phases flow upward, suspend, and agitate the spherical catalyst particles of 100 in diameter inside the reactor. The reactor operated under the pressure of 80 bar and the temperature of 420 C. Triglyceride of 5 w w in dodecane is fed as the liquid phase, and hydrogen of 105.5 mol hydrogen triglyceride is fed as the gas phase. The inlet gas velocity is 0.01 m s. Modelling and simulation in this research also considered pressure drop and loading catalyst distribution inside the reactor. Simulation results of base case show that the triglyceride conversion is 99.26, the product yield is 40.68 w w, and the product purity is 45.55 w w. Several variations of process parameters were performed to see the effect on the reactor performance, so optimum conditions for producing green fuel, such as diesel, kerosene, and naphtha, were obtained.
2018
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library