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Wenan Deng - One of the best experts on this subject based on the ideXlab platform.

  • exploratory investigation on the slurry phase Hydrocracking Reaction behavior of coal tar and petroleum based heavy oil mixed raw material
    Energy & Fuels, 2019
    Co-Authors: Tengfei Yang, Wenan Deng
    Abstract:

    A petroleum-based atmospheric residue from Merey (MRAR) and a medium-/low-temperature coal tar atmospheric residue (CTAR) were selected as raw materials and mixed in different proportions to form m...

  • stability change of asphaltene in the residue during slurry phase Hydrocracking
    Energy & Fuels, 2011
    Co-Authors: Wenan Deng
    Abstract:

    Asphaltenes play a key role in the stability of the residue during processing. When asphaltenes reach their solubility limit in the residue, they would begin to aggregate, so that a new phase, called the mesophase, would separate from the oil phase, which eventually leads to coke formation. To relate coking characteristics, the changes in stability of the residue were studied during a slurry-phased Hydrocracking Reaction. The results indicated that the coke formation is obviously restrained by H2 and a catalyst such that the coke induction period is prolonged and the coke content is also reduced significantly compared to the coke content only in the presence of H2. The colloidal stability parameters (CSPs) determined by means of flocculation onset titration and the colloidal stability function (CSF) calculated on the basis of saturate, aromatic, resin, and C7-asphaltene (SARA) composition of the residue have a similar variation trend, which could be related to coking characteristics. First, the coking ons...

  • effects of fe carbon black ni carbon black catalysts on Hydrocracking Reaction of residual oil
    Journal of Fuel Chemistry and Technology, 2007
    Co-Authors: L I Ming, Jiqian Wang, Wenan Deng, Guohe Que
    Abstract:

    Abstract The effects of the carrier carbon black on the interior hydrogen-transferring Reactions of residual oil were studied in a miniature batch reactor. The results indicated that carbon black could promote the hydrogen transfer from tetralin to anthracene. Fe/carbon black and Ni/carbon black catalysts were prepared using equal volume impregnation method and characterized by X-ray diffraction and scanning electron microscope. The results showed that metal sulfides were attached on the surface of carbon black. The average diameter of metal sulfide crystals was about 1 μm. The thermal Reactions of Karamay residual oil with carbon black, Fe/carbon black, or Ni/carbon black catalyst were carried out in a batch reactor in hydrogen atmosphere to investigate their effects which then were compared with those of traditional water-soluble dispersed catalysts. The Reaction temperature was 430°C and the catalyst content was 1wt%. It was found that on coke formation restricting, water-washed catalyst was better than unwashed catalyst, Ni/carbon black was better than Fe/carbon black, and Fe/carbon black was better than water-soluble dispersed catalyst. The fraction distribution analysis of products showed that Fe/carbon black could restrict the cracking and condensation of residue.

Eun Hee Kwon - One of the best experts on this subject based on the ideXlab platform.

  • change of physical properties with the slurry phase Hydrocracking Reaction of vacuum residue
    Journal of Industrial and Engineering Chemistry, 2021
    Co-Authors: Suk Hyun Lim, Eun Hee Kwon, Hai Hung Pham, Nam Sun Nho, Kwangho Kim, Jae Goo Lee, Sungyoul Park
    Abstract:

    Abstract The physical properties (density, kinematic viscosity, surface tension, and hydrogen solubility) and their correlations for a slurry-phase Hydrocracking Reaction were investigated with a vacuum residue (VR, as a feedstock) and hydrocracked products from VR conversion of 32.3%, 73.9% at different temperature and pressure conditions. As a result, the density, kinematic viscosity, and surface tension of the product decreased with converting VR, while the solubility of hydrogen increased. And the dependence of product properties on temperature showed to be similar to feedstock. Based on the measured data, the empirical correlations that can predict from VR to products were obtained with R-square of 0.9930 by modifying the existing correlations. From these properties change, it was confirmed that the Hydrocracking temperature and the degree of the Hydrocracking conversion of VR is the most dominant parameters to govern the change of physical properties. Finally, it was found that the mass transfer rate of hydrogen into oil is important because the hydrogen solubility (0.8 mol H2/kg feed or 0.16 wt.% on the feed weight at 160 bar, 410 ℃) on the liquid phase is much smaller than the chemical consumption of hydrogen (about 2–3 wt.% on the feed weight) for near full conversion of VR.

  • Hydrocracking and hydrotreating Reaction kinetics of heavy oil in cstr using a dispersed catalyst
    Journal of Petroleum Science and Engineering, 2021
    Co-Authors: Hung Hai Pham, Eun Hee Kwon, Suk Hyun Lim, Nam Sun Nho, Kwangho Kim, Woohyun Kim, Ryu Ho Jung, Youngil Lim, Dung Anh Pham
    Abstract:

    Abstract A kinetic model for the slurry-phase Hydrocracking of vacuum residue was proposed under conditions of: 410–450 °C, 0.25–1 hr−1, 160 bar, 1500 Nm3/m3 of H2 to oil ratio, and 500 ppm catalyst (Mo-octoate). A five-lump model with ten Reaction pathways was adopted to describe the Hydrocracking kinetics, while the hydrotreating Reactions were modeled by the power-law approach. The kinetic parameters were estimated considering the change in liquid density with Reaction time. The kinetic model predicted product yields and concentrations with an average error of less than 10%. As for the Hydrocracking Reaction, it was demonstrated that the secondary cracking of VGO mainly produced MD at high temperature and the high conversion of RES. As for hydrotreating, it was confirmed that asphaltene conversion proceeded to increase the removal level of other impurities. Finally, a hydrogen consumption rate model was proposed based on HCK and HDT, which provides consistent information for further uses in reactor modeling and process modeling.

  • Reaction characteristics and sediment formation of slurry phase Hydrocracking with vacuum residue in a bench scale bubble column reactor
    Journal of Petroleum Science and Engineering, 2021
    Co-Authors: Suk Hyun Lim, Eun Hee Kwon, Nam Sun Nho, Kwangho Kim, Yong Ku Kim, Jae Goo Lee
    Abstract:

    Abstract This study investigated the Hydrocracking Reaction performance of Mo-dispersed catalysts in relation to operating conditions in a bench scale slurry bubble column reactor. Experiments were performed at various temperatures (405–435 °C), LHSV (0.2–0.45 h − 1 ), superficial gas velocities (0.4–2.2 cm/s) and pressures (80–180 bar). As a result, it was found that the temperature and LHSV influenced the VR conversion, and the yield and properties of the product had a strong dependence on the VR conversion. And a reliable correlation between product yield, properties and VR conversion can be obtained using these relationships. In terms of the hydrogenation Reaction, the change of hydrogen pressure significantly affected the removal of impurities, with reduced sediments. Even with the dispersed catalysts, it was confirmed that the sediment content rapidly increased at a certain VR conversion (about 50–60 wt%) as similarly a heterogeneous catalyst was shown. Finally, it was found to keep the VR conversion below 60 wt% and the pressure above 120 bar for the stable operation of the slurry-phase Hydrocracking and sediment control.

  • investigation of asphaltene dispersion stability in slurry phase Hydrocracking Reaction
    Fuel, 2020
    Co-Authors: Kang Seok Go, Eun Hee Kwon
    Abstract:

    Abstract Asphaltene precipitation is known as a challenging issue to fully upgrade heavy oils. In this study, asphaltene dispersion stability and sediment formation for a slurry phase Hydrocracking Reaction of vacuum residue was investigated with changes of temperatures (405–435 °C), LHSV (0.20–0.45  h r - 1 ), pressures (80–180 bar) and superficial gas velocities (0.4–2.2 cm/s) in a bench-scale continuous system. The characteristics of dispersion stability were examined with the solubility parameters at the flocculation point (UV titration), the structure of the asphaltenes (H-NMR), and sediment content in the liquid product (Hot filtration). As results, it was found that the dispersion stability of asphaltene was mainly dependent on the VR conversion. In particular, at about 50% of the VR transition, the solubility was found to be unstable and the amount of deposition increased dramatically. At the same time, microscopic observation directly confirmed asphaltene flocculation. However, when H2 partial pressure was increased, the hydrogenation Reaction of asphaltene was promoted so that it could reduce sediment formation and improve both the asphaltene solubility and structure for the stable dispersion. On the other hand, increasing the superficial gas velocity did not give an effect on the asphaltene dispersion stability.

Kang Seok Go - One of the best experts on this subject based on the ideXlab platform.

  • investigation of asphaltene dispersion stability in slurry phase Hydrocracking Reaction
    Fuel, 2020
    Co-Authors: Kang Seok Go, Eun Hee Kwon
    Abstract:

    Abstract Asphaltene precipitation is known as a challenging issue to fully upgrade heavy oils. In this study, asphaltene dispersion stability and sediment formation for a slurry phase Hydrocracking Reaction of vacuum residue was investigated with changes of temperatures (405–435 °C), LHSV (0.20–0.45  h r - 1 ), pressures (80–180 bar) and superficial gas velocities (0.4–2.2 cm/s) in a bench-scale continuous system. The characteristics of dispersion stability were examined with the solubility parameters at the flocculation point (UV titration), the structure of the asphaltenes (H-NMR), and sediment content in the liquid product (Hot filtration). As results, it was found that the dispersion stability of asphaltene was mainly dependent on the VR conversion. In particular, at about 50% of the VR transition, the solubility was found to be unstable and the amount of deposition increased dramatically. At the same time, microscopic observation directly confirmed asphaltene flocculation. However, when H2 partial pressure was increased, the hydrogenation Reaction of asphaltene was promoted so that it could reduce sediment formation and improve both the asphaltene solubility and structure for the stable dispersion. On the other hand, increasing the superficial gas velocity did not give an effect on the asphaltene dispersion stability.

  • effect of Reaction temperature and time on the products and asphaltene dispersion stability in slurry phase Hydrocracking of vacuum residue
    Fuel, 2018
    Co-Authors: Kang Seok Go
    Abstract:

    Abstract The effect of Reaction temperature and time on the products and the asphaltene dispersion according to the residue conversion was investigated in a slurry-phase Hydrocracking Reaction. The experiments were carried out with two different approaches to control the Hydrocracking Reaction, which the Reaction time was changed from 4 h to 20 h (at 410 °C) and the Reaction temperature from 430 °C to 453 °C (for 1 h) at 100 bar (at 80 °C) of initial hydrogen pressure and 500 wt.ppm of molybdenum concentration. As a result, it was found that the control of the Reaction time and Reaction temperature may give different effect to the stability of the asphaltene in the liquid phase in spite of the same VR conversion. In order to understand this, the dipole moments of the liquid product and structural change of the asphaltene was compared. And it was found that enhancing hydrogenation Reaction by increasing Reaction time at low temperature delayed the time of decreasing point for dipole moments of the liquid phase and increased the length of alkyl chain of remaining asphaltene. Therefore, it is considered that the dispersibility of asphaltene with high polarity is increased. Additionally, it was found that enhancing hydrogenation can also improve the catalyst dispersion in the liquid phase below 80% of residue conversion.

Que Guohe - One of the best experts on this subject based on the ideXlab platform.

  • conversion and distribution of nitrogen containing compounds of liaohe atmospheric residue in slurry bed Hydrocracking
    Journal of Fuel Chemistry and Technology, 2013
    Co-Authors: Que Guohe
    Abstract:

    The transformation of nitrogen-containing compounds of Liaohe Atmospheric Residue(LHAR) during slurry-bed Hydrocracking was investigated using Fourier transform infrared spectroscopy(FT-IR) and gas chromatography-mass spectrometry(GC-MS).It was turned out that the major basic nitrogen containing compounds were quinoline in light VGO(350~400 ℃),while some part of pyridine and acridine existed as well.C1~5 carbazole and indole were dominating non-basic nitrogen containing compounds.For heavy VGO(400~450 ℃),the major nitrogen containing compounds were acridine and pyridine.After hydrogenation,the major basic nitrogen containing compounds of the light VGO became C1~7 quinoline,benzoquinoline,and C1~2 acridine,while the major non-basic nitrogen compounds were C2,C3 and C7 indole.For the heavy VGO,the major nitrogen containing compounds had become acridine and carbazole.The content of quinoline before and after the hydrogenation Reaction in the atmospheric residue fraction decreased with the elevation of boiling point.In addition,after hydrogenation the concentration of quinoline in LHAR had become higher.During the slurry bed Hydrocracking Reaction,the nitrogen-containing heterocyclic compounds were reduced and part of the non-basic nitrogen containing compounds was converted to basic nitrogen containing compounds.

  • mechanism of slurry phase Hydrocracking residue Reaction
    Acta Petrolei Sinica(Petroleum Processing Section), 2009
    Co-Authors: Que Guohe
    Abstract:

    In order to study the Reaction mechanism of slurry phase Hydrocracking,a slurry phase Hydrocracking Reaction was simulated in an autoclave,and the difference of the thermal-cracking Reaction under the presence of H2 of Liaohe heavy oil(LHHO) and the slurry phase Hydrocracking Reaction catalyzed by the oil-soluble dispersed Ni catalyst were investigated,also the compositions of gas products,the SEM images of coke and catalyst and the element analyses of cokes produced from the two Reactions were compared.The results showed that there was no difference between the compositions of gas products of the two Reactions,but the light oil yield of Hydrocracking Reaction decreased a little and its coke yield decreased more greatly,indicating that the slurry phase Hydrocracking Reaction was following the free radical thermal cracking mechanism.The action of disperser catalyst was only to promote the hydrogenation speed.The Ni content of slurry phase Hydrocracking coke was remarkable increased,which should be from the oil-soluble dispersed Ni catalyst.Thus it is concluded that the effect of catalyst in Reaction was to promote hydrogenation speed and to inhibit cracking Reaction and coke formation in the initial period,then the catalyst became the location of coke deposition,resulting in the formation of wall-phase coke decrease in the end period.

  • the slurry bed Hydrocracking Reaction of the coal tar and lungu heavy oil
    Journal of Liaoning University of Petroleum & Chemical Technology, 2007
    Co-Authors: Que Guohe
    Abstract:

    Co-processing Lungu heavy oil with a kind of coal-tar for preparing high yields purred fuel and high grade paving asphalt was investigated in a rhythmic high-pressure Reaction cauldron.The Reaction conditions are as follows: mass ratio of coal-tar to heavy oil is 1∶3,temperatures is 430 ℃,Reaction time is 60 min, initial pressure of hydrogen is 7.0 MPa in room temperature,catalyst content of 200 μg/g.The result shows that the presence of hydrogen and dispersed catalyst would effectively inhabit the coke-forming and gas producing,and increase the yield of middle fractions.According to coking forming,catalytic hydrogenation capability of Ni catalyst is better than that of Fe catalyst,and the oil-soluble catalyst NiNaph offers better catalytic hydrogenation capability than the water-soluble catalyst Ni(NO3)2.Different starting conditions of compositions will change the distribution of product.In the presence of separation-point 420~430 ℃,the residue of the Reaction can be used as the material for producing 90# paving bitumen.

  • colloidal properties during slurry bed Hydrocracking Reaction of kelamay atmospheric residue
    Journal of Petrochemical Universities, 2006
    Co-Authors: Que Guohe
    Abstract:

    Colloidal stability of Kelamay atmospheric residue(KLAR) during slurry-bed hydro-cracking Reaction under the condition of different Reaction time and temperature was studied by mass fraction normalized conductivity method,and the Yen T F colloidal structure model of residue was confirmed.It shows that the colloidal stability of KLAR during slurry-bed hydro-cracking Reaction decreases rapidly in induction period of coke formation and then the decrease slows down after induction period of coke formation;when the Reaction temperature rises,the colloidal stability of KLAR during slurry-bed Hydrocracking Reaction decreases.The reason for change of colloidal stability was explored through the measurement of group composition mass fractions and average relative molecular mass of Reaction products in different time.The researches show that the contents of saturates and light aromatic increases,the content of resin decreases and the relative molecular mass of maltene decreases as the Reaction progress;on the other hand,the group composition mass fraction and average relative molecular mass of asphaltene increase until coke formation occurred and then decrease.These changes jointly cause the deterioration of colloidal stability during slurry-bed hydro-cracking of residue and make the colloidal stability decrease.

Achmad Roesyadi - One of the best experts on this subject based on the ideXlab platform.

  • Bio-kerosene and Bio-gasoil from Coconut Oils via Hydrocracking Process over Ni-Fe/HZSM-5 Catalyst
    Diponegoro University, 2019
    Co-Authors: Muhammad Al-muttaqii, Danawati Hari Prajitno, Firman Kurniawansyah, Achmad Roesyadi
    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. Copyright © 2019 BCREC Group. All rights reserve

  • triglycerides Hydrocracking Reaction of nyamplung oil with non sulfided como γ al2o3 catalysts
    Bulletin of Chemical Reaction Engineering & Catalysis, 2018
    Co-Authors: Rismawati Rasyid, Achmad Roesyadi, Rahmaniah Malik, Heri Septya Kusuma, Mahfud Mahfud
    Abstract:

    The purpose of this research are to study the temperature influence in Hydrocracking process of the nyamplung oil (Calophyllum inophyllum) using a non-sulfided CoMo/γ-Al 2 O 3 catalyst and to develop a simple kinetic model in interpreting the data of Hydrocracking products. The experiment was carried out in a pressurized batch reactor operated pressure up 30 bar. The CoMo catalyst supported with γ-Al 2 O 3 was prepared through impregnation method without sulfidation process. The operating temperature varied from 200 to 350 o C. The results show that the non-sulfided CoMo/γ-Al 2 O 3 catalysts, nyamplung oil triglycerides can converted into gasoil and gasoline-like hydrocarbons. The triglyceride Hydrocracking Reaction of nyamplung oil followed a several stages, i.e., hydrogenation, dehydrogenation, and cracking. Based on the compounds contained in liquid product, Hydrocracking Reaction was dominated by decarboxylation. The products obtained in Hydrocracking process of nyamplung oil are classified to gasoil (C 11 -C 18 ) and gasoline (C 5 -C 10 ).  The triglycerides Hydrocracking Reaction of nyamplung oil was assumed by following a series Reaction mechanism and a simple kinetic model used for determined the kinetics constants. The highest Reaction conversion is 99.10% obtained at temperature of 350 °C for 160 minutes Reaction time. Copyright © 2018 BCREC Group. All rights reserved Received: 20 th October 2017; Revised: 8 th September 2017; Accepted: 17 th September 2017; Available online: 11 st June 2018; Published regularly: 1 st August 2018 How to Cite: Rasyid, R., Malik, R., Kusuma, H.S., Roesyadi, A., Mahfud, M. (2018). Triglycerides Hydrocracking Reaction of Nyamplung Oil with Non-sulfided CoMo/γ-Al 2 O 3 Catalysts. Bulletin of Chemical Reaction Engineering & Catalysis , 13 (2): 196-203 (doi:10.9767/bcrec.13.2.734.196-203)

  • Triglycerides Hydrocracking Reaction of Nyamplung Oil with Non-sulfided CoMo/γ-Al2O3 Catalysts
    'Bulletin of Chemical Reaction Engineering and Catalysis', 2018
    Co-Authors: Rismawati Rasyid, Achmad Roesyadi, Rahmaniah Malik, Heri Septya Kusuma, Mahfud Mahfud
    Abstract:

    The purpose of this research are to study the temperature influence in Hydrocracking process of the nyamplung oil (Calophyllum inophyllum) using a non-sulfided CoMo/γ-Al2O3 catalyst and to develop a simple kinetic model in interpreting the data of Hydrocracking products. The experiment was carried out in a pressurized batch reactor operated pressure up 30 bar. The CoMo catalyst supported with γ-Al2O3 was prepared through impregnation method without sulfidation process. The operating temperature varied from 200 to 350 oC. The results show that the non-sulfided CoMo/γ-Al2O3 catalysts, nyamplung oil triglycerides can converted into gasoil and gasoline-like hydrocarbons. The triglyceride Hydrocracking Reaction of nyamplung oil followed a several stages, i.e., hydrogenation, dehydrogenation, and cracking. Based on the compounds contained in liquid product, Hydrocracking Reaction was dominated by decarboxylation. The products obtained in Hydrocracking process of nyamplung oil are classified to gasoil (C11-C18) and gasoline (C5-C10).  The triglycerides Hydrocracking Reaction of nyamplung oil was assumed by following a series Reaction mechanism and a simple kinetic model used for determined the kinetics constants. The highest Reaction conversion is 99.10% obtained at temperature of 350 °C for 160 minutes Reaction time. Copyright © 2018 BCREC Group. All rights reserved Received: 20th October 2017; Revised: 8th September 2017; Accepted: 17th September 2017; Available online: 11st June 2018; Published regularly: 1st August 2018 How to Cite: Rasyid, R., Malik, R., Kusuma, H.S., Roesyadi, A., Mahfud, M. (2018). Triglycerides Hydrocracking Reaction of Nyamplung Oil with Non-sulfided CoMo/γ-Al2O3 Catalysts. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (2): 196-203 (doi:10.9767/bcrec.13.2.734.196-203

  • Hydrocracking of Non-edible Vegetable Oils with Co-Ni/HZSM-5 Catalyst to Gasoil Containing Aromatics
    Bulletin of Chemical Reaction Engineering & Catalysis, 2017
    Co-Authors: Danawati Hari Prajitno, Achmad Roesyadi, Muhammad Al-muttaqii, Lenny Marlinda
    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 o C for 2 h, reactor pressure of 15 bar after flowing H 2 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. Copyright © 2017 BCREC Group. All rights reserved. Received: 21 st November 2016; Revised: 9 th May 2017; Accepted: 20 th May 2017 ; Available online: 27 th October 2017; Published regularly : December 2017 How to Cite : Prajitno, D.H., Roesyadi, A., Al-Muttaqii, M., Marlinda, L. (2017). Hydrocracking of Non-edible Vegetable Oils with Co-Ni/HZSM-5 Catalyst to Gasoil Containing Aromatics. Bulletin of Chemical Reaction Engineering & Catalysis , 12(3):318-328 (doi:10.9767/bcrec.12.3.799.318-328)

  • production of biofuel by Hydrocracking of cerbera manghas oil using co ni hzsm 5 catalyst effect of Reaction temperature
    The Journal of Pure and Applied Chemistry Research, 2016
    Co-Authors: Lenny Marlinda, Muhammad Al-muttaqii, Achmad Roesyadi
    Abstract:

    This research aims to investigate the effect of various Reaction temperatures on the Hydrocracking of Cerbera manghas oil to produce biofuel as a paraffin-rich mixture of hydrocarbons with Co-Ni/HZSM-5 catalyst. Co-Ni/HZSM-5 catalyst was prepared by incipient wetness impregnation. The catalyst was characterized by X-ray diffraction (XRD), N 2 physisorption according to the Brunauer-Emmet-Teller (BET) method, and atomic absorption spectrometry (AAS). The Hydrocracking Reaction was carried out in a pressure batch reactor, Reaction temperatures of 300-375 o C for 2 hours, reactor pressure of 15 bar after flowing H 2 for at least 1 hour, and a catalyst/oil ratio of 1 g/200 ml. The hydrocarbon composition was determined by gas chromatography-mass spectrometry (GC-MS). With the Co(0.88%)-Ni(3.92%)/HZSM-5 catalyst, the highest yield for gasoil was 46.45% at temperature of 350 o C. At this Reaction temperature condition, the main abundant hydrocarbon compounds in gasoil-like hydrocarbon were n-paraffin, i.e. pentadecane of 20.06 area% and heptadecane of 14.13 area%. Biofuels produced showed that abundant hydrocarbon compounds were different at different Reaction temperatures. Iso-paraffin with low freezing point and good flow property were not found in gasoil-like hydrocarbon. Isomerization depends on Reaction condition and type of catalyst.