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One step NaBH_4 reduction of Pt-Ru-Ni catalysts on different types of carbon supports for direct ethanol fuel cells : Synthe sis and characte rization

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燃料化学学报 2017年第5期45卷 596-607页

作者： Napha Sudachom Chompunuch Warakulwit Chaiwat Prapainainar Thongthai Witoon Paweena Prapainainar National Center of Excellence for Petroleum Petrochemicals and Advance MaterialDepartment of Chemical EngineeringFaculty of EngineeringKasetsart University Center for Advanced Studies in Nanotechnology for Chemical Food and Agricultural IndustriesKU Institute for Advanced StudiesKasetsart University Physical Chemistry Department Kasetsart University Department of Chemical Engineering King Mongkut's University of Technology North Bangkok Research and Development Centre for Chemical Engineering Unit Operation and Catalyst Design King Mongkut's University of Technology North Bangkok

The ternary catalyst Pt75Ru5Ni20 was conducted on various types of carbon supports including functionalized Vulcan XC-72R(f-CB),functionalized multi-walled carbon nanotubes(f-MWCNT),and mesoporous carbon(PC-Zn-succinic)by sodium borohydride chemical reduction method to improve the ethanol electrooxidation reaction(EOR)for direct ethanol fuel cell(DEFC).It was found that the particle size of the metals on f-MWCNT was 5.20 nm with good particle *** alloy formation of ternary catalyst was confirmed by XRD and more clearly described by SEM element mapping,which was relevant to the efficiency of the ***,the mechanism of ethanol electrooxidation reaction based on the surface reaction was more *** activity and stability for ethanol electrooxidation reaction(EOR)were investigated using cyclic voltammetry and chronoamperometry,*** highest activity and stability for EOR were observed from Pt75Ru5Ni20/f-MWCNT due to a good metal-carbon *** and Ni presented in Pt-Ru-Ni alloy improved the activity and stability of ternary catalysts for ***,the reduction of Pt content in ternary catalyst led to the catalyst cost deduction in DEFC.

关键词： ternary catalyst ethanol electrooxidation reaction multiwall carbon nanotubes mesoporous carbon

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Numerical study of micro-reactor inlet geometry for fischer-tropsch synthesis

Numerical study of micro-reactor inlet geometry for fischer-...

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International Conference on Advanced Materials, Structures and Mechanical engineering, ICAMSME 2015

作者： Chaiwang, W. Theampetch, A. Narataruksa, P. Prapainainar, C. Department of Chemical Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Research and Development Center Chemical Engineering Unit Operation and Catalyst Design King Mongkut’s University of Technology North Bangkok Bangkok Thailand

ISBN: (纸本)9781138027930

In this work, the effect of inlet manifold geometry of a microchannel reactor for Fischer- Tropsch Synthesis (FTS) is studied using a Computational Fluid Dynamics (CFD) model. The model comprises 36 parallel flow channels, with a conical shape of inlet diffuser, and the flow channels are at the micron scale. In order to minimize maldistribution of gaseous reactants (H2 and CO), the geometry, that is, diffuser length and width, of the inlet of the reactor entrance are focused on. The results show that optimal inlet geometry can be obtained with a given degree of flow uniformity. For such design, low deviation of the average velocity in all flow channels, with lower than 0.5% degree of uniformity, is obtained. © 2016 Taylor & Francis Group, London.

关键词： Fischer-Tropsch synthesis

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Conversion enhancement of tubular fixed-bed reactor for Fischer-Tropsch synthesis using static mixer

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Journal of Natural Gas Chemistry 2012年第4期21卷 435-444页

作者： Phavanee Narataruksa Sabaithip Tungkamani Karn Pana-Suppamassadu Phongsak Keeratiwintakorn Siriluck Nivitchanyong Piyapong Hunpinyo Hussanai Sukkathanyawat Prayut Jiamrittiwong Visarut Nopparat Department of Chemical Engineering Faculty of EngineeringKing Mongkut's University of Technology North BangkokBangkok 10800Thailand Research and Development Center for Chemical Engineering Unit Operation and Catalyst Design(RCC) STRI BuildingFloor 1st and 7th(Room 702)King Mongkut's University of Technology North BangkokBangkok 10800Thailand Department of Industrial Chemistry Faculty of Applied ScienceKing Mongkut's University of Technology North BangkokBangkok 10800Thailand Department of Electrical Engineering Faculty of EngineeringKing Mongkut's University of Technology North BangkokBangkok 10800Thailand National Science and Technology Development Agency(NSTDA) Klong luangPathumthani 12120Thailand

Recently, Fischer-Tropsch synthesis （FTS） has become an interesting technology because of its potential role in producing biofuels via Biomass- to-Liquids （BTL） processes. In Fischer-Tropsch （FT） section, biomass-derived syngas, mainly composed of a mixture of carbon monoxide （CO） and hydrogen （H2）, is converted into various forms of hydrocarbon products over a catalyst at specified temperature and pressure. Fixed-bed reactors are typically used for these processes as conventional FT reactors. The fixed-bed or packed-bed type reactor has its drawbacks, which are heat transfer limitation, i.e. a hot spot problem involved highly exothermic characteristics of FT reaction, and mass transfer limitation due to the condensation of liquid hydrocarbon products occurred on catalyst surface. This work is initiated to develop a new chemical reactor design in which a better distribution of gaseous reactants and hydrocarbon products could be achieved, and led to higher throughput and conversion. The main goal of the research is the enhancement of a fixed-bed reactor, focusing on the application of KenicsTM static mixer insertion in the tubular packed-bed reactor. Two FTS experiments were carried out using two reactors i.e., with and without static mixer insertion within catalytic beds. The modeled syngas used was a mixed gas composed of H2/CO in 2 ： 1 molar ratio that was fed at the rate of 30 mL（STP）·min^- 1 （GHSV ≈ 136 mL·gcat^-1 ·h^-1） into the fixed Ru supported aluminum catalyst bed of weight 13.3 g. The reaction was carried out at 180 ℃ and atmospheric pressure continuously for 36 h for both experiments. Both transient and steady-state conversions （in terms of time on stream） were reported. The results revealed that the steady-state CO conversion for the case using the static mixer was approximately 3.5 times higher than that of the case without static mixer. In both cases, the values of chain growth probability of hydrocarbon products （α） for Fischer-Tropsch synthesis were

关键词： Fischer-Tropsch synthesis fixed-bed reactor packed-bed reactor static mixer

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Economic potential of diesel-like renewable fuel production from the by-product of the palm oil refining process

Economic potential of diesel-like renewable fuel production ...

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International Conference on Advanced Materials, Structures and Mechanical engineering, ICAMSME 2015

作者： Kantama, A. Prapainainar, C. Narataruksa, P. Hunpinyo, P. Department of Chemical Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Research and Development Centre for Chemical Engineering Unit Operation and Catalyst Design King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Chemical Process Engineering Technology King Mongkut’s University of Technology North Bangkok Rayong Thailand

ISBN: (纸本)9781138027930

This work examined the economic potential of diesel-like renewable fuel or Bio-Hydrogenated Diesel (BHD) production from Palm Fatty Acid Distillate (PFAD), a by-product from the palm oil refining process. Alternative block flow diagrams for BHD production from different potential raw materials were proposed. Consequently, BHD production from PFAD was studied using a chemical process simulation tool. A capacity of 50 tonnes per day of PFAD feed was used as a case study, as it was the potential feed capacity from an existing refining palm oil plant in Thailand. It was found that when sold at Thailand retail price, PFAD to BHD has the potential of gaining 9.37% higher revenue than PFAD that is directly sold as a feedstock to other industries. © 2016 Taylor & Francis Group.

关键词： Palm oil

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Economic evaluation of hydroconversion of fatty acid methyl ester into renewable liquid hydrocarbons

Economic evaluation of hydroconversion of fatty acid methyl ...

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International Conference on Advanced Materials, Structures and Mechanical engineering, ICAMSME 2015

作者： Kantama, A. Narataruksa, P. Prapainainar, C. Hunpinyo, P. Department of Chemical Engineering King Mongkut’s University of Technology North Bangkok Bangkok Thailand Research and Development Centre for Chemical Engineering Unit Operation and Catalyst Design King Mongkut’s University of Technology North Bangkok Bangkok Thailand Department of Chemical Process Engineering Technology King Mongkut’s University of Technology North Bangkok Rayong Thailand

ISBN: (纸本)9781138027930

In this study, economic evaluation of renewable liquid hydrocarbon production, in Thailand, from fatty acid methyl ester, FAME, is studied. The production of liquid hydrocarbons or bio hydrogenated diesel, BHD, is processed via hydro-conversion, in a capacity of 180 tonne/day of FAME by using chemical process simulation software. The main products are alkane hydrocarbons, C1–C18, and are categorized as light gas, naphtha and diesel. Techno-economic evaluation of BHD production is carried out and it is found that total capital investment is 63.460 million USD. With the project life of 15 years, the acceptable BHD price is 1.22 USD/L providing a conventional payback period of 7.2 years and a return on investment of 10%, which normally referred to as a minimum acceptance in chemical process industry. The selling price of BHD must be increased to 1.135 and 1.391 USD/L if the investment attractiveness is changed to obtain the payback period of 10 and 5 years, respectively. Finally, the sensitivity analysis to determine the effect of FAME cost, hydrogen cost, operating cost and purchased equipment cost on BHD price is performed. © 2016 Taylor & Francis Group, London.

关键词： Computer software

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design Equations for Catalytic Microchannel Reactors: Fischer-Tropsch Synthesis

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Energy Procedia 2015年 79卷 772-777页

作者： Nutthawoot Jermkwan Piyanut Inbamrung Phavanee Narataruksa Chaiwat Prapainainar Department of Chemical Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Thailand Research and Development Center for Chemical Unit Operation and Catalyst Design Science and Technology Research Institute King Mongkut's University of Technology North Bangkok Thailand

In this work, the design equations for a two-dimensional catalytic microchannel reactor for Fischer-Tropsch synthesis were studied. The main objective of the design procedure was to obtain optimal dimension of height (H) and length (L) responding to Co-Re/γ-Al 2 O 3 catalyst operated with a space time of 0.0045 (g·cat min)·Ncm -3 . The objective function was created in term of dimensionless numbers and the ratio of channel length to height. The channel length was divided into three distinct regions depending on controlled regimes comprising of kinetic controlled, external diffusion controlled and fluid flow rates controlled regimes. The dimensionless of reaction rate was maximized by varying its aspect ratio L/H to obtain the optimal channel length at a given channel height with the maximum reaction rate. From the study, the optimal length of microchannel reactor with the height of 0.5, 0.7 and 1.0 mm were 17.20, 28.49 and 48.70 mm respectively.

关键词： Fischer-Tropsch synthesis microchannel reactor design equations.

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Numerical study of micro-reactor inlet geometry for Fischer-Tropsch synthesis

Numerical study of micro-reactor inlet geometry for Fischer-...

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The 2015 International Conference on Advanced Materials,Structures and Mechanical engineering(ICAMSME 2015)

作者： W.Chaiwang A.Theampetch P.Narataruksa C.Prapainainar Department of Chemical Engineering Faculty of EngineeringKing Mongkut’s University of Technology North Bangkok Research and Development Center for Chemical Engineering Unit Operation and Catalyst Design King Mongkut’s University of Technology North Bangkok

In this work,the effect of inlet manifold geometry of microchannel reactor for Fischer-Tropsch synthesis（FTS） is studied using computational fluid dynamics（CFD） *** model comprises of 36 flow channel with a triangular shape of inlet diffuser and the flow channel in the range of *** order to minimize maldistribution of gases reactant（H and CO）,the geometry of reactor entrance including diffuser length and width of inlet are *** results show that the optimal dimension of inlet geometry can be obtained with a given the degree of flow uniformity at the region above the relation D/W and L/W *** this area of design,low deviation of average velocity in all flow channel with lower than 0.5% degree of uniformity is obtained.

关键词： Numerical study of micro-reactor inlet geometry for Fischer-Tropsch synthesis

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The Effect of Feed Location of a Semi-Batch Reactive Distillation via Esterification Reaction of Acetic Acid and Methanol: Simulation Study

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Energy Procedia 2015年 79卷 778-783页

作者： Suputtharagris Akkaravathasinp Phavanee Narataruksa Chaiwat Prapainainar Department of Chemical Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Research and Development Center for Chemical Unit Operation and Catalyst Design Science and Technology Research Institute King Mongkut's University of Technology North Bangkok 1518 Pracharat 1 Rd. Wongsawang Bangsue Bangkok 10800 Thailand

This paper studied the effect of feed location of semi-batch reactive distillation via esterification reaction of acetic acid and methanol producing methyl acetate using Aspen Batch Distillation model. The reactive distillation model used was developed following a design of an in-house made reactive distillation column, which comprised of seven stages: five possible feed stages, where solid catalyst for the reaction was contained, a reboiler and a condenser. The main objectives of this semi-batch reactive distillation operation were to obtain a high yield of methyl acetate product with 95wt% purity. In the operation, methanol was charged to the reboiler and acetic acid was fed to the column continuously at five different feed stages. From the simulation results, it showed that the feed location of acetic acid affecting on the yield and the purity of the main product at the top stage of the column. It was found that the optimum feed stage of acetic acid was at stage four giving the maximum yield and purity of methyl acetate at 74.74% by mole and 97.36wt%, respectively.

关键词： Reactive distillation esterification aspen batch distillation simulation

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Techno-economic assessment of FT unit for synthetic diesel production in existing stand-Alone biomass gasification plant using process simulation tool 21

Techno-economic assessment of FT unit for synthetic diesel p...

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21st International Congress of chemical and Process engineering, CHISA 2014 and 17th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction, PRES 2014

作者： Hunpinvo, Piyapong Narataruksa, Phavanee Tungkamani, Sabaithip Pana-Suppamassadu, Karn Chollacoop, Nuwong Department of Chemical and Process Engineering Technology Faculty of Engineering and Technology King Mongkut's University of Technology North Bangkok 1518 Pracharat Sai 1 Road Bang-Sue Bangkok10800 Thailand Department of Industrial Chemistry Faculty of Applied Science King Mongkut's University of Technology North Bangkok Thailand Research and Development Center for Chemical Engineering Unit Operation and Catalyst Design STRI Building King Mongkut's University of Technology North Bangkok Floor P and 7th Room 702 Thailand National Science and Technology Development Agency Thailand

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Effect of pore size diameter of cobalt supported catalyst on gasoline-diesel selectivity

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Energy Procedia 2017年 138卷 1035-1040页

作者： Saowaluk Intarasiri Tanakorn Ratana Thana Sornchamni Monrudee Phongaksorn Sabaithip Tungkamani Department of Industrial Chemistry King Mongkut’s University of Technology North Bangkok Bangkok Thailand Research and Development Center for Chemical Engineering Unit Operation and Catalyst Design (RCC) King Mongkut’s University of Technology North Bangkok Bangkok Thailand PTT Public Company Limited Bangkok Thailand

Fischer Tropsch synthesis (FTS) are renewed and interesting reaction for producing long chain hydrocarbons over metal supported catalyst. In this work, the effect of pore size diameter of cobalt supported mesoporous silica, synthesized by different method, on selectivity and activity towards gasoline and diesel were investigated. Cobalt-based catalyst was characterized by BET and H 2 -TPD technique. The FTS performance was carried out in a fixed bed reactor at 220°C, 1 atm, and GHSV of 305 h -1 for 24 h time-on-stream using H 2 :CO ratio of 2:1. The results show that pore size diameter of 20CS1 catalyst is larger than 20CS2 catalyst. Larger particle size of 20CS1 catalyst results in a lower dispersion of Co metallic. Moreover, 20CS1catalyst gives high selectivity of gasoline-diesel products, while 20CS2 catalyst is selective to methane production.

关键词： Cobalt-based catalyst Fischer-Tropsch reaction gasoline-diesel fuel

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