• Title, Summary, Keyword: distillation

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Vacuum Distillation of Rocket Grade Hydrogen Peroxide with Temperature (온도 조건에 따른 추진제급 과산화수소의 진공 증류)

  • Chung, Seung-Mi;An, Sung-Yong;Kwon, Se-Jin
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.89-92
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    • 2009
  • Because many research using concentrated hydrogen peroxide as propellant is studied, research for distillation method for domestic production of rocket grade hydrogen peroxide is needed. To distill hydrogen peroxide, vacuum distillation will be used because of heat decomposition of hydrogen peroxide. Distillation pressure is 30 torr which is determined by Raoult's law to distill under $40^{\circ}C$. Variable of distillation experiment is distillation temperature. And the comparison of distillation results was done by yield and operation time. In the result, generally, yield was lower and the water in receiver had higher concentration with shorter distillation time. And with similar time, when distillation temperature was higher, yield was lower and hydrogen peroxide became higher concentration.

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Experimental Distillation Using a Fully Thermally Coupled Distillation Column with Separated Main Columns (분리주탑형 열복합 증류탑에서의 증류실험)

  • Park, Young-Min;Kang, Hyun-Woog;Kim, Young-Han
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.12
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    • pp.1197-1201
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    • 2006
  • In order to improve the operability in a fully thermally coupled distillation column the main column is separated into an upper and a lower column, and its design method is explained. With a distillation experiment using a two-inch column the operability of the proposed column is examined. Readily available methanol, ethanol and propanol are used as the feed, and the experimental result is compared with that of the HYSYS simulation. It is found from the experiment that the recovery ranges between 58.8% and 68% and the distillation efficiency is lower than that of the simulation. consumes less energy than an original column, it is not widely implemented in practice due to its operational difficulty. However, it is proved that the proposed distillation column can be operated without compressors and it can be practically utilized.

Application of Energy-Efficient Distillation System in Ethanol Process (에너지 절약형 증류시스템의 에탄올 제조공정에의 응용)

  • Lee, Moon Yong;Kim, Young Han
    • Korean Chemical Engineering Research
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    • v.46 no.5
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    • pp.892-897
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    • 2008
  • A new ethanol dehydration process utilizing a thermally coupled distillation column is proposed to reduce the energy requirement of the existing dehydration processes. An entrainer of benzene is used in the proposed system having the column profile similar to the equilibrium composition profile for the maximum distillation column efficiency, and the feed composition is arranged to close to the boundary of different distillation regions. It is found that the proposed distillation system gives some 18% of energy saving over the existing process. In addition, design guidelines are suggested for other azeotropic distillation process.

A Simple Distillation Process Produce Fuel from Plastic Waste using Incorporate Heat Source

  • Thawichsri, Kosart;nilnont, Wanich
    • International journal of advanced smart convergence
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    • v.4 no.1
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    • pp.127-136
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    • 2015
  • This paper is a study of a simple distillation process. Its objective is to compare fuel production from plastic waste, its data collecting is from the factory and simple data calculated a suitable evaluation on the simple distillation plant built before calculation. The experiment with a simple distillation process is separated into three sections. The first section is a simple distillation process of distillation producing diesel using heat source by biomass. The second section is distillation process which produces fuel using heat source by burner. The third section uses heat source by burner incorporate with biomass. The experiment reveals that the result of the second section is the most efficient. In comparison with the experiments and the simple calculation, the result on the efficiency of work has error less than 5% and it is sufficient for the next experimental process. Thus, the study and design on a simple distillation process produces fuel from plastic waste has to concern mainly on design heat exchangers, flow rate and optimized temperature. Further study on this plant can be developed throughout the county due to its low cost and efficiency.

Design of Gas Concentration Process with Thermally Coupled Distillation Column Using HYSYS Simulation (HYSYS를 이용한 열복합 증류식 가스 농축공정의 설계)

  • 이주영;김영한;황규석
    • Journal of Institute of Control, Robotics and Systems
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    • v.8 no.10
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    • pp.842-846
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    • 2002
  • Design of gas concentration process using a fully thermally coupled distillation is conducted with the commercial design software HYSYS. Detailed procedure of the design is explained, and the performance of the process is compared with that of a conventional system A structural design is exercised for the design convenience. The design outcome indicates that the procedure is simple and efficient. The structural information yielded from equilibrium distillation gives an easy formulation of distillation system which is the initial input required from the setup of the distillation system The performance of the new process indicates that an energy saving of 17.6 % is obtained compared with the conventional process while total number of trays maintains at the same.

Basic Study for Distillation of Rocket Grade Hydrogen Peroxide (추진제 급 과산화수소 증류를 위한 기초 연구)

  • Chung, Seung-Mi;An, Sung-Yong;Kwon, Se-Jin
    • Proceedings of the Korean Society of Propulsion Engineers Conference
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    • pp.67-70
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    • 2009
  • Because many research using rocket grade peroxide is studied, distillation method for domestic production of rocket grade hydrogen peroxide is required. Distillation methods are very various and divided by feeding method, distillation time, distillation pressure, and so on. Among these, vacuum distillation is a suitable method for hydrogen peroxide. This method can reduce thermal decomposition and reaction with impurities. Distillation condition is determined by Raoult's law. Low vacuum level and vacuum level control are appeared as important problems of the experiment equipment, which are solved by using less leakage vacuum chamber and metering valve.

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Preparation of isotropic spinnable pitch and carbon fiber from biomass tar through the co-carbonization with ethylene bottom oil

  • Yang, Jianxiao;Shi, Kui;Li, Xuanke;Yoon, Seong-Ho
    • Carbon letters
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    • v.25
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    • pp.89-94
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    • 2018
  • In this study, we tried to prepare an isotropic spinnable pitch which can be useful to prepare the general purpose carbon fiber through the co-carbonization of biomass tar with ethylene bottom oil under two different preparation methods (atmospheric distillation, pressurized distillation). The results showed that the ethylene bottom oil added co-carbonization was very effective to decrease of the oxygen contents for obtaining a stable spinnable pitch. The pressurized distillation was more effective to reduce the oxygen functional groups of pitches than atmospheric distillation. The obtained spinnable pitch by the pressurized distillation showed higher pitch yield of 42% and lower oxygen content of 9.12% than the spinnable pitch by the atmospheric distillation. The carbon fiber derived from the pressurized distillation spinnable pitch by carbonization at $800^{\circ}C$ for 5 min showed that the higher tensile strength of carbon fiber was increased up to 800 MPa.

Improved Operability in a Fully Thermally Coupled Distillation Column with an Intermediate Heat Exchanger (중간 열교환기를 이용한 열복합 증류탑의 운전성 향상)

  • Jeong, Su-Yeong;Kim, Young-Han
    • Journal of Institute of Control, Robotics and Systems
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    • v.12 no.9
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    • pp.945-953
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    • 2006
  • Though a fully thermally coupled distillation column consumes less energy than an original column, it is not widely implemented in practice due to its operational difficulty. A new fully thermally coupled distillation column is proposed for the operability improvement, and its performance is investigated. The main improvement is the separation of a main column to give an upper and lower columns and the installation of an intermediate heat exchanger between them to regulate the fluctuation of product compositions. A proper manipulation of column pressure in the separated main columns made easy vapor flow without a compressor. The operability improvement is examined in a hexane process from the dynamic simulation using a commercial design software HYSYS. The simulation results indicate that the coupling among inputs and outputs is loosened to make easy manipulation of product compositions in the proposed distillation system.

Process simulation for the recovery of lactic acid using thermally coupled distillation columns to mitigate the remixing effect

  • Kim, Sung Young;Kim, Dong Min;Lee, Bomsock
    • The Korean Journal of Chemical Engineering
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    • v.34 no.5
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    • pp.1310-1318
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    • 2017
  • The objective of this study was to find process simulations of the plant-wide scale lactic acid recovery process using thermally coupled distillation columns to mitigate the remixing effect. The remixing effect has been widely discussed because in a conventional column arrangement it induces a need for a significant amount of energy for repurification in lactic acid recovery processes. One way to overcome high energy consumption is by using thermally coupled distillation columns. This paper suggests and compares two types of thermally coupled distillation columns applied to the plant-wide scale lactic acid recovery process for removing the remixing effect considering a heavy organic impurity and lactic acid oligomerization in the process. The equilibrium stage model based on the RADFRAC module of Aspen Plus was employed for simulating the thermally coupled distillation columns. Simulation results showed that thermally coupled distillation columns can eliminate the remixing effect and reduce energy consumption compared to conventional lactic acid recovery processes.

Nonlinear Model Based Control of Two-Product Reactive Distillation Column

  • Lee, In-Beum;Han, Myung-Wan
    • 제어로봇시스템학회:학술대회논문집
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    • pp.50.3-50
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    • 2001
  • Nonlinear feedback control scheme for reactive distillation column has been proposed. The proposed control scheme is derived in the framework of Nonlinear Internal Model Control. The product compositions and liquid and vapor flow rates in sections of the reactive distillation column are estimated from selected tray temperature measurements by an observer. The control scheme is applied to example reactive distillation column in which two products are produced in a single column and the reversible reaction A + B = C + D occurs. The relative volatilities are favorable for reactive distillation so that the reactants are intermediated boilers between the light product C and the heavy product D. Ideal physical properties, kinetics and ...

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