Improved Organic Rankine Cycle System Coupled with Mechanical Vapor Recompression Distillation for Separation of Benzene-Toluene Mixture

  • Xiaoxin GaoEmail author
  • Xueming Yin
  • Song Yang
  • Deming Yang
Original Research Paper


Herein, we propose three improved Organic Rankine Cycle (ORC) Systems to separate the benzene-toluene mixture by the combination of ORC with Mechanical Vapor Recompression (MVR) heat pump distillation process. A chemical process software, Aspen plus, was used to simulate all the processes. The improved ORC system was employed to recover waste heat from the MVR heat pump system. The ORC waste-heat power generation process was obtained based upon the net power output and cycle’s thermal efficiency. Finally, energy saving was considered as primary criteria for the ORC system selection. The results showed that the ORC system by exhaust stream regenerative cycle (EGC) coupled with MVR heat pump distillation process saves 21.29% electrical energy. The ORC system by EGC coupled with MVR heat pump distillation process has more energy-saving advantages.


Organic Rankine cycle ORC improvement Energy-saving 



Mechanical Vapor Recompression


Organic Rankine Cycle








total annual cost

P1, P2

pump1, pump2


exhaust stream regenerative cycle process


extraction steam reheat cycle


reheating cycle process

mwf (kg/s)

the working fluid flow;

ηGEN (%)

the efficiency of generator;

h1 (kJ/kg) and h2 (kJ/kg)

the enthalpy of working fluid at the inlet and outlet of pump;

υ (m3/kg)

the specific volume of working fluid at the inlet of pump;

P5 (Pa) and P6 (Pa)

the pressures at the inlet and outlet of pump;

h5 (kJ/kg) and h6 (kJ/kg)

the enthalpies of working fluid at the inlet and outlet of turbine


Funding Information

This research was funded by Changzhou University, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, 213164.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Xiaoxin Gao
    • 1
    • 2
    Email author
  • Xueming Yin
    • 2
  • Song Yang
    • 1
    • 2
  • Deming Yang
    • 1
    • 2
  1. 1.Jiangsu Key Laboratory of Advanced Catalytic Materials and TechnologyChangzhou UniversityChangzhouPeople’s Republic of China
  2. 2.College of Petrochemical EngineeringChangzhou UniversityChangzhouPeople’s Republic of China

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