RESEARCH ON PREPARATION OF PHASE CHANGE PARAFFIN WAX WITH LOW MELTING POINT BY UREA DEWAXING

Abstract

Abstract: Using the No.1 vacuum cut as raw material，the technology for preparation of phase change wax with low melting point by urea dewaxing were studied. The results showed that the optimum process conditions was that the complexation temperature was 25 ℃，the adding amount of urea solution was 91%，the composition of urea solution was m（urea）：m（isopropyl alcohol）：m（water）=45：35：20，the reaction time was 60min，the mass ratio of washing solvent to oil was 76%. Under these conditions，the yield of crude wax was 28.2% with a melting point of 29.6 ℃，the mass fraction of n-alkanes in crude wax was 94.9%，and the condensation point of dewaxed oil was less than －60 ℃. The phase change wax with a melting point of 31 ℃, and an enthalpy of 201.9 kJ/kg was obtained after perspiring.

Key words: urea dewaxing, phase change material, latent heat storage, n-alkane, phase change wax, vacuum gas oil

References

[1]P Vinod Kumar Naidu， Ajay M Nair，Analysis of Paraffin Wax as a Phase Change Material[J].International Journal of Current Engineering and Technology, 2018, 8[1]:52-55[J].International Journal of Current Engineering and Technology, 2018, 8(1):52-55 [2]P K Mahto1, R Chaudhary, S Chowdhury, Development of PCM (paraffin wax) based Latent heat Storage type Solar powered Thermo-electric generator[C], IOP Conf.Series: Materials Science and Engineering, 2018: 1-8 [3] Zeshan Abbas, Khuram Shahzad, Saeed Jamal, Paraffifin Wax As A Phase Change Material For Thermal Energy Storage: Tubes In Shell Type Heat Exchanger[J].North American Academic Research 2018, 1(2):39-52[J].IOP Conf. Series: Materials Science and Engineering, 2018, 1(2):39-52 [4]Azain Sayekar, Akshay Mali, Nagesh Wadekar, A Review on PCM Heat Exchanger Using Paraffin Wax, Journal of Modern Thermodynamics in Mechanical System[J].Journal of Modern Thermodynamics in Mechanical System, 2019, 1(2):18-23[J].Journal of Modern Thermodynamics in Mechanical System, 2019, 1(2):18-23 [5]刘玮, 周志华, 司黄欣等.碳纤维导热型低温相变材料蓄热电暖器蓄放热性能实验研究[J].暖通空调, 2019, 49[2] :111-116[J].暖通空调, 2019, 49(2):111-116 [6]李南烁，汤梓聪，伍健宜等.翅片盘管式相变储热器传热性能研究[J].广东工业大学学报, 2019, 36(2):91-96 [7]韩林岑，朱群志.基于相变材料的太阳能电池板温度控制实验研究[J].上海电力学院学报, 2019, 35(4):391-403 [8]黄瑞，洪文华，俞小莉等.锂离子动力电池相变冷却实验研究[J].实验技术与管理, 2019, 36(10):81-85 [9]郭梦雪.套管式相变蓄热器内管排列方式和壁温的影响[J].煤气与热力, 2019, 39(5):1-7 [10]Mahyar Silakhori 1, Mohammad Sajad Naghavi ,.Hendrik Simon Cornelis Metselaar, Accelerated Thermal Cycling Test of Microencapsulated Paraffin Wax/Polyaniline Made by Simple Preparation Method for Solar Thermal Energy Storage[J].Materials, 2013, 6(6):1608-1620 [11]Xi-li DUAN, Josh Roul, Stephan Ryan,. Solar Thermal Energy Storage with Phase Change Material - Heat Exchanger Design and Heat Transfer Analysis[J].Advances in Engineering Research, 2016, 1(94):370-372

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