Production of bio-oil by hydrocracking of tung oil in continuous catalyst bed system

• Main Authors: Yu Tseng, 曾宇
• Other Authors: 張慶源
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/5ykjn6

碩士 === 國立臺灣大學 === 環境工程學研究所 === 105 === In order to solve for the problems of lack of energy and the disasters by climate change, the bio-fuel has recently become a notable renewable energy. This study synthesized the Mo2C/γ-Al2O3 catalyst and applied it for the hydro-cracking of tung oil via the continuous flow process to produce the bio-fuel which could substitute the aviation fuel. The hydro-cracking was carried out in a fixed catalytic bed. Key system variables were examined to find out the proper operating conditions. These included cracking temperature (TC), flow rate of hydrogen (QG), pressure of hydrogen (PH2), and amount of catalyst (mC). Comparison of using working gases of H2 and N2 was made to elucidate the role of H2. Properties of product of bio-fuel measured included acid value (AV), iodine value (IV), density (ρLO), heating value (HV), contents of hydrogen (MH) and oxygen (MO), and distribution of carbon numbers. Following the sequence of testing on TC, QG, pH2, and mC, the proper operation conditions were determined as 723 K, 250 sccm, 50 psig, and 25 g, respectively. The IV, HV, and MO of bio-fuel thus produced were satisfied with those of standards of aviation fuel Jet A-1. The AV, ρLO, and MH of bio-fuel could not meet the standards of Jet A-1, however, with small differences only. These small deficits can be resolved by blending an acceptable portion of bio-fuel with the Jet A-1. The distribution of carbon numbers of bio-fuel was close to that of Jet A-1. Further, the results of GC-MS analysis showed the bio-fuel was rich in linear alkanes, supporting that the catalytic hydro-cracking is effective.