Study of the Conversion of Dimethyl Ether to Gasoline with Modified HZSM-5 Catalysts

• Main Authors: Yeh, Feng-Mei, 葉鳳梅
• Other Authors: Lee, Jeou-Long
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/31725890388422088422

碩士 === 龍華科技大學 === 工程技術研究所 === 101 === In this study, the gasoline catalysts are prepared from the commercial HZSM-5 zeolite with the special heat treatment. The catalyst performance is tested with the experimental conditions listed bellow: reactants = 96.5 vol.% dimethyl ether with 3.5 vol.% N2, reaction temperature 300 ℃, reaction pressure 1.5 kg/cm2, and WHSV 6.5 h-1. The results depict that the lifetime of the catalyst with special heat treatment are up to 200 hours during 5 times of the regeneration process. The collected liquid products decreased as regeneration more than 5 times. The catalyst is totally deactivated after 8 times regeneration. The PONA compositions of the oil phase products are analyzed by the PONA method at the CPC. The results show that the benzene concentration of all samples are less than 0.3% and total aromatics contents are lower than 30% as catalysts with the special heat treatment employed. However, the total olefin contents are higher than 25% and over the legal limit。