摘要
为开发环境友好的重整芳烃脱烯烃工艺，采用固定床反应装置进行了重整重芳烃脱烯烃杂质的固体酸催化反应工艺研究。研究结果表明，催化剂活性稳定性随着热处理温度升高而逐渐提高，烯烃转化率随着反应温度升高或空速降低而增大。在温度240℃、压力2.0 MPa、质量空速1.0 h-1反应条件下，用300℃热处理催化剂进行持续90天的芳烃脱烯烃反应，烯烃转化率从91.4%降低到85.8%。芳烃脱烯烃反应不影响芳烃组成。在温度220-260℃、压力3.0 MPa、质量空速1.0 h-1条件下考察催化剂活性稳定性，经120天持续反应精制产物溴指数保持在100 mg-Br/100 g以下，烯烃转化率大于88%。对失活催化剂分别进行乙醇和二氯甲烷器内洗涤再生，以及器内空气烧焦再生，三种再生催化剂的活性均接近新鲜催化剂活性水平。所开发的重整芳烃精制新工艺具有良好的应用前景。
To develop an environmentally friendly technology of trace olefins removal for reforming aromatic hydrocarbons, the reaction process for the removal of trace olefins from reforming heavy aromatic hydrocarbons over solid acid catalyst was studied in a fix-bed reactor. With the increase of catalyst heat treatment temperature, the catalyst could have better activity stability. With increase of reaction temperature and decrease of weight-hourly space velocity （WHSV）, the conversion of olefins increased. Under the reaction conditions of temperature of 240 ℃, pressure of 2.0 MPa, WHSV of 1.0 h-1, the conversion of olefins drops from 91.4%to 85.8%through time on streams of 90 days with the catalyst treated in nitrogen flow of 300 ℃. The aromatic hydrocarbons refinement did not affect the components of the aromatic mixtures. The bromine index of refined aromatics maintained below levels of 100 mg-Br/100 g and the olefins conversion maintained more than 88% through time on stream of 120 days under the reaction conditions of temperature of 220-260 ℃, pressure of 3.0 MPa, WHSV of 1.0 h-1. The coking deactivated catalysts were regenerated in situ through extraction with alcohol or dichloromethane, and through burning in air stream. The catalytic activities of three kinds of regenerated catalysts were all close to the catalytic activity of new catalyst. The new refined technology for reforming aromatics has a good application prospect.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2014年第2期150-155,共6页
Chemical Reaction Engineering and Technology
关键词
重整芳烃
脱烯烃
固体酸催化剂
失活动力学
催化剂再生
reforming aromatic hydrocarbon
olefins removal
solid acid catalyst
deactivated kinetics
catalyst regeneration
