碳四烃芳构化烷基化生产高辛烷值汽油组分联产蒸汽裂解料技术

研究纳米沸石分子筛SHY-DL催化剂上的芳构化反应性能,探索临氢条件、二烯烃含量、反应温度及空速等条件对芳构化反应的影响。在固定床反应器上以炼油厂碳四烃为原料,在反应温度360～450℃、压力2.0MPa、碳四烃液相进料体积空速0.9～1.2h-1的操作条件下,碳四烯烃转化率达99%,干气产率小于2.0%,C5+液相收率为43%～50%,液相产物的RON和MON值为98.8和87.9。在实验室蒸汽热裂解评价装置上,研究碳四烃芳构化副产LPG裂解制乙烯的性能。结果表明,在裂解温度910℃、水油质量比0.45的条件下,LPG裂解的乙烯收率为30.98%,丙烯收率为15.95%,属较好的裂解制乙烯原料。

CO-PRODUCTION TECHNOLOGY OF HIGH OCTANE NUMBER GASOLINE AND STEAM CRACKING FEED BY C4 AROMATIZATION AND ALKYLATION

To make use of C4 olefins is extensively concerned by domestic petro-chemicals enterprises. The aromatization performance of nano-sized zeolite catalyst SHY-DL is studied in the thesis. The effect of hydrogen pressure, alkadiene content, and reaction temperature and space velocity on aromatization is explored. The results indicate that with refinery C4 as feedstock, under the conditions of 360℃ to 450℃, 2.0MPa, LHSV 0.9h-1 to 1.2h-1, the conversion of C4 olefin can be up to 99% and that the yield of dry gas is less than 2 %, the yield of C5 and C5+ is 43% to 50% and the RON and MON of the gasoline are 98 and 87.9, respectively. The cracking performance of the by-product LPG obtained in the aromatization process was evaluated on a bench scale pyrolysis apparatus. The yield of ethylene is 30.98%, the yield of ethylene and propylene is 46.93% under the cracking conditions of 910℃ and water to oil mass ratio 0.45. This illustrates that the by-product LPG is a better feed for ethylene production.