Zeolitic Solid Acid Catalysts for the Alkylation of Isoparaffins with Olefins

通过烷基化过程，可以将较轻的异链烷烃 与小分子烯烃结合产生更重、更高辛烷值的 汽油组分。 这种轻质异链烷烃的烷基化， 通常为异丁烷，与烯烃，通常为丁烯或 丙烯，生产高辛烷值汽油组分，是一种 炼油厂操作中的重要过程。 目前 用硫酸或氟化氢进行， 催化剂的选择取决于具体条件， 要求。 环境和安全压力迫使 炼油厂，以取代腐蚀性，有毒或有害材料 更环保的材料。 硫酸工艺产生危险的污泥， 需要处理掉 爆炸危险， 有毒的蒸气云使得HF工艺不合需要。 新 使用固体酸催化剂的烷基化催化路线 因此正在开发中。 虽然已经研究了各种沸石作为潜在的 用于异丁烷与丁烯（或 丙烯），但尚未出现可行的商业方法 主要是因为催化剂的不可接受的快速速率 通过焦化失活。 PI将合成并 改性许多潜在可行的沸石催化剂， 高反应性和低焦化速率的特性，以及 将进行反应动力学和焦化研究 特色 然后他们会选出最有希望的 催化剂，并进行详细的反应器设计分析， 以识别最理想的工艺配置。

Through the process of alkylation, lighter isoparaffins can be combined with small olefins to produce heavier, higher octane gasoline components. This alkylation of light isoparaffins, typically isobutane, with olefins, typically butenes or propylene, to produce high octane gasoline components, is an important process in refinery operation. It is currently carried out with either sulfuric acid or hydrogen fluoride as the catalyst, the choice depending on specific conditions and requirement. Environmental and safety pressures are forcing refiners to replace corrosive, toxic or hazardous materials with more benign and environmentally acceptable materials. The sulfuric acid process produces a hazardous sludge which needs to be disposed of. The explosion hazard with resulting toxic vapor cloud makes the HF process undesirable. New catalytic routes for alkylation utilizing solid acid catalysts are therefore being developed. While various zeolites have been studied as potential catalysts for the reaction of isobutane with butenes (or propylene), no viable commercial process has yet emerged primarily because of the unacceptably rapid rate of catalyst deactivation through coking. The PIs will synthesize and modify a number of potentially viable zeolite catalysts with the properties of high reactivities and low coking rates, and will carry out a study of the reaction kinetics and coking characteristics. They will then select the most promising catalyst, and perform a detailed reactor design analysis in order to identify the most desirable process configuration.