Modification of HY zeolite by fluorine and its influence on olefin alkylation thiophenic sulfur in gasoline

The catalytic performance of a series of HY zeolites, modified by HF for olefin alkylation thiophenic sulfur (OATS) process, was evaluated. It was found that acid sites distribution could be controlled through the amount of HF. Under the optimized condition, activity, and selectivity of thiophene alkylation reaction in OATS could be greatly improved. At the same time, coking behavior was suppressed during the course.