Low Sulfur Low Olefin Gasoline Production by RIDOS Technology

摘要

A major source of air pollution worldwide is the exhaust from fuel combustion. Experimental data show that reducing sulfur and olefin content in gasoline may be one of the best ways to improve automobile emissions. The sulfur and olefin content in gasoline will be limited to less than 200ppm and 30v%, respectively, in China from 2003. More restrictive standards less than 150 ppm of sulfur and 18v% of olefin will be required for Beijing. The components of the gasoline pool in a refinery vary from case by case. FCC naphtha in gasoline pool contributes about 75 ～ 80% in China comparing with 40 percent in the United States. On the other hand, approximately 90 ～ 98% of the sulfur and nearly all the olefin in the pool are from FCC naphtha. The olefin content in most of FCC naphtha is higher than 40v%. There are several technologies reported for producing low sulfur FCC gasoline, considering the capital investment and other factors, post-treating process becomes desirable schedule for achieving sulfur and olefin reduction in the pool. RIPP developed a new technology named RIDOS to provide low sulfur and low olefin gasoline. The key of the process is how to make up the octane loss for olefin reduction.