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美国近年来颁布了严格的汽车排放标准,降低了汽油中芳香剂的允许含量。这一环保措施,迫使汽车工业界把注意力集中到研制新的汽油添加剂上。美国Ethyl公司最近进行的车队试验证明,三碳酸锰甲基环戌烷(Methylcyclopentadenyl Mallgallese Tricarbonyl,简称MMT)不但能够改进燃料辛烷值,而且可以降低汽车尾气中排放污染物。这项试验是在48辆汽车上进行对比试验,汽车分别燃烧含MMT汽油和不含MMT的汽油,在12 068km(75 000英里)行程内每8 045km(5 000英里)进行一次尾气分析,然后对收集到的各项数据进行精确统计,确定这种添加剂对尾气成份和汽车性能的影响。试验证明,当加入MMT的无铅汽油中锰含量达到每升0.0132克(每加仑0.02125克)时,燃料显示良好性能: 1.燃料辛烷值增加为:普通汽油0.9,高级汽油0.5～0.6,这一增益足可以补偿芳香剂含量下降而引起的辛烷值损失。 2.每辆汽车尾气排放污染物减少7.8％,按此计算1995年全美国汽车尾气排放污染物总量将可减少7.2574×10~8kg(16×10~8磅)。
The United States has promulgated stringent vehicle emission standards in recent years, reducing the allowable content of aromatics in gasoline. This environmental measure forced the automotive industry to focus on the development of new gasoline additives. Recent test drive tests by Ethyl Corporation of the United States have shown that Methylcyclopentadenyl Mallgallese Tricarbonyl (MMT) not only improves fuel octane rating but also reduces pollutant emissions from the vehicle exhaust. The test was conducted on 48 vehicles that burn off gas with and without MMT respectively and perform an exhaust analysis every 8,045 km (5,000 miles) over 12,068 km (75,000 miles) and then The collected data for accurate statistics to determine the additive on the composition of exhaust and automotive performance. Experiments have shown that when the manganese content of MMT unleaded gasoline reaches 0.0132 grams per liter (0.02125 grams per gallon), the fuel shows good performance: 1. The fuel octane increases are: normal gasoline 0.9, advanced gasoline 0.5 to 0.6, This gain is sufficient to compensate for the octane loss caused by a decrease in fragrance content. 2.Each vehicle emissions reduced by 7.8%, according to this calculation in 1995 the United States vehicle exhaust emissions will reduce the total amount of 7.2574 × 10 ~ 8kg (16 × 10 ~ 8 pounds).