Thus, if the matching reference blend is made up of 15% nheptane and 85% isooctane, the test sample is rated 85 motor or research octanenumber, according to the test method used.
In the reforming operation a light hydrocarbon feed isomerizes on contact with a suitable catalyst to produce gasoline with a higher octanenumber.
在重整操作中，一个轻质烃类进料与一个合适的催化剂接触而异构化得到具有高辛烷值的汽油。
3
It causes a knocking or pinging sound, robs the engine of power and, left unchecked, causes serious engine damage. Knock may be eliminated with the appropriate octanenumber.