该方法用于测定挤压催化剂的填充表观体积密度。该方法适用于符合以下近似尺寸的催化剂:最大直径为3.2毫米（1/8英寸），最大平均长度为9.5毫米（3/8英寸），最大单个长度为15.9毫米（5/8英寸）。表观堆积密度（简称ABD）是一个经验值，定义为单位体积重量。可使用UOP方法563“分子筛的填充表观体积密度”测定分子筛的填充ABD，该方法解决了材料的亲水性。

This method is for determining the packed apparent bulk density of extruded catalysts. The method is applicable to catalysts conforming to the following approximate dimensions: a maximum diameter of 3.2 mm (1/8 inch) and a maximum average length of 9.5 mm (3/8 inch), with a maximum individual length of 15.9 mm (5/8 inch). Apparent bulk density, referred to as ABD, is an empirical value defined as weight per unit volume. The packed ABD of molecular sieves can be determined using UOP Method 563, “Packed Apparent Bulk Density of Molecular Sieves,” which addresses the hydrophilic nature of the material.