1.1 本试验方法包括测定平衡或实验室失活的流化催化裂化（FCC）催化剂的活性和选择性。根据微活性装置中柴油进料的质量百分比转换来评估活性。根据柴油进料催化裂化产生的特定产品的质量百分比产率来评估选择性。 1.2 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。 本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 微活性测试提供了评估催化裂化催化剂相对性能的数据。由于结果受催化剂预处理、原料特性、测试设备和操作参数的影响，因此遵守本测试方法是正确解释结果的先决条件。 实际使用的仪器、试验条件和分析程序应与本试验方法中描述的非常相似。仪器、测试条件和/或分析程序的重大变化可能导致活性和选择性数据与其他实验室针对相同催化剂/原料样品开发的数据不相关。 5.2 标准方法反应温度为516 °C[960 °F]。可以使用其他反应温度；然而，催化剂选择性数据是在516以外的温度下得出的 °C[960 °F]可能与在516处开发的选择性数据无关 °C[960 °F]。此外，与在516处获得的数据相比，在其他反应温度下的精度可能会发生变化 °C[960 °F]。

1.1 This test method covers determining the activity and selectivity of either equilibrium or laboratory deactivated fluid catalytic cracking (FCC) catalysts. The activity is evaluated on the basis of mass percent conversion of gas oil feed in a microactivity unit. The selectivities are evaluated on the basis of mass percent yields of specifically defined products resulting from the catalytic cracking of gas oil feed. 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The microactivity test provides data to assess the relative performance of FCC catalysts. Because results are affected by catalyst pretreatment, feedstock characteristics, test equipment, and operating parameters, adherence to this test method is a prerequisite for correct interpretation of results. Apparatus, test conditions, and analytical procedures actually used should closely resemble those described in this test method. Significant variations in apparatus, test conditions and/or analytical procedures may result in activity and selectivity data which do not correlate with data developed by other laboratories on identical catalyst/feedstock samples. 5.2 The standard method reaction temperature is 516 °C [960 °F]. Other reaction temperatures can be used; however, catalyst selectivity data developed at temperatures other than 516 °C [960 °F] may not correlate with selectivity data developed at 516 °C [960 °F]. Also, precision at other reaction temperatures may change compared to data obtained at 516 °C [960 °F].