ASTM D7206/D7206M - 19 - Standard Guide for Cyclic Deactivation of Fluid Catalytic Cracking (FCC) Catalysts with Metals
Maintenance will be taking place for BSI Shop on Saturday 6th March 2021 between 08:00 AM and 14:00 PM UK time. During this period, BSI Shop will be unavailable or may have limited functionality. Please do not make any purchases during these works. Please accept our apologies for any inconvenience caused during this essential maintenance.

ASTM D7206/D7206M - 19

Standard Guide for Cyclic Deactivation of Fluid Catalytic Cracking (FCC) Catalysts with Metals

Status : Current   Published : April 2019



1.1 This guide covers the deactivation of fluid catalytic cracking (FCC) catalyst in the laboratory as a precursor to small scale performance testing such as catalyst activities (Test Method D3907) or activities plus selectivities (Test Methods D5154 and D7964). FCC catalysts are deactivated in the laboratory in order to simulate the aging that occurs during continuous use in a commercial fluid catalytic cracking unit (FCCU). Deactivation for purposes of this guide constitutes hydrothermal deactivation of the catalyst and metal poisoning by nickel and vanadium. Hydrothermal treatment is used to simulate the physical changes that occur in the FCC catalyst through repeated regeneration cycles. Hydrothermal treatment (steaming) destabilizes the faujasite (zeolite Y), resulting in reduced crystallinity and surface area. Further decomposition of the crystalline structure occurs in the presence of vanadium, and to a lesser extent in the presence of nickel. Vanadium is believed to form vanadic acid in a hydrothermal environment resulting in destruction of the zeolitic portion of the catalyst. Nickel’s principle effect is to poison the selectivity of the FCC catalyst. Hydrogen and coke production is increased in the presence of nickel, due to the dehydrogenation activity of the metal. Vanadium also exhibits significant dehydrogenation activity, the degree of which can be influenced by the oxidation and reduction conditions prevailing throughout the deactivation process. The simulation of the metal effects that one would see commercially is part of the objective of deactivating catalysts in the laboratory. Catalyst deactivation by hydrothermal treatment only is addressed in Guide D4463/D4463M.

1.2 The two basic approaches to laboratory-scale simulation of commercial equilibrium catalysts described in this guide are as follows:

1.2.1  Cyclic Propylene Steaming (CPS) Method, in which the catalyst is impregnated with the desired metals via an incipient wetness procedure (Mitchell method) 2 followed by a prescribed steam deactivation.

1.2.2  Crack-on Methods, in which fresh catalyst is subjected to a repetitive sequence of cracking (using a feed with enhanced metals concentrations), stripping, and regeneration in the presence of steam. Two specific procedures are presented here, a procedure with alternating metal deposition and deactivation steps and a modified Two-Step procedure, which includes a cyclic deactivation process to target lower vanadium dehydrogenation activity.

1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.

1.4  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.

1.5  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.

Standard NumberASTM D7206/D7206M - 19
TitleStandard Guide for Cyclic Deactivation of Fluid Catalytic Cracking (FCC) Catalysts with Metals
Publication Date01 April 2019
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors cyclic deactivation, fluid catalytic cracking catalyst, hydrothermal treatment
File Size87 KB

 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents

Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version

Worldwide Standards
We can source any standard from anywhere in the world


Access, view and download standards with multiple user access, across multiple sites with BSOL