@Destroyed(ConversationScoped.class)which is fired after the conversation is destroyed (see also http://docs.jboss.org/cdi/spec/1.2/cdi-spec.html#conversation_context) and the payload is conversation id (String) if the conversation context is not associated with a current Servlet request. However, the timeout is only a hint for the container. So a conversation does not necessarily have to be destroyed when the timeout occurs.
Thank you Martin!!!!