Solucionado
<h:form rendered="#{usuarioLogado != null}">
<p:menuButton value="Menu">
<p:menuitem value="Livros" action="livro?faces-redirect=true" icon="fa fa-fw fa-edit" />
<p:menuitem value="Autores" action="autor?faces-redirect=true" icon="fa fa-fw fa-edit" />
<p:separator />
<p:menuitem value="Logout" action="#{loginBean.deslogar}" icon="fa-sign-out" />
</p:menuButton>
</h:form>
Fala ai Paulo, de boa?
Seu icone tá certo ali ?
é isso mesmo : fa fa-fw fa-edit ?
Me desculpe. Falha minha. Faltou a seguinte configuração:
In your web.xml add:
<context-param>
<param-name>primefaces.FONT_AWESOME</param-name>
<param-value>true</param-value>
</context-param>
In your *.xhtml where you would like to add FontAwesome icons, in between head tags point to the font-awesome css of the JAR that you have:
<h:outputStylesheet name="webjars/font-awesome/4.4.0/css/font-awesome.css">
Finally reference icons correctly e.g.
<p:button outcome="add-user-form" value="Add User" icon="fa fa-user-plus">
<f:param name="productId" value="10" />
</p:button>
`fonte: https://stackoverflow.com/questions/21052851/fontawesome-with-primefaces