Can a PO be automatically created/approved from an expense requisition (MRO)?

Does anyone know if you can automatically create PO's from MRO Req's?
We currently create MRO req's which go thru an approval hierarchy then once approved goes back thru another approval process. To approvers it's double the work.. The requisitions are already approved by the appropriate managers for services, and from a business stand point do not need to go thru another approval routing.

Are there any features of hte system we can utilize or other work-arounds?

Thanks,