Hi Nisha,
Yes, you can use SRM-MDM Catalog with ECC. The installation is the same as if you would use it with SRM and you need a similar webservice customizing as you would need in SRM (call structure).
You may also check following SAP notes:
1766841 FAQ: Catalog integration in MM-PUR application
1092922 Using several catalogs in purchasing
For data replication tc. MDMGX can be used, or MECCM.
I hope this helps.
Regards,
Timea