
NEW YORK, May 22 (Reuters) - Exxon Mobil XOM.N was operating the catalytic cracker unit at its 275,000 barrel-per-day Joliet, Illinois refinery at reduced rates earlier this week, IIR Energy said on Thursday.
The refinery ran its 98,000-bpd catalytic cracker unit at approximately 50% capacity due to unspecified mechanical issues, the industry monitor said.
A spokesperson at Exxon Mobil did not respond to a request for comment.
The company said on Tuesday it was working to resolve an operational issue at the Joliet refinery.