To delete a second Facebook account with the same email: Log in to that particular account, click on the 'Down arrow icon' from the top right corner, click the 'Settings & privacy' option, click on 'Settings' > 'Your Facebook information' > 'View' next to the 'Deactivation and deletion' option, choose the 'Delete account' option, click on the 'Continue to account deletion' > 'Delete Account' options, type your Facebook account password and click on 'Continue', and lastly, click on 'Delete account' from the popup to confirm the deletion process.