Can a child be emancipated at 15 if no longer want to live with parents?

No. In states where you can seek emancipation by the courts you have to be at least 16 to apply and then be able to support yourself etc. All kids feel one time or another they want to move out. It's a part of growing up and not a reason for the court to emancipate you and leave you to fend for yourself. If you are abused in your home you can contact the CPS or police for help.