These items must be sent through the Graduate College online application.

GRE scores are NOT required
Statement of purpose-indicating the academic and professional goals you hope to achieve in pursuit of this program of study. This is an essay where you describe your background, research interests and career goals, as well as your reasons for applying to our graduate program. See instructions in the online application that will help guide you as you write your essay.
Unofficial electronic copies of transcripts from previous academic work. Official Transcripts will be required prior to matriculation. Applicants should have a Bachelor's degree in chemical engineering, chemistry, physics, materials science or petroleum engineering for admission into the program, with a minimum GPA of 3.0/4.0. Previous coursework should include math through differential equations, kinetics, mass transport and thermodynamics. Applicants lacking in some area at the time of application may provide a plan to gain competence in these areas in their Statement of Purpose.
Resume-publications and time spent in a research lab make a much stronger application.
For international applicants, official scores from TOEFL, IELTS, PTE, CEFR or other accepted English Proficiency exam. See below for exemptions to this requirement.
Minimum of three letters of recommendation

Academic transcripts
GRE test scores
Chemical Engineering – GRE test scores are not required for full consideration of application.
Environmental Engineering – GRE test scores are optional and not required for consideration of application.
For international students whose native language is not English, TOEFL or IELTS scores dated no more than two years before the term of application
IELTS composite score of at least 7 with no subject area falling below 6
TOEFL minimum score of 79 for the Internet exam and 550 for the paper exam
Three letters of recommendation
Statement of purpose
Resume