Help with Statement of Purpose for MS in Engineering and concentration in chemical engineering!!

[Brooke90]

I have been searching the internet for examples of a statement of purpose. I have a BS in Chemistry and I am currently working for a power plant full time. This has sparked an interest in chemical engineering for me. I am applying to NCSU's online Master's of engineering degree with a concentration in chemical. I want to write a sufficiant statement of purpose and would like help and suggestions. I have a 3.77 GPA from undergrad and was awarded scholarships and awards for my academic excellence and graduated Magna Cum Laude. However, I do not have any engineering research or projects. I have research experience studying the ontogenetic shift of a lionfish using stable isotopes and I interned for the power plant I currently work for, but i don't know if that would be sufficient enough. Can anyone give me ideas and suggestions on how to write a great Statement of purpose for engineering school coming from a chemistry background? Since I don't have an engineering background, I am not quite sure what admissions would be looking for in a personal statement.

Thanks in advance!