Hi

Colleges offering Btech in chemical engineering in  kerela are

1. NIT,  Calicut

Entrance:  JEE main 

2. Cochin university of science and technology

Entrance:  KEAM

3. TKM college of engineering,  kollam

Entrance:  KEAM

4. Government Engineering College,  Thrissur

Entrance:  KEAM

5. Government engineering college

Entrance:  KEAM 

For more info go through below link 

https://engineering.careers360.com/colleges/list-of-chemical-engineering-colleges-in-kerala