28990
In order for any material to be considered in a post - combustion carbon capture technology , it must have high working capacities of CO2 from flue gas and be regenerable using as little energy as possible .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None