The civil clean coke is a low pollution emission clean fuel obtained by high-temperature pyrolysis of coal and multi-functional additives. It is of great significance to solve the air pollution problem caused by civil bulk coal burning. However

the high ignition temperature and poor combustion performance of civil clean coke in the early stage restricted its further promotion and application. By taking Luliang fat coal as the research object

coke samples were prepared by high-temperature pyrolysis with different additives

the TG-DTG

BET and thermodynamics method were used to analyze the influence of Na_2CO_3 on the combustion performance of civil clean coke. The results show that

the civil clean coke obtained by high-temperature pyrolysis via adding 1.0% Na_2CO_3 with impregnation method

the ignition temperature reduced by 53 K. The TG and DTG curves of coke added Na_2CO_3 shifted to the left significantly

the average combustion rate increased from 0.38 mg/min to 0.75 mg/min

and the comprehensive combustion index increased from 2.01×10~(-10) mg~2/(min~2·K~3) to 11.14×10~(-10) mg~2/(min~2·K~3). The specific surface area of the coke added Na_2CO_3 significantly increased and the pore structure was more developed

which further promoted the oxygen transfer process of combustion and significantly decreased the apparent activation energy of the combustion system. The apparent activation energy of the combustion system decreased from 454.28 k J/mol to 306.85 k J/mol in low temperature region

and 557.36 k J/mol to 95.36 k J/mol in high temperature region. The combustion performance of civil clean coke is obviously improved.