Coal/CO_2 Gasification System Using Molten Carbonate Salt for Solar/Fossil Energy Hybridization

摘要

The gasification of active carbon and coal with CO_2 (the Boudouard reaction: C＋CO_2=2CO) was studied using a molten salt (the mixture of K_2CO_3 and Na_2CO_3) at 1123 K to apply this system to solr energy conversion into chemical energy. On the solar/chemical energy hybridization system to obtain CH_3OH as a solar fuel, the coal with molten salt can directly gasify by the Boudouard reaction. The gasification reaction rate of active carbon and coal with CO_2 into CO was enhancedby 1.5 and 3.3 times in the presence of the molten salt, respectively, compared with the absence of the molten salt.