What are the advantages and disadvantages of intermittent gasification and continuous gasification?

Intermittent gasification furnaces feature mature process technologies and are easy to operate; they do not require oxygen for gas production nor an air separation unit. However, their biggest drawback is that they operate intermittently, resulting in low gasification efficiency, low thermal efficiency of the furnace, and a high carbon content in the slag. High standards are required regarding the quality of coal used. Continuous gasification technologies offer a variety of processes, are relatively more complex to operate, require sophisticated production equipment, and involve higher investment costs. Special air separation units are generally needed for gas production, but these technologies offer high gasification efficiency, high thermal efficiency of the furnace, and a lower carbon content in the slag. The requirements regarding coal quality vary depending on the specific gasification technology, but these technologies generally have strong adaptability.