Entrained flow reactor is the preferred route for large scale gasification of coal, petcoke and refinery residues because of high carbon conversion efficiencies and low tar production [22]. This mode of gasifier does not require inert bed material but relies on feeding the feedstocks co-currently with oxidizing agent at high velocity to achieve a pneumatic transport regime

[18]. At operating temperature of 1200-1500oC, this method is able to convert tars and meth­ane, resulting in better syngas quality [18]. Importantly this technology requires the feed­stocks to be pulverised into fine particles of ~50 |om before feeding, which is not a major issue for coal but very difficult and costly for biomass sources [18, 22].