Clean Preparation of Formed Coke from Semi-coke by the Carbonated Consolidation Process

In order to address the low thermal efficiency of low-rank coal combustion and accompanying serious environmental issues, formed coke was prepared using a carbonization consolidation method with semi-coke. The test for briquetting carbonation conditions revealed that optimal parameters were pressure 93.63 MPa, moisture content 16%, Ca(OH)2 binder amount 10%, CO2 concentration 30% at 20 °C. Under these time 60 min, high-quality produced, exhibiting compressive strength 1256.2 N/a, redrying 286.2 dropping 10.6 number/a. characteristics investigated, revealing ignition temperatures (345.39 °C), burnout (495.57 peak maximum weight loss rate (437.93 °C) are slightly higher than those bituminous coal. calorific value briquette 20.4 MJ/kg. During process, emission concentrations SO2, NOX, solid particles from significantly lower coal, indicating it is cleaner energy source. Moreover, adding effectively reduced SO2 emissions achieved sulfur fixation reduction.