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Form coke reaction processes in carbon dioxide

机译：在二氧化碳中形成焦炭反应过程

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Uncertainty in metallurgical coke supplies has prompted development of form coke from low quality coals and fines. Reaction rates have been measured and mechanisms identified that control carbonaceous briquette reaction rate in CO_2. Three briquette formulations were prepared, characterized and coked in an inert atmosphere at high temperature. A given weight of each formulation was then reacted in a packed bed with CO_2 at 1373 K for 0.5-2h. Partially reacted briquettes contained a solid core with some internal reaction surrounded by a loosely adhering layer of carbon-containing ash. The reaction rate of briquettes with CO_2 was affected by diffusion of CO_2 through the bulk gas and the ash-carbon layer to the core surface, as well as CO_2-carbon reaction. Key variables governing briquette reaction rate included CO_2 mole fraction and briquette void fraction.
机译：冶金焦供应的不确定性促使劣质煤和粉矿形成了焦炭。已测量了反应速率，并确定了控制CO_2中含碳煤球反应速率的机理。制备了三种团块配方，进行了表征，并在惰性气氛中于高温下焦化。然后使给定重量的每种制剂在填充床中与CO_2在1373 K下反应0.5-2h。部分反应的团块包含一个实心核，内部反应被松散粘附的含碳灰分层包围。煤球与CO_2的反应速率受CO_2通过散装气体和灰分碳层扩散到核心表面以及CO_2碳反应的影响。控制团块反应速率的关键变量包括CO_2摩尔分数和团块空隙率。

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