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This Coal gasification has been investigated for several decades.  Recently,  coal  gasification  combined  cycle  power plants  have  been  identified  as  attractive  alternatives  for Since  wide  variations  occur generating  electricity’. among  coals,  knowledge  of  the  effect  of  coal  type  on gasification  is  important  for  future  gasification applications. Previous  investigations  of  coal  type  have dealt  mainly  with  demonstration  of particular  processes, and  have  not  attempted  to  determine  basic  coal  type effects. Coal properties  were  also  found  to  influence  gas composition,  especially  those  properties  which  affect reaction  temperature  (coal  HHV,  volatile  matter  content, and  moisture  content).  Higher temperature resulted in higher H, and CO concentrations.  Higher  feed  H/C  ratio (including  H  in  coal  moisture)  correlated  with  higher  H, concentration,  suggesting  that  some  of the  coal  moisture reacted  to  form  hydrogen.