Conversion of metallurgical coke and coal using a Coal Direct Chemical Looping (CDCL) moving bed reactor

•Accumulated more than 300 operation hours were accomplished for the moving bed reducer reactor.•Different reactor operation variables were investigated with optimal conditions identified.•High conversions of sub-bituminous coal and bituminous coal were achieved without flow problems.•Co-current and counter-current contact modes were tested and their applicability was discussed.