Passivators　for　coke　were　made　of　boric　acid,　borax　and　aluminium　silicate　clay　in　different　proportions(boricacid,　1:0:1,　3:2:5,　2:1:7,　0:1:1,　borax).　The　kinetics　of　the　reaction　between　passivated-coke　and　CO2　was　studied　by　using　the　shrinking　unreacted　core　model,　and　a　relational　expression　of　reaction　kinetics　was　established.　The　kinetics　parameters　of　the　reaction　between　coke　passivated　by　using　different　proportion　passivators　and　CO2　were　calculated　by　the　relational　expression.　The　kinetics　parameters　and　resistance　in　various　steps　of　the　reaction　process　were　analyzed.　The　results　show　that　reaction　of　passivated-coke　with　CO2　is　consonant　with　the　shrinking　unreacted　core　model.　The　order　of　the　effects　of　different　passivation　on　the　passivated-coke　reaction　with　CO2　is　boricacid　>　2:1:7　>　1:0:1　>　3:2:5　>　0:1:1　>　borax　>　blank　and　the　effect　is　mainly　reflected　in　the　internal　diffusion.　The　passivated-coke　reaction　with　CO2　is　controlled　by　a　combination　of　chemical　reaction　and　internal　diffusion　in　the　initial　stage.　After　a　period　of　time,　the　reaction　is　mainly　controlled　by　the　internal　diffusion.