Carbondioxide（CO2）captureusingmagnesiumoxide（MgO）-basedadsorbentsatintermediatetemperatureshasbeenregardedasaveryprospectivetechnologyfortheirrelativelyhighadsorptioncapacity,lowcost,andwideavailability.Duringthepastfewyears,greatefforthasbeendevotedtothefabricationofmoltensalts-modifiedMgO-basedadsorbents.TheextraordinaryprogressachievedbycoatingwithmoltensaltsgreatlypromotestheCO2capturecapacityofMgO-basedadsorbents.Therefore,wefeelitnecessarytodeliveratimelyreviewonthistypeofCO2capturingmaterials,whichwillbenefittheresearchersworkinginbothacademicandindustrialareas.Inthiswork,weclassifiedthemoltensaltsmodifiedMgOadsorbentsintofourcategories:（1）homogenousmoltensalt-modifiedMgOadsorbents,（2）moltensalt-modifieddoublesalts-basedMgOadsorbents,（3）mixedmoltensalts-modifiedMgOadsorbents,and（4）moltensalts-modifiedMgO-basedmixedoxidesadsorbents.Thiscontributioncriticallyreviewstherecentdevelopmentsinthesyntheticmethod,adsorptioncapacity,reactionkinetics,promotionmechanism,operationalconditionsandregenerabilityofthemoltensalts-modifiedMgOCO2adsorbents.Thechallengesandprospectsinthispromisingfieldofmoltensalts-modifiedMgOCO2adsorbentsinrealapplicationsarealsobrieflymentioned.
