Abstract:　Continuous　preparation　of　carbon　nanoparticles　by　dielectric　barrier　discharge　(DBD)-induced　non-thermal　plasma　arc　discharge　with　large　spacing　in　a　modified　fluidized　bed　is　presented.　Discharge　arc　is　generated　via　the　inducement　of　DBD　which　provides　conductive　media　in　order　to　realize　a　large　spacing　arc　discharge.　Three　kinds　of　flow　conditions　defined　as　full　circulation,　fluidized　dynamic　equilibrium,　and　full　collection　are　determined　by　the　relationship　of　critical　fluidized　velocity　and　the　real　gas　velocity　after　some　modification　of　the　fluidized　bed.　Movement　model　of　carbon　nanoparticles　has　been　proposed　to　illustrate　the　flow　conditions.　A　visualized　and　comprehensive　refinement　of　aggregating　processes　has　been　exhibited　and　proved　by　high-resolution　transmission　electron　microscopy.　Simplified　equivalent　electrical　conductive　model　of　the　arc　discharge　system　is　successful　to　generally　and　perspicuously　figure　out　the　discharge　process　which　is　impeded　by　the　generated　carbon　nanoparticles.　Effects　of　flow　conditions　and　flow　ratio　of　carrier　gas/carbon　source　on　morphology　and　yield　of　nanoparticles　have　been　analyzed　by　morphology　observation　and　yield　calculation　along　with　modeling　the　process.　Graphical　Abstract:　[Figure　not　available:　see　fulltext.]　©　2016,　Springer　Science+Business　Media　Dordrecht.