Performance improvement of PVDF hollow fiber-based membrane distillation process

▶ Both plasma and chemically modified PVDF membranes showed improved properties. ▶ These modified PVDF membranes performed more stably in MD process. ▶ A critical fiber length existed to assure adequate MD performance. ▶ Higher shell-side Re is preferred to improve mixing condition in larger MD modules. ▶ The overall MD coefficient decreased with increasing packing density.