Hits:

Indexed by:期刊论文

Date of Publication:2018-05-01

Journal:PLASMA SOURCES SCIENCE & TECHNOLOGY

Included Journals:SCIE

Volume:27

Issue:5

ISSN No.:0963-0252

Key Words:electric field enhancement; plasma generation; plasma catalysis; different pore shapes

Abstract:Plasma generation inside catalyst pores is of utmost importance for plasma catalysis, as the existence of plasma species inside the pores affects the active surface area of the catalyst available to the plasma species for catalytic reactions. In this paper, the electric held enhancement, and thus the plasma production inside catalyst pores with different pore shapes is studied with a two-dimensional fluid model. The results indicate that the electric held will be significantly enhanced near tip-like structures. In a conical pore with small opening, the strongest electric held appears at the opening and bottom corners of the pore, giving rise to a prominent ionization rate throughout the pore. For a cylindrical pore, the electric held is only enhanced at the bottom comers of the pore, with lower absolute value, and thus the ionization rate inside the pore is only slightly enhanced. Finally, in a conical pore with large opening, the electric held is characterized by a maximum at the bottom of the pore, yielding a similar behavior for the ionization rate. These results demonstrate that the shape of the pore has a significantly influence on the electric held enhancement, and thus modifies the plasma properties.