Patent ID: 8512663

Claim:
A ceramic corrosion resistant pyrolysis reactor system comprising: a first reactor and a second reactor in flow communication with said first reactor, at least one of said first reactor and said second reactor comprising a refractory material comprising an yttria stabilized zirconia, said refractory material comprising at least 21 wt. % yttria based upon the total weight of said refractory material, wherein said refractory material comprises: (i) at least 20 wt. % of a first grain mode based upon the total weight of said refractory material, said first grain mode comprising yttria stabilized zirconia having a D50 grain size in the range of from 5 to 2000 μm, said first grain mode comprising at least 6 wt. % yttria based upon the weight of said first grain mode; and (ii) at least 1 wt. % of second grain mode having a D50 grain size in the range of from 0.01 μm up to not greater than one-fourth the D50 grain size of said first grain mode stabilized zirconia, based upon the total weight of said refractory material, said second grain mode comprising at least 14 wt. % yttria based upon the weight of said second grain mode.