grain mass/grain是什么(催化剂)? i cannot find "carrier" in the text you provided. but the "matrix" refers to a porous material on the internal surface of which catalytic material is deposited or catalytic reaction occurs. for instance, for pt/al2o3 catalysts, the matrix can be al2o3 or the whole thing. normally, people use porous media, porous material or porous support. it is just another way to say the same thing. sometimes, you want to avoid repetition in your paper. 催化剂载体 is catalyst support. carrier is not used for that purpose. carrier gas is used for chromatography. we use the same chinese character 载, which is different in english in two situations.查看更多