FIELD: chemistry.
SUBSTANCE: described is purifying from disperse particles material, used for filter-catalyst for purification from disperse particles, and filter-catalyst is located on the way of flow of exhaust gases of internal combustion engine, catching disperse particles in exhaust gases, which are formed in internal combustion engine, and burning precipitated disperse particles in order to be regenerated, and purifying from disperse particles material includes: oxide, containing cerium (Ce), possessing ability to accumulate-release oxygen; and at least one metal (Me), selected from group, consisting of zirconium (zr), yttrium (Y), lanthanum (La), praseodymium (Pr), strontium (Sr), nioubium (Nb) and neodymium (Nd), and ratio of content of (Ce:Me) cerium to metal constitutes from 6:4 to 9:1 in units of atomic ratio, and degree of crystallinity (CR), represented by the following formula (1), lies within the range 36-60%: Degree of crystallinity (CR)=I/I0× 100(%) (1), where I represents intensity of X-ray diffraction peak with respect to plane (111) of phase CeO2 in purifying from disperse particles material, and I0 stands for intensity of X-ray diffraction peak with respect to plane (111) of phase CeO2 after roasting material, which purifies from disperse particles, in the air at 1000°C. Described is filter-catalyst for purification from disperse particles, which is located on the way of flow of exhaust gases of internal combustion engine, catching disperse particles in exhaust gases, which are formed in internal combustion engine, and burning precipitated disperse particles in order to be regenerated, and filter-catalyst includes: filter-carrier, made from porous ceramics with continuous small pores; and layer of catalyst, formed on the wall of filter-carrier, and catalyst layer contains: 25-100 g/l of mixture of described above purifying from disperse particles material and noble metal; and 0.25-1.0 g/l of noble metal, counted per unit of volume of filter-carrier. Described is method of regeneration of described above filter-catalyst, including control of internal temperature of filter-catalyst at the level from 350°C to 800°C, thus ensuring burning and removal of disperse particles, precipitated on filter-catalyst.
EFFECT: obtaining efficient material, purifying from disperse particles.
10 cl, 4 tbl, 7 dwg, 24 ex
