Abstract: The present invention relates to a device comprising a thermobalance equipped with a detector (5) for measuring acoustic signals emitted by a sample (6) hanging from the balance beam and a preamplifier (2) incorporated in the vicinity of the head of the balance. The invention allows gas phase kinetic study of the degradation of materials and of depositions on these materials under temperature (100 to 1400° C.). In particular, corrosion phenomena such as: oxidation, sulfurization, carbonizing, metal dusting, nitriding, hydridation, chlorination, molten salt attack, and combinations of these degradations. Besides, deposits on the materials can be due to coking phenomena (carbon deposits), deposition of molten salts, volatile compounds condensation. The invention allows evaluation of the efficiency of inhibitors against corrosion and deposition processes.

Abstract: The present invention relates to a device comprising a thermobalance equipped with a detector (5) for measuring acoustic signals emitted by a sample (6) hanging from the balance beam and a preamplifier (2) incorporated in the vicinity of the head of the balance. The invention allows gas phase kinetic study of the degradation of materials and of depositions on these materials under temperature (100 to 1400° C.). In particular, corrosion phenomena such as: oxidation, sulfurization, carbonizing, metal dusting, nitriding, hydridation, chlorination, molten salt attack, and combinations of these degradations. Besides, deposits on the materials can be due to coking phenomena (carbon deposits), deposition of molten salts, volatile compounds condensation. The invention allows evaluation of the efficiency of inhibitors against corrosion and deposition processes.

Abstract: The invention relates to a catalyst that contains at least one matrix, at least one zeolite and at least one hydro-dehydrogenating element that is located at the matrix (deposited on the catalyst or contained in the matrix), in which the zeolite contains in its porous network at least one element of group VIB and/or group VIII. Said hydro-dehydrogenating element preferably belongs to group VIB and/or to group VIII of the periodic table. The catalyst contains at least one promoter element)phosphorus, boron, silicon).

Abstract: The invention relates to a catalyst that contains at least one matrix, at least one zeolite and at least one element that is deposited on the catalyst or contained in the matrix and selected from the group that is formed by the elements of groups VIB, VIII and VB, and at least one promoter element (phosphorus, boron, silicon), in which the zeolite contains in its porous network at least one element of group VB. The invention also relates to the use of this catalyst for the transformation of hydrocarbon fractions, in particular hydrorefining and hydrocracking.