Catalyst deactivation during hydrotreating coal-derived liquid and catalyst design concept for long life catalyst.

Catalyst deactivation

The fundamentals of catalyst deactivation are presented in this review. The chemico-physical aspects concerning the various deactivation causes (i.e. poisoning, sintering, coking, solid-state transformation, masking, etc.) have been analyzed and discussed, along with the mathematical description of the deactivation phenomena. # 1999 Elsevier Science B.V. All rights

Advances in Catalyst Deactivation and Regeneration

Heterogeneous Catalyst Deactivation and Regeneration: A Review

Deactivation of heterogeneous catalysts is a ubiquitous problem that causes loss of catalytic rate with time. This review on deactivation and regeneration of heterogeneous catalysts classifies deactivation by type (chemical, thermal, and mechanical) and by mechanism (poisoning, fouling, thermal degradation, vapor formation, vapor-solid and solid-solid reactions, and attrition/crushing). The key...

Catalyst deactivation during LCO upgrade to high - quality diesel Roberto

Diesel fuels of 50 and 15 ppm of sulfur content were produced in a pilot plant by upgrading light catalytic cracking gas oil (LCO) during 10 weeks of continuous operation. The end-of-run catalysts were characterized before and after soluble coke extraction by CH2Cl2. The cokes were characterized by CNMR, TPO, GC-MS, and elemental analysis. Catalyst surfaces were characterized by XPS, CO adsorpt...

Hydrotreating reactions of tall oils over commercial NiMo catalyst

Catalytic hydrotreating is an attractive method for upgrading bio-derived oils into renewable feedstocks with less oxygen content, suitable for producing valuable hydrocarbons through various petro-refinery processes. This study evaluates the catalytic activity of a commercial alumina (Al2O3) supported NiMo catalyst for hydrotreating tall oil feeds such as crude tall oil (CTO), distilled tall o...