Naphtha catalytic cracking to olefins over zirconia–titania catalyst

Abstract

The zirconia-titania based catalyst was synthesized by a co-participation method to study the catalytic cracking of heavy naphtha (dodecane) into high added-value chemical to olefins. The nanocrystal size catalysts were...

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

“…Thermal SC 27 is currently used on a large scale in the industry and produces LOs from light oil fractions (naphtha, light paraffins, middle distillate) or shale gas. SC is performed 28 without catalyst at high temperatures (>800 °C).…”

“…Yang 249 et al studied coke evolution in order to define a way to extend the SAPO-34 catalyst lifetime. They investigated the long-term effects of MTO conversion on the SAPO-34 zeolite exploiting 1D 27 Al or 31 P MAS NMR and 2D 31 P- 27 Al HETCOR MAS NMR spectroscopy, as well as XRD and DFT calculations. They first analyzed the coke effect: with its formation, the SAPO-34 unit cell is subjected to a reversible expansion.…”

Catalytic conversion of heavy naphtha to reformate over the phosphorus-ZSM-5 catalyst at a lower reforming temperature

“…4B showed the pore selectivity of parent ZSM-5 (P) favored the cyclization reaction to produce aromatic and naphthene products through the bimolecular reaction pathway 43 more than the monomolecular reaction products. The catalysts of 40% ZSM-5 in 60% binder followed different reaction pathways, and the pore selectivity of zeolite favored the monomolecular reaction through β-scission of dodecane 60,61 and promoted the formation of higher paraffin and olefin products. 43,47,61 Fig.…”

“…The catalysts of 40% ZSM-5 in 60% binder followed different reaction pathways, and the pore selectivity of zeolite favored the monomolecular reaction through b-scission of dodecane 60,61 and promoted the formation of higher paraffin and olen products. 43,47,61 Fig. 1S (ESI †) shows the schematic diagram of dodecane reforming through the carbonium ions via phosphate-modied ZSM-5 zeolite catalyst.…”

Bioglycerol-to-Propylene Routes: From Fundamental Catalysis to Process Design and Marketing

“…The largest source of propylene (∼42%) is the conventional SC of light oil fractions (naphtha, light paraffins, and middle distillate fuels) and the shale-gas used for producing ethylene, ,, where propylene is a byproduct with a yield of 1.6–18%. , SC is a highly endothermic process, which is carried out without a catalyst under steam at high temperatures of ∼800–1200 °C. The process energy consumption in a typical SC plant generally accounts for more than 70% of production costs, while CO 2 emissions may amount to 15 mT/ton of ethylene…”