Synthesis and characterization of a catalytically active nickel silicoaluminophosphate catalyst for the conversion of methanol to ethene

A methanol to olefins review: Diffusion, coke formation and deactivation on SAPO type catalysts

“…Incorporating metal into the SAPO framework has been recognized as a way of improving the olefin selectivity and prolonging the catalyst life time since the reports from Inui and Kang [100,101], as part of the large research efforts on metallosilicates [102][103][104] in his group. Various Me-APSO-34 (Me@Ni [85,101,[105][106][107][108][109][110][111][112][113][114][115][116][117][118][119][120][121], Co, Mn, Fe [106,109,113,114], Cu [79] and Ti, Cr, Cu, Zn, Mg, Ca, Sr, and Ba [119,121]) have been tested in MTO. Incorporating metals into the framework of zeolites has proven to reduce the acid density, leading to a higher selectivity to ethylene, reduced coke formation and thus higher catalyst life time [85,101,121].…”

Nanosheets of Ni‐SAPO‐34 Molecular Sieve for Selective Oxidation of Cyclohexanone to Adipic Acid

“…[11] The results of X-ray absorption near-edge structure (XANES) shown in an insert blue square of Figure 3b indicate differences in the chemical environment of nickel in NSÀ Ni-SAPO-34 and reference samples of Ni foil, NiO and NiCr 2 O 4 . [12] The NSÀ Ni-SAPO-34 shows a pre-edge feature suggesting the Ni in nanosheets is neither in simple oxide state nor simple Ni-OÀ Ni tetrahedral geometry, giving rise to the nickel incorporated into the framework of the molecular sieve. The k 3 -weighted extended Xray absorption fine structure (EXAFS) data (Figure 3b and Supporting Information, Figure S10) also reveal the same nickel state as prevailed in XPS measurements.…”

Zeotype SAPO‐34 Synthesized by Combination of Templates for the Gasification of Biomass

“…Doping transition metals into the SAPO‐34 framework increases ethylene selectivity in the MTO process , . This is due to structural distortion and acidity modification caused by metal incorporation.…”