The Catalytic Conversion of Methyl Chloride to Ethylene and Propylene over Phosphorus-Modified Mg-ZSM-5 Zeolites

New route for light olefins production from chloromethane over HSAPO-34 molecular sieve

“…ZSM-5 has been proved to be the most successful catalyst in chloromethane transformation compared with Y, Beta, MOR and EMT zeolites [4,7]. For ZSM-5, usually the products in C 3 -C 6 boiling range are the main products, similar to the product distribution of ZSM-5 catalyzed MTG process.…”

“…In a very recent publication, ethylene and propane appeared as the main products with cationic exchanged ZSM-5 [5,6]. P or Mg modified ZSM-5 catalysts were used in Sun's study and the transformation gave an alternative products distribution with remarkable propylene and butenes generation [7]. Here SAPO-34, with 8-ring pore opening and medium acidity demonstrates its interesting behavior, such as high selectivity for light olefins production, similar to its excellent performance in MTO process [11,12].…”

“…The corrosion problem of the produced HCl can be resolved. For the chloromethane transformation, compared with other large pore zeolite catalysts, both cationic and protonic ZSM-5 appeared to be the most promising catalyst due to their high activity and long life in the reaction and a strong reduction in the coke formation [4][5][6][7][8][9]. All above studies indicated that, just as the well known MTO or MTG process, chloromethane transformation to higher hydrocarbons could be a potential and an efficient alternative route for methane utilization.…”

Zeolite-supported iron catalysts for allyl alcohol synthesis from glycerol

“…Catalyst acidity has been correlated with acrolein formation, while basicity was shown to drive the reaction towards allyl alcohol formation [5,7]. Zeolite acidity can be typically reduced by dealumination [8,9], modification with phosphorus [10], alkali treatment [11], alkali metal exchange [12] amongst other methods. In the present research, we have modified the acidity of an iron-exchanged zeolite via rubidium deposition, aiming to enhance the rate of formation of allyl alcohol from glycerol.…”

Highly Efficient and Selective CH Activation in Gallium‐Containing Molten‐Salt Systems

“…In the following years, different types of zeolite catalysts were applied in this kind of chloromethane transformation, showing different performance with respect to catalytic activity, coke formation, and the distribution of hydrocarbons produced. [8][9][10][11][12] Recently, the application of SAPO-34-type molecular sieve catalysts was found to be promising (SAPO = silicon aluminum phosphates). With this type of catalyst, light alkenes (ethene, propene, butenes) can be produced at temperatures of 350-500 8C in 70-80 % selectivity in a temperature-dependent mix in which the maximum selectivity for one individual product hardly reaches 45 %.…”