The methyl halide to hydrocarbon reaction over H-SAPO-34

Methyl Halide to Olefins and Gasoline over Zeolites and SAPO Catalysts: A New Route of MTO and MTG

“…5 indicated that, with more metal incorporated into the framework, Si island predominant formed and caused lowered acid density of MeAPSO-34 [37]. A relevant work published by Svelle and co-workers in 2006 reported methyl chloride and methyl bromide conversion over SAPO-34 catalyst [41]. Figure 6 gives the MeBr conversion versus time on stream at 300-450 o C and product selectivity at 450 o C. Comparative experiments were performed using methanol to elucidate whether the activity of reactant could change the product selectivity over an identical catalyst.…”

“…Most of these work presented the product distribution in gasoline range from methyl halide conversion. In some recent studies, with the application of SAPO-34 molecular sieves, which has been proved to the most excellent MTO catalyst, methyl halide could be transferred to hydrocarbons with extremely high selectivity for light olefins, such as ethylene, propylene, and butenes [32][33][34][35][36][37][38][39][40][41][42][43]. The structure of zeolites and SAPOs discussed in this review is listed in Table 1.…”

“…SAPO-34 was employed as the catalyst for chloromethane conversion for the first time by Wei and co-workers [32] and presented high activity and selectivity for the production of light olefins [33][34][35][36][37][38][41][42][43]. In the 350-500 ºC temperature range, choloromethane was converted to ethylene, propylene, and butylenes with 70%-80% selectivity for C 2 -C 4 olefins (Fig.…”

“…The catalytic performance with efficient conversion and high light olefins selectivity proved that SAPO-34 was very excellent catalysts for the transformation of methyl halide to light olefins [32][33][34][35][36][37][38][39][40][41][42]. Methyl chloride conversion over acid catalyst SAPO-34 was also studied with in situ FT-IR [33,39] and three shifts of Si(OH)Al caused by three interaction between hydroxyl group and adsorbed species of reactant and products, such as chlormethane, alkenes and HCl, were detected.…”

Molten salt chemical looping for reactive separation of HBr in a halogen-based natural gas conversion process

“…An alternative pathway for methane partial oxidation using bromine, rather than oxygen, has been demonstrated and piloted [5][6][7][8][9]. Bromine can be generated from the reaction of oxygen with hydrogen bromide (HBr), or from many solid metal bromides (MBr 2 ), (reaction 1).…”