Techno-economic performance of the coal-to-olefins process with CCS

Pore size effects in high-temperature Fischer–Tropsch synthesis over supported iron catalysts

“…In these processes, olefins are obtained as by-products; consequently, the selectivity to specific olefins is rather low. Alternatively, light olefins can be obtained using MTO (methanol-to-olefins) or SDTO (syngas via dimethyl ether to olefins) technology [9][10][11][12] which involve conversion of methanol or dimethyl ether, respectively, into olefins on zeolite catalysts. Methanol and dimethyl ether for these processes are obtained from syngas via the following reactions: CO + 2H 2 = CH 3 OH or 2CO + 4H 2 = CH 3 -O-CH 3 + H 2 O.…”

Exergetic evaluation of renewable light olefins production from biomass via synthetic methanol

“…(7)). The energetic efficiency of this biomass-olefins system is relatively higher than that of a simulated CTO system [5,29]. Many variables influence the system efficiencies, including the feedstock type, system configuration and operation parameters.…”

“…In the CTO system, however, a low-temperature Rectisol and a cryogenic high-purity distillation which require large energy consumption are employed, declining its energy efficiency. In addition, Po-Chuang Chen and Dong Xiang found that the energy efficiencies of individual coal-to-methanol and MTO are 77.70% and 80.98%, respectively [29,30]. Based on these data, an integrated coal-to-methanol-to-olefins process could own an energy efficiency of 62.92%, which is relatively higher than that of this biomass-olefins system.…”

Complex relationship between SAPO framework topology, content and distribution of Si and catalytic behaviour in the MTO reaction

“…The versatility of this technology is not restricted to the products, and also applies to the reactants since methanol can be produced from several carbon sources such as: coal, natural gas, biomass or even CO2. [5][6][7][8] Among the wide range of hydrocarbons that is possible to obtain from methanol, short chain olefins are specially demanded since they constitute one of the most important petrochemical intermediates, and actually the methanol to olefins (MTO) technology is ready for commercialization 5,9 and first production plants were set up in China in 2010. Small-pore silicoaluminophosphate (SAPO) molecular sieves can be efficiently used as MTO catalysts, providing exceptionally high selectivities to C2-C4 olefins.…”