National Transport Library Research Database

Grundläggande mekanismer för katalytisk enstegssyntes av dimetyleter (DME)

  • Chalmers tekniska högskola AB, Universitet eller högskola, 556479-5598
Sponsors, duration, budget: Energimyndigheten ; 2010-01-01 -- 2013-12-31 ; 2130000 kronorRegistration number:
  • Energimyndigheten 2010000425
Subject(s): Abstract: Syftet med projektet är att undersöka de grundvetenskapliga mekanismerna för katalytisk enstegssyntes av DME från syntesgas, med användandet av en blandning av Cu/ZnO/Al2O3 och fosformodifierad alumina som katalysator. Projektet har hög grundforskningskvalitet och hög energirelevans.Abstract: The objective with this project is to investigate the fundamental mechanisms for catalytic single step synthesis of DME from synthetic gas (CO+CO2+H2), produced from black liquor. Further, we will continue to develop the methodology for detailed kinetic models. The models will predict the rate-determining step and give a deep understanding of the reaction mechanisms. This is a general concept that can be used for many applications. The strong point of this work is the synergy effects of combining micro calorimetry, mass spectrometry, FTIR and kinetic modeling. We will use Cu/ZnO/Al2O3 and phosphorus modified alumina as catalyst. It has been observed that the transient methanol production on Cu/ZnO/Al2O3 is influenced by the pretreatment. But, how does the heat of adsorption (DH) changes when the pretreatment varies? Is it DH for H2 that gives this beneficial effect? Or maybe CO2? How do the lateral interactions change? This is today unknown and will be investigated in this project. In addition, we will examine the effect of phosphorus modifying the alumina and how it influences the energies. We will use in-situ FTIR for examining the surface species. The results from the experiments will be used for developing detailed kinetic models. The significance of this project is: (i) method that can reduce the global warming (ii) increase the fundamental knowledge about the mechanisms for DME synthesis (iii) continue to develop the methodology for detailed kinetic modeling.
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