Catalytic Partial Oxidation of Methane to Syngas and the DME Synthesis from the Syngas Containing N2 we try to use air instead of pure oxygen for a syngas production by CPO without an air-separation installation. The key question induced by air CPO is whether the syngas containing N2 could be effectively used for the downstream product synthesis. For methanol synthesis, since a great deal of feedstock needs to be recycled for its low single pass conversion, the existence of N2 which causes a large increase of compression cost of gases, is clearly unfit for its requirement. But for dimethyl ether, A great deal of experimental results have provided that the single pass CO conversion could be reached to 90% over many kinds of catalysts, which means the feedstock gases no longer need to be recycled. Therefore, we have done a lot of work on an integration of the air CPO with the DME synthesis from syngas containing N2, and to see whether it could offer a cheaper route for DME production.

Catalytic Partial Oxidation of Methane and Air The effects of temperature on catalytic activities T/℃ CH4 CO2 H2O CO H2 N2 500 14.43 7.69 25.09 0.60 9.66 42.53 550 12.79 7.96 22.72 1.39 13.70 41.45 600 10.74 7.88 20.17 2.80 18.32 40.09 650 8.33 7.30 17.65 4.94 23.28 38.51 700 5.78 6.33 15.34 7.56 28.17 36.82 750 3.46 5.24 13.45 10.16 32.41 35.29 800 1.74 4.31 12.17 12.20 35.43 34.15 850 0.75 3.65 11.56 13.50 37.05 33.50 (CH4/Air/H2O=1/2.4/0.8，0.8MPa) The effects of H2O/CO2 ratios on catalytic activities R CH4 CO2 H2O CO H2 N2 12/0 0.44 4.43 15.85 11.67 36.19 31.42 11/1 4.93 15.50 12.80 34.87 31.45 10/2 0.46 5.38 14.95 14.03 33.80 31.39 9/3 0.45 5.89 14.57 15.17 32.51 31.41 8/4 0.43 6.48 14.31 16.23 31.10 31.46 (R=H2O/CO2，850℃，1MPa，(H2O+CO2)/ CH4 =1.2/1)

DME Synthesis from the Syngas Containing N2 CH4 The catalyst stability for CPO of methane with air (850℃，0.8MPa，Natural gas/Air/H2O/CO2＝1/2.4/0.8/0.4) DME Synthesis from the Syngas Containing N2 7.0MPa The influence of temperature on catalytic properties

The influence of space velocity on catalytic properties 5.0MPa 5.0MPa The catalyst stability for DME synthesis

Electricity Catalytic Combustion CH4 Air DME Synthesis Reactor Syngas (N2) Compressor Tail gas H2O H2O DME Compressor CO2 CO2 The process of DME synthesis from syngas obtained by catalytic partial oxidation of methane with air

Catalytic Partial Oxidation of Methane in Fluidized Bed Reactor The temperature profiles in fluidized bed The results of CPO in fluidized compared with the data calculated by thermodynamic

The results of catalytic oxidation of methane along catalyst bed The comparison of the results of carbon deposition in fixed bed and fluidized bed

The catalyst stability for CPO in fluidized bed The results of catalytic oxidation of methane and methane reforming with carbon dioxide along catalyst bed The catalyst stability for CPO in fluidized bed