WO2012011838A1 PCT/RU2011/000144 RU2011000144W WO2012011838A1 WO 2012011838 A1 WO2012011838 A1 WO 2012011838A1 RU 2011000144 W RU2011000144 W RU 2011000144W WO 2012011838 A1 WO2012011838 A1 WO 2012011838A1 Authority WO WIPO (PCT) Prior art keywords nitrogen argon methane gas synthesis Prior art date Application number …