Цепочка превращений CH4-->CO2--->C6H12O6--->C2H5OH--->CH3CHO--->CH3COOH--->(CH3COO)2Ca--->CaCO3--->CO2
CH4+2O2=CO2+2H2O 6CO2+6H2O=C6H12O6+6O2 C6H12O6=2C2H5OH+2CO2 C2H5OH+CuO=CH3CHO+Cu+H2O CH3CHO+Ag2O=2Ag+CH3COOH 2CH3COOH+Ca(OH)2=(CH3COO)2Ca+2H2O (CH3COO)2Ca+H2CO3=2CH3COOH+CaCO3 CaCO3=CaO+CO2