Latest Development on Membrane Fabrication for Natural Gas Purification: A Review

Table 1

Fossil fuel emission levels (pounds per billion Btu of energy input).

Fuel sources/pollutant; (pound/BTU)	Natural gas	Oil	Coal
Carbon dioxide	117,000	164,000	208,000
Carbon monoxide	40	33	208
Nitrogen oxides	92	448	457
Sulphur dioxide	1	1,122	2,591
Particulates	7	84	2,744
Mercury	0.000	0.007	0.016