Emissions of Greenhouse Gases in the United States 1997 - Table 21. U.S. Methane Emissions from Industrial Processes, 1990-1998

Table 21. U.S. Methane Emissions from Industrial Processes, 1990-1998
(Thousand Metric Tons of Methane)

Source	1990	1991	1992	1993	1994	1995	1996	1997	P1998
Chemical Production
Ethylene	17	18	19	19	20	19	21	22	23
Ethylene Dichloride	3	2	3	3	3	3	3	4	4
Styrene	15	15	16	18	20	21	22	21	21
Methanol	8	8	7	10	10	10	11	11	11
Carbon Black	14	13	15	16	16	17	17	17	18
Total	56	57	60	66	70	70	74	75	77
Iron and Steel Production
Coke^a	11	9	9	9	8	9	8	7	7
Sinter	6	5	6	6	6	6	6	6	6
Pig Iron	45	40	43	43	44	46	44	45	43
Total	62	54	57	58	59	61	59	58	56
Total Industrial Processes	117	111	117	124	129	131	132	132	133
^aBased on total U.S. production of metallurgical coke, including non-iron and steel uses. P = preliminary data. Note: Totals may not equal sum of components due to independent rounding. Sources: American Iron and Steel Institute, Annual Statistical Report (Washington, DC, various years); Chemical Manufacturers Association, U.S. Chemical Industry Statistical Handbook (Washington, DC, various years); and Intergovernmental Panel on Climate Change, Greenhouse Gas Inventory Reference Manual: Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories, Vol. 3 (Paris, France, 1997), p. 2.23, web site www.iea.org/ipcc/invs6.htm.