Boxes

Box 3.1 CO2 recovered for industrial gas 3.14

Box 3.2 Double counting 3.16

Box 3.3 Urea production 3.16

Box 3.4 Double counting 3.40

Box 3.5 Allocation of emissions from CaO production 3.41

Box 3.6 Double counting 3.48

Box 3.7 Double counting 3.56

Box 3.8 Methanol process descriptions 3.58

Box 3.9 Ethylene process description 3.59

Box 3.10 Ethylene dichloride and vinyl chloride monomer process descriptions 3.59

Box 3.11 Ethylene oxide process description 3.60

Box 3.12 Acrylonitrile process description 3.61

Box 3.13 Carbon black production process descriptions 3.62

Box 3.14 Plant measurement frequency 3.100

3 CHEMICAL INDUSTRY EMISSIONS 3.1 INTRODUCTION

The following Sections 3.2 through 3.10 give guidance for estimating greenhouse gas emissions that result from the production of various inorganic and organic chemicals for which experience by a number of countries has confirmed significant contributions to global or individual national greenhouse gas emission levels.

• Section 3.2 covers emissions from ammonia production;

• Section 3.3 covers emissions from nitric acid production;

• Section 3.4 covers emissions from adipic acid production;

• Section 3.5 covers emissions from the production of caprolactam, glyoxal, and glyoxylic acid;

• Section 3.6 covers emissions from the production of carbide;

• Section 3.7 deals with emissions from the production of titanium dioxide;

• Section 3.8 deals with emissions from the production of soda ash;

• Section 3.9 covers emissions from key processes in the petrochemical and carbon black production, i.e., methanol, ethylene and propylene, ethylene dichloride, ethylene oxide, acrylonitrile, and carbon black;

• Section 3.10 deals with emissions from fluorochemical production i.e., HFC-23 from the production of HCFC-22 and fugitive and by-product emissions from the production of other fluorinated compounds including hydrofluorocarbons (HFCs), sulphur hexafluoride (SF6) and uranium hexafluoride (UF6).

Care should be exercised to avoid double counting of carbon dioxide (CO2) emissions in both this chapter and in Volume 2 on Energy Sector, or, in omitting CO2 emissions since CO2 emissions resulting from carbon's role as process reactant and as a heat source to drive the chemical reactions involved in the chemical processes can be closely related. Should CO2 capture technology be installed at a chemical plant, the CO2 captured should be deducted in a higher tier emissions calculation. Respective guidance on the capture and subsequent destruction or use of HFC-23 or other fluorochemicals is given in section 3.10. Any methodology taking into account CO2 capture should consider that CO2 emissions captured in the process may be both combustion and process-related. In cases where combustion and process emissions are to be reported separately, e.g., in the petrochemical industry, inventory compilers should ensure that the same quantities of CO2 are not double counted. In these cases the total amount of CO2 captured should preferably be reported in the corresponding energy combustion and IPPU categories in proportion to the amounts of CO2 generated in these source categories. The default assumption is that there is no CO2 capture and storage (CCS) taking place. For additional information on CO2 capture and storage refer to Volume 3, Section 1.2.2 and for more details to Volume 2, Section 2.3.4.

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