Xây dựng dữ liệu bộ hệ số phát thải các chất ô nhiễm không khí trong quá trình cán thép

Thuy Thi Thu Nguyen Journal of SCIENCE and TECHNOLOGY 127(13): 51 - 56

51

ESTABLISHMENT OF A DATABASE OF EMISSION FACTORS FOR

ATMOSPHERIC POLLUTANTS FROM STEEL ROLLING PROCESS

Thuy Thi Thu Nguyen*

University of Technology – TNU

ABSTRACT

Emission factors have long been used as a cost-effective means to develop area-wide emission

inventories. However, data on emission factors for industries are still scarce in developing

countries including Vietnam. This paper presents results on emission factors of selected air

pollutants being CO, CO2, SO2 and NO for steel rolling process in iron and steel industry.

Concentrations of these pollutants were measured by a combustion gas analyzer, Quintox KM -

9106 at Thai Nguyen Iron and Steel Joint Stock Company. Based on data monitored and the

information of process, total emissions and emission factors of these pollutants for this process

were determined. Computation basing on burning fuel, the emission factors of CO, CO2, SO2 and

NO in the experiment were 0.13 g/kg; 2990 g/kg; 29.36 g/kg and 16.67 g/kg, respectively.

Alternately, base on steel product, the emission factors of CO, CO2, SO2 and NO in the experiment

were 1.89 kg/ton; 42.35 kg/ton; 0.42 kg/ton and 0.24 kg/ton, correspondingly. The results obtained

from the research can be used for industrial emission inventories and air quality management in

Viet Nam.

Keywords: Emission factor, steel rolling, iron and steel, industry, emission inventory.

INTRODUCTION*

An emission factor is a tool that is used to

estimate air pollutant emissions to the

atmosphere. It relates the quantity of

pollutants released from a source to some

activity associated with those emissions.

Emission factors are usually expressed as the

weight of pollutant emitted divided by a unit

weight, volume, distance, or duration of the

activity emitting the pollutant (e.g., pounds of

particulate matter emitted per ton of coal

burned). Emission factors have long been

used as a cost-effective means to develop

area-wide emission inventories. This is a

simple method to estimate pollutant emission

to the atmosphere when the available data are

insufficient [1]. Therefore, establishing of a

database of emission factors for atmospheric

pollutants makes an important contribution to

air quality management in Viet Nam.

Until now, determination of emission factors

in developed countries and international

* Tel: 0979958785; Email: [email protected]

organizations has significantly developed

(such as AP-42 document of United State, the

database of World Health Organization -

WHO, the document of United Nations

Environment Program – UNEP, the database

of Intergovernmental Panel on Climate

Change - IPCC). Most emission factors of

industries have been applied in these

documents [1,2,21,22]. In Asian countries, the

establishment of emission factors has been

implemented for recent years. However,

determining emission factors in industries has

not yet completed. Most studies on emission

factors focus on coal-fired power industry

[3,4,5]. Generally, the data on emission

factors for iron and steel industry in Asian

countries, including Viet Nam, is scarce and

cannot meet the requirements to control air

pollution which are becoming a necessity for

the countries in the region. The first studies

on emission factors of pollutants in Viet Nam

have been initiated for recent years [6-18].

However, a database of emission factors for

industry in Vietnam is still scarce especially

in iron and steel industry.