LCI Study of SCR DeNOx Technology for Cement Industry

Abstract

LCI study is short for life cycle inventory study. In the situation of more strict regulation limit of 500 mg NOx /m3 a demonstration project to reduce NOx emissions with clinker production capacity of 2000 t/d in Beijing is supported by the 'Five-twelfth' National Science and Technology Support Program of China Science and Technology Department. A selective catalytic reduction denitration (SCR DeNOx) technology is expected to be applied in this project. LCA models the life cycle of cement manufacturing with SCR DeNOx technology applied as its SCR system. The life cycle is from the coal and raw materials transportation, through the coal and raw meal grinding, to the clinker incineration, and finally the flue gas including NOx to the SCR reactor. The functional unit is 1 ton clinker. Data for cement produced in LNB technology as bench mark is analyzed and the SCR scenarios are to show that the SCR reactor can be established because the additional environmental impact is small due to small consumptions of reducing agent and electricity. SCR technology enable the deNOx efficiency much higher with small environmental impact.

Scenario Analysis of Denitration for Chinese Coal-Fired Power Generation

“…Nowadays the power plant produces about 1000 MWof electricity or more.Moreover, the NOx emissions are not the significance in these literatures. However, in China the NOx emissions make catastrophic environmental impacts [13][14].There is a lack of evaluation on NOx mitigation strategies for Chinese coal-fired power generation.…”

Potentials for Denox in Chinese Cement Industry with the Life Cycle Assessment Method

“…According to the surveys of Ministry of Environmental Protection in China the Chinese cement industry emitted1.8 Mt of NOx emissions in 2008. Li et al [1][2][3] calculated the NOx emissions of Chinese cement industry to be 2.8 Mt in 2013, which increased more than 50% in five years. The Chinese central government forced industries to reduce NOx emissions by 12% from 2011 to 2015 and strict limit of NOx emissions was set.…”