Analysis of Reduction Potential of Primary Air Pollutant Emissions from Coking Industry in China

Abstract

Air pollutant emissions from the coking industry in China, the world's largest coke producer, are a major societal concern. This study employed a bottom-up emission-factor methodology to estimate the country's coking-industry airpollutant emissions. Total suspended particulate matter (TSP), particulate matter with an aerodynamic diameter less than or equal to 2.5 µm (PM 2.5 ), sulfur dioxide (SO 2 ), nitrogen oxides (NO x ), volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), carbon monoxide (CO), and methane (CH 4 ) were considered. The emissions in 2015 were estimated to be 368. 36, 23.28, 402.54, 174.43, 1325.42, 28.24, 2036.43, and 71.68 kt for TSP, PM 2.5 , SO 2 , NO x , VOCs, PAHs, CO, and CH 4 , respectively, with an annual average growth rate of 1.1% during the 12th five-year-plan (2011)(2012)(2013)(2014)(2015). A comparative analysis was performed on emission contributions from air pollutants produced by various types of coke ovens and using various coking procedures. The objectives of the 13th five-year-plan (2016-2020) were used to predict China's production of coke and methods of control in 2020 and to analyze the potential reduction in typical air pollutants. The results show that emissions of TSP, SO 2 , and NO x will be reduced by 82.9%, 94.4%, and 6.9%, respectively. Moreover, this study proposes a series of feasible control measures for air-pollutant emissions from the coking industry in China.

Role of export industries on ozone pollution and its precursors in China

“…j Local factor unavailable. Factor from US EPA (2008) 55 was adopted 50 , 56 , 57 , which was based on the higher bound of emission level in an earlier study by Economic Commission for Europe (ECE) 58 . k Based on the lower bound of emission level by ECE 58 .…”

Spatial-Temporal Distribution and Variation of NO2 and Its Sources and Chemical Sinks in Shanxi Province, China

“…The detailed measures targeting SO 2 abatement included enforcing desulfurization in coal-fired power plants, restricting emission standards, improving fuel equipment, adjusting the energy consumption structure, reforming urban villages, switching from residential coal to cleaner fuels, promoting centralized heating system, removing small boilers, and eliminating small coking industries or reconstructing to large mechanized coke plants etc. [48][49][50][51].As a result, the concentration of SO 2 in the atmosphere was decreasing prominently nationwide. However, NO 2 pollution become increasingly prominent due to the lack of effective control policy and technology, as well as the drastic expansion of the public transportation system and vehicle numbers.…”

Research on degradation mechanism of trichlorobenzene and Hg0 by nonthermal plasma catalysis

“…Relevant data show that the input of mercury in coking coal accounts for 35%-46% of the national total. At the same time, some polychlorodibenzo-p-dioxins (PCDDs) are synthesized by chlorine and benzene series in the boiler and are emitted with the flue gas [3]. Current technologies such as carbon-based material adsorption technology, thermal catalytic oxidation technology, photocatalytic oxidation, wet scrubbing and nonthermal plasma (NTP) enable the effective removal of multiple pollutants [4][5][6][7].…”