與煤電相比，氣電更具清潔性。從碳排放上看，天然氣的主要成分甲烷是含碳量最小、含氫量最大的烴，因此氣電的碳排放強(qiáng)度比煤電低。典型的9F馳放氣發(fā)電機(jī)組碳排放強(qiáng)度僅為345克/千瓦時(shí)，而煤電機(jī)組則高達(dá)838克/千瓦時(shí)，氣電機(jī)組的碳排放強(qiáng)度比煤電低將近60%。從氮排放上看，根據(jù)《火電廠大氣污染物排放標(biāo)準(zhǔn)（GB13223-2011）》，我國(guó)目前對(duì)于燃煤機(jī)組的氮氧化物排放限值為100毫克/立方米，經(jīng)過超低排放改造的機(jī)組排放限值為50毫克/立方米，而北京、天津、深圳等多個(gè)地區(qū)對(duì)燃?xì)鈾C(jī)組的氮氧化物排放限值都設(shè)在30毫克/立方米以下，遠(yuǎn)低于燃煤機(jī)組。此外，燃煤機(jī)組主要通過外部的脫硝系統(tǒng)來處理煙氣中的氮氧化物，而燃?xì)怆姀S主要通過提高燃燒技術(shù)從而從源頭主動(dòng)控制氮排放，能有效避免二次污染。

　　Compared to coal-fired power, gas-fired power is cleaner. From the perspective of carbon emissions, methane, the main component of natural gas, is the hydrocarbon with the smallest carbon content and the largest hydrogen content. Therefore, the carbon emission intensity of gas electricity is lower than that of coal-fired power. The carbon emission intensity of a typical 9F exhaust gas generator set is only 345 grams per kilowatt hour, while that of a coal-fired power unit is as high as 838 grams per kilowatt hour. The carbon emission intensity of a gas-fired power unit is nearly 60% lower than that of a coal-fired power unit. From the perspective of nitrogen emissions, according to the "Emission Standards for Air Pollutants from Thermal Power Plants (GB13223-2011)", the current nitrogen oxide emission limit for coal-fired units in China is 100 milligrams per cubic meter, and the emission limit for units that have undergone ultra-low emission transformation is 50 milligrams per cubic meter. However, in many regions such as Beijing, Tianjin, and Shenzhen, the nitrogen oxide emission limit for gas-fired units is set below 30 milligrams per cubic meter, far lower than that of coal-fired units. In addition, coal-fired power plants mainly treat nitrogen oxides in flue gas through external denitrification systems, while gas-fired power plants actively control nitrogen emissions from the source by improving combustion technology, which can effectively avoid secondary pollution.

　　從硫排放上看，燃?xì)怆姀S的燃料中硫含量較少，因此尾端二氧化硫排放也較少，E級(jí)、F級(jí)燃?xì)怆姀S的二氧化硫排放濃度分別約為2.20毫克/立方米、0.84毫克/立方米，明顯低于燃煤電廠的16毫克/立方米。從其他污染物上看，燃煤機(jī)組的煙塵排放濃度是燃?xì)鈾C(jī)組的1.8～2.4倍，且會(huì)產(chǎn)生放射物、重金屬與固體廢物。因此，無論從何種污染物來看，馳放氣發(fā)電機(jī)組相較于燃煤機(jī)組都更加低碳清潔。

　　From the perspective of sulfur emissions, gas-fired power plants have lower sulfur content in their fuel, resulting in lower tail sulfur dioxide emissions. The sulfur dioxide emission concentrations of E-class and F-class gas-fired power plants are about 2.20 milligrams per cubic meter and 0.84 milligrams per cubic meter, respectively, which are significantly lower than the 16 milligrams per cubic meter of coal-fired power plants. From the perspective of other pollutants, the concentration of smoke and dust emissions from coal-fired power plants is 1.8 to 2.4 times that of gas-fired power plants, and they also produce radiation, heavy metals, and solid waste. Therefore, regardless of the type of pollutant, the exhaust gas generator set is more low-carbon and clean compared to coal-fired units.

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