本文選題：NO + 鈷配合物��； 參考：《江南大學(xué)》2015年碩士論文

【摘要】：隨著國民經(jīng)濟(jì)的快速發(fā)展,能源消耗帶來氮氧化物的排放量急劇上升。目前我國在氮氧化物的控制上主要利用低氮燃燒技術(shù)、選擇性催化還原(SCR)、選擇性非催化還原(SNCR)技術(shù),取得了一定的效果,但是仍存在一些問題。金屬配合物絡(luò)合吸收法因其溫和的反應(yīng)條件和高效的脫氮效率引起了大家的關(guān)注。本文以半胱氨酸合鈷(II)、蛋氨酸合鈷(II)和巰基丙酸合鈷(II)為吸收液,分別考察了三種吸收液在簡易吸收裝置中去除NO的能力。半胱氨酸合鈷(II)處理NO的最優(yōu)條件:吸收液濃度0.03 mol/L,摩爾配比1:3,溫度30 oC,p H值為9,NO進(jìn)氣濃度759 mg/m3,NO去除率可達(dá)87%;蛋氨酸合鈷(II)處理NO的最優(yōu)條件:吸收液濃度0.05 mol/L,摩爾配比1:2,溫度30 oC,p H值為8,NO進(jìn)氣濃度759 mg/m3,NO去除率可達(dá)80%;巰基丙酸合鈷(II)處理NO的最優(yōu)條件:吸收液濃度0.02 mol/L,摩爾配比1:4,吸收液30 oC,p H值為9,NO進(jìn)氣濃度759 mg/m3,NO去除率可達(dá)88%。在上述最優(yōu)吸收條件下,半胱氨酸合鈷(II)、蛋氨酸合鈷(II)和巰基丙酸合鈷(II)處理NO的絡(luò)合容量分別為0.83 mmol/L、0.73 mmol/L和0.90 mmol/L。采用中空纖維膜接觸器,以巰基丙酸合鈷(II)為吸收液處理NO。最佳工藝參數(shù)為:Co2+和巰基丙酸摩爾配比為1:4,NO氣體流速0.027 m/s,濃度612.47 mg/m3,吸收液p H值為9,濃度0.02 mol/L,流量2.97×10-6 m3/s,溫度50 oC,NO去除率達(dá)到99.16%,總傳質(zhì)系數(shù)為2.24×10-5 m/s。以蛋氨酸合鈷(II)為吸收液處理NO。最佳工藝參數(shù)為:Co2+和蛋氨酸摩爾配比為1:2,NO氣體流速0.027 m/s,濃度612.47 mg/m3,吸收液p H值為8,濃度0.05 mol/L,流量4.28×10-6 m3/s,溫度50 oC。NO去除率可達(dá)98.85%,總傳質(zhì)系數(shù)為2.23×10-5 m/s。分別在上述最佳條件下,初步探究了鈷配合物吸收液處理NO的反應(yīng)機(jī)理。采用Na2SO3、L-抗壞血酸、活性炭還原再生鈷配合物吸收液,其能力依次為:活性炭L-抗壞血酸Na2SO3。增加活性炭比表面積、用量、反應(yīng)溫度、攪拌速度和減小p H均能增強(qiáng)粉狀活性炭對鈷配合物再生的效率。巰基丙酸合鈷(II)的最佳再生條件為:粉狀活性炭使用量6 g/L,反應(yīng)溫度80 oC,p H值為3,攪拌速度200 r/min,再生率為94.35%。蛋氨酸合鈷(II)的最佳再生條件為:粉狀活性炭使用量8 g/L,反應(yīng)溫度80 oC,p H值為3,攪拌速度300 r/min,再生率為91.11%。
[Abstract]:With the rapid development of the national economy, energy consumption brings a sharp increase in nitrogen oxide emissions. At present, the technology of low nitrogen combustion, selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) are mainly used in the control of nitrogen oxides in China, but there are still some problems. Complex absorption of metal complexes has attracted much attention due to its mild reaction conditions and high denitrification efficiency. In this paper, the ability of removing no from three kinds of absorbents in a simple absorption device was investigated by using cysteine Cobalt (II), methionine Cobalt (II) and Mercaptopropionate Cobalt (II) as absorbents. The optimum conditions for no treatment were as follows: the concentration of absorbent solution was 0.03 mol / L, the molar ratio was 1: 3, and the temperature was 30 oC ~ (-1). The removal rate of no could reach 87g 路m ~ (3) N ~ (2). The optimum conditions for no treatment were as follows: the concentration of absorbent was 0.05 mol / L, the concentration of no was 0.05 mol 路L ~ (-1), and the removal rate of no could be up to 87g / m ~ (3). Molar ratio of 1: 2, temperature of 30oC ~ (-1) H = 8 渭 m ~ (-1) no intake concentration 759 mg / m ~ (3) no removal rate can reach 80. The optimum conditions for no treatment by thioglycolylic acid and Cobalt II) are as follows: absorbent concentration 0.02 mol / L, molar ratio 1: 4, absorbent 30 oCpH = 759 mg / m ~ (3) no removal rate. Under the above optimum absorption conditions, the complexation capacities of no treated with cysteine Cobalt II, methionine Cobalt II) and Mercaptopropionate Cobalt II) were 0.83 mmol / L 0.73 mmol / L and 0.90 mmol / L, respectively. The hollow fiber membrane contactor was used to treat no with cobalt thiolpropionate II as absorbent. The optimum technological parameters are as follows: molar ratio of 1: CO2 and mercaptopropionic acid is 1: 4no gas flow rate 0.027 m / s, concentration 612.47 mg / m 3, pH value of absorbent solution 9, concentration 0.02 mol / L, flow rate 2.97 脳 10 -6 m3 / s, removal rate of no at 50oC ~ (2) N = 99.16 and total mass transfer coefficient 2.24 脳 10 ~ (-5) Ms / s. No was treated with methionine Cobalt II as absorbent. The optimum technological parameters are as follows: the molar ratio of 1: CO2 and methionine is 1: 2no gas flow rate 0.027 m / s, the concentration is 612.47 mg / m 3, the pH value of the absorbent solution is 8, the concentration is 0.05 mol / L, the flow rate is 4.28 脳 10 -6 m3 / s, the temperature is 50 oC.NO removal rate can reach 98.85 batches, the total mass transfer coefficient is 2.23 脳 10 ~ (-5) m / s. Under the above optimum conditions, the reaction mechanism of no treatment with cobalt complex absorbent solution was preliminarily investigated. Na2SO3 L- ascorbic acid and activated carbon were used to reduce and regenerate cobalt complex absorbents. The order of their ability was as follows: activated carbon L- ascorbic acid Na _ 2SO _ 3. Increasing the specific surface area, amount of activated carbon, reaction temperature, stirring speed and reducing pH can enhance the regeneration efficiency of cobalt complex. The optimum regeneration conditions were as follows: dosage of powdered activated carbon was 6 g / L, reaction temperature was 80 鈩，

本文編號：2012543