本文關(guān)鍵詞：吸附法深度脫除液化石油氣中硫化物的研究　出處：《華東理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 液化石油氣 活性白土 Al-MCM-41 吸附脫硫

【摘要】：本文研究了混捏法和等體積浸漬法制備改性吸附劑,采用固定床動態(tài)吸附的方式考察吸附劑脫除LPG中硫化物的性能,并使用XRD、BET、TG-DSC、Raman、Py-IR、SEM、TEM、FTIR等技術(shù)對吸附劑進行表征及吸附脫硫機理研究。研究表明,混捏法制備的含銅化合物改性活性白土吸附劑有良好的脫硫效果,同時發(fā)現(xiàn)含銅化合物中的陰離子對脫硫過程無影響,起決定作用的是銅離子,并通過XRD分析可知,當(dāng)銅在吸附劑上以Cu2(OH)3N03的形式存在時,脫硫效果要好于銅以CuO的形式存在。當(dāng)銅負載量為15 wt%,焙燒溫度為150℃時,吸附劑脫硫性能達到最佳。通過Py-IR分析可知,銅改性活性白土吸附劑可以提高吸附劑的L酸量,有利于對硫化物的吸附;利用Raman分析可知,銅改性活性白土吸附劑是通過絡(luò)合S-M的方式脫除硫化物,且Cu(I)比Cu(II)與硫化物之間有更多的結(jié)合位點,其脫硫效果明顯好于后者。等體積浸漬法制備雜多酸改性A1-MCM-41吸附劑脫硫效果較未改性吸附劑有明顯的提高,且磷鎢酸的效果好于磷鉬酸。當(dāng)雜多酸的負載量為25wt%,焙燒溫度為550℃時吸附劑脫硫性能最佳。通過Py-IR分析可知,負載雜多酸可以提高吸附劑的酸量,促進吸附劑對硫化物的吸附。同時發(fā)現(xiàn),雜多酸改性A1-MCM-41吸附劑有著優(yōu)良的再生性能,最好的再生條件為:空氣氣氛中再生溫度為550℃,時間為5h。
[Abstract]:In this paper, the modified adsorbents were prepared by kneading method and iso-volume impregnation method. The performance of adsorbent in removing sulfides from LPG was investigated by means of dynamic adsorption in fixed bed, and XRD-BET was used. The adsorbents were characterized and desulfurized by TG-DSC-Raman-Py-IRTM-SEMM-TME-FTIR. The results show that the adsorbents can be adsorbed and the desulfurization mechanism of the adsorbents is also studied. The modified activated clay adsorbent prepared by kneading method has a good desulfurization effect. At the same time, it is found that the anions in the copper-containing compounds have no effect on the desulphurization process, and copper ions play a decisive role in the desulfurization process. The results of XRD analysis showed that the desulfurization effect of copper was better than that of copper in the form of CuO when copper was adsorbed on the adsorbent in the form of Cu2(OH)3N03. When the amount of copper loaded on the adsorbent was 15 wt%, the desulfurization effect was better than that of copper in the form of CuO. When the calcination temperature is 150 鈩，

本文編號：1397639