【摘要】：隨著工業(yè)化快速的發(fā)展,能源消耗的持續(xù)增長(zhǎng),以煤和石油為主的能源在燃燒過(guò)程中排放出大量的二氧化碳、二氧化硫、氮氧化物等造成了環(huán)境污染。對(duì)污染性氣體進(jìn)行分離與純化是治理氣體污染的重要途徑。膜分離具有高效、節(jié)能、環(huán)保的優(yōu)點(diǎn),它基于膜材料的選擇性來(lái)實(shí)現(xiàn)對(duì)不同組分的分離、提純,已被廣泛應(yīng)用于化工、冶金、能源等領(lǐng)域。近年來(lái),特別是隨著氣體分離膜、滲透氣化膜的相繼出現(xiàn),為氣體分離工藝開(kāi)辟了新的途徑。本文研究了離子液體支撐液膜分離混合氣體。分別以PVDF和PSF為基膜,用非溶劑致相分離法制備聚合物微孔膜。利用分子模擬計(jì)算[BMIM][CH3CH2COO]、[BMIM][CH3COO]、[BMIM][SCN]、[BMIM][CF3CO O]、[BMIM][CH3C6H4SO3]等離子液體與氣體分子形成配位化合物的最優(yōu)構(gòu)型和配位化合物的最低配位能,來(lái)預(yù)測(cè)離子液體的氣體選擇性。合成上述的離子液體,并制備出離子液體支撐液膜,測(cè)定在一定的進(jìn)氣壓力下不同溫度時(shí)支撐液膜對(duì)N2、H2、CO2等氣體的滲透速率及支撐液膜對(duì)CO2/N2、CO2/H2、N2/H2的分離效率。實(shí)驗(yàn)結(jié)果表明:PVDF型離子液體支撐液膜對(duì)氣體的滲透系數(shù)P維持在10-10[m3(STP)·m/m2·s·atm]數(shù)量級(jí),PVDF-[BMIM][CH3C6H4SO3]支撐液膜對(duì)CO2/N2分離因子在30℃達(dá)到最高為10.86,對(duì)CO2/H2分離因子30℃達(dá)到最高為7.12,低溫環(huán)境有利于PVDF型離子液體支撐液膜的氣體分離;而PSF離子液體支撐液膜的氣體滲透系數(shù)維持在10-9[m3(STP)·m/m2·s·atm]數(shù)量級(jí),PSF-[BMIM][C3H8O2]支撐液膜對(duì)N2/CO2分離因子在50℃時(shí)達(dá)到最大值為4.17。
[Abstract]:With the rapid development of industrialization and the continuous increase of energy consumption, coal and petroleum energy sources emit a lot of carbon dioxide, sulfur dioxide and nitrogen oxides in the process of combustion, resulting in environmental pollution. The separation and purification of polluting gases is an important way to control gas pollution. Membrane separation has the advantages of high efficiency, energy saving and environmental protection. It is based on the selectivity of membrane materials to achieve the separation and purification of different components. It has been widely used in chemical, metallurgical, energy and other fields. In recent years, especially with the gas separation membrane, permeable gasification membrane appeared one after another, which opened up a new way for gas separation process. The separation of mixed gases by ionic liquid supported liquid membrane has been studied in this paper. Polymer microporous membranes were prepared by non-solvent phase separation using PVDF and PSF as base membranes respectively. The optimum configuration of [BMIM] [CH3CH2COO], [BMIM] [CH3COO], [BMIM] [SCN], [BMIM] [CF3CO O], [BMIM] [CH3C6H4SO3] plasma liquids to form coordination compounds with gas molecules were calculated by molecular simulation to predict the gas selectivity of ionic liquids. The above ionic liquids were synthesized and the ionic liquid supported liquid membranes were prepared. The permeation rate of the supported liquid membranes to the gases such as N _ 2H _ 2O _ 2 and the separation efficiency of the supported liquid membranes for CO2/N2,CO2/H2,N2/H2 were measured at different temperatures under a certain inlet pressure. The experimental results show that the permeation coefficient of the support liquid membrane P to the gas is 10-10 [m3 (STP) m/m2 s atm] order of magnitude. The maximum separation factor for CO2/N2 is 10.86 at 30 鈩，

本文編號(hào)：2207628