有机-无机柱撑蒙脱石的制备与脱硫性能

PREPARATION OF ORGANIC-INORGANIC PILLARED MONTMORILLONITE AND ITS DESULFURIZATION

用钠化改性的蒙脱石为基质,采用超声波法合成了具有一定比表面积的十六烷基三甲基氯化铵(HDTMA-Cl)-锌铝柱撑蒙脱石。以有机-无机复合柱撑蒙脱石为负载基质,制备以锌、铜、锰复合氧化物为活性组分的脱硫剂,采用X射线粉末衍射(XRD)和比表面积测定(BET)对其进行表征。以天然气中的硫化物(H2S、CS2、COS等)为脱除对象,对制备的脱硫剂进行脱硫实验,根据出口硫化物质量含量探讨了在不同的复合柱撑蒙脱石负载基质用量、温度、压强及空气流速条件下,使用所制备脱硫剂对脱硫实验效果的影响。对脱硫效果进行对比,认为复合柱撑蒙脱石负载基质的用量占脱硫剂的30%时脱硫效果好。脱硫最佳工艺条件为:脱硫温度为250℃,压强为1.0 MPa,空速为1000 h-1。

Inorganic-organic pillared montmorillonite intercalated by alunainium-zinc and alkyl ammonium chloride （HDTMA-Cl） was successfully prepared by ultrasonic technique. We prefabricated the desulfurizer taking inorganic-organic pillared montmorillonite as the loading fundns and zinc, copper and manganese oxide compounds oxide as active components. The desulfurizer was characterized by X-ray diffraction （XRD） and BET. We did the desulfuration experiment with natural gas, estimated and discussed the influence of desulfurization precision with different dosages of loading fundns, temperature, intensity of pressure and velocity of air. According to the results of measurement, the optimal conditions are presented as follows： the dosage of loading fimdns accounts for 30% of desulfurizer, desulfurization temperature is 250℃, the intensity of pressure is 1.0 MPa, and the velocity of air is 1000 h^-1.