本文關(guān)鍵詞： Ti-HMS 合成 金屬改性 表征 氧化脫硫　出處：《高�；瘜W(xué)工程學(xué)報(bào)》2017年01期 　論文類型：期刊論文

【摘要】：通過(guò)超聲浸漬的方式對(duì)原位合成的Ti-HMS分子篩進(jìn)行負(fù)載金屬改性,制備Fe/Ti-HMS、Cu/Ti-HMS和Zn/Ti-HMS催化劑,并采用XRD、SEM、TEM、FTIR、BET等手段對(duì)催化劑的結(jié)構(gòu)和形貌進(jìn)行表征,以模型油中噻吩的氧化脫除為探針?lè)磻?yīng)對(duì)各催化劑的催化氧化脫硫性能進(jìn)行研究,并考察了反應(yīng)時(shí)間、n(H_2O_2)/n(S)、Zn/Ti-HMS催化劑用量和反應(yīng)溫度對(duì)脫硫率的影響。實(shí)驗(yàn)結(jié)果表明,原位合成的Ti-HMS分子篩具有典型的介孔孔道結(jié)構(gòu),金屬組分以氧化物的形式分散在分子篩的表面,金屬組分的存在可以有效地提高催化劑的催化活性,負(fù)載金屬組分的催化劑催化活性由大到小依次為Zn/Ti-HMSCu/Ti-HMSFe/Ti-HMS。在反應(yīng)溫度為70℃、n(H_2O_2)/n(S)=6、Zn/Ti-HMS催化劑用量0.2 g×(10 m L)~(-1)、反應(yīng)時(shí)間60 min時(shí),噻吩的脫除率達(dá)到94.03%。催化劑再生后催化氧化脫硫性能有所下降,表面金屬活性組分的消耗和分子篩部分孔道被堵塞是導(dǎo)致催化劑催化活性下降的原因。
[Abstract]:Fe / Ti-HMS-Cup-Ti-HMS and Zn/Ti-HMS catalysts were prepared by metal modification of in-situ synthesized Ti-HMS molecular sieve by ultrasonic impregnation. The structure and morphology of the catalyst were characterized by means of XRDX SEM Tem Tem FTIR BET and so on. The catalytic oxidation desulfurization performance of each catalyst was studied with the oxidation removal of thiophene from the model oil as a probe reaction. The reaction time was investigated. The effect of the amount of Zn/Ti-HMS catalyst and reaction temperature on the desulphurization rate. The experimental results show that the in-situ synthesis of Ti-HMS molecular sieve has a typical mesoporous structure. The metal component is dispersed on the surface of molecular sieve in the form of oxide. The presence of metal component can effectively improve the catalytic activity of the catalyst. The catalytic activity of the supported metal component is Zn / Ti-HMSCU / Ti-HMSFe / Ti-HMSs from large to small, and the reaction temperature is 70 鈩，

本文編號(hào)：1482487