本文選題：溶膠凝膠法　切入點(diǎn)：Mo-Ni復(fù)合氧化物　出處：《石油煉制與化工》2016年05期 　論文類型：期刊論文

【摘要】：采用溶膠-凝膠法制備了體相型Mo-Ni復(fù)合氧化物加氫脫硫催化劑,并對其進(jìn)行XRD,BET,NH_3-TPD等表征,以二苯并噻吩質(zhì)量分?jǐn)?shù)2%的正辛烷溶液為原料,在連續(xù)固定床反應(yīng)裝置上對催化劑的加氫脫硫性能進(jìn)行評(píng)價(jià),考察催化劑焙燒溫度、溶膠凝膠過程中溶液pH以及淀粉的加入量等對催化劑性質(zhì)和性能的影響。結(jié)果表明:在500℃以上高溫焙燒后的氧化態(tài)催化劑中主要存在α-NiMoO_4和β-NiMoO_4晶相,硫化態(tài)催化劑中則存在MoS_2和Ni_2S_3晶相;焙燒溫度的升高有利于氧化態(tài)催化劑形成α-NiMoO_4晶相,溶液堿性的增加則有利于形成β-NiMoO_4晶相,二者均導(dǎo)致催化劑的總酸量顯著降低;淀粉的加入對氧化態(tài)催化劑的晶相影響很小,但有利于提高活性組分的分散性,適量淀粉的加入可提高催化劑的比表面積和孔體積;在焙燒溫度為600℃、溶液pH為2和淀粉加入量為15g/mol的條件下所制備的催化劑具有較高的加氫脫硫活性,在反應(yīng)溫度為260℃、反應(yīng)壓力為2.5MPa、體積空速為2h-1和氫油體積比為300的條件下,對于硫質(zhì)量分?jǐn)?shù)為3480μg/g的原料,加氫脫硫率高達(dá)98.3%,二苯并噻吩的反應(yīng)以加氫脫硫路徑占優(yōu)勢,加氫脫硫路徑與氫解脫硫路徑反應(yīng)的比值約為1.23。
[Abstract]:Bulk Mo-Ni complex oxide hydrodesulfurization catalyst was prepared by sol-gel method. The catalyst was characterized by XRD-BET-NH3-TPD. The catalyst was prepared from n-octane solution with dibenzothiophene content of 2%. The hydrodesulfurization performance of the catalyst was evaluated in a continuous fixed-bed reactor, and the calcination temperature of the catalyst was investigated. The effects of solution pH and starch addition on the properties and properties of the catalysts were investigated. The results showed that 偽 -NiMoO4 and 尾 -NiMoOS-4 crystal phases were mainly present in the oxidized catalysts calcined above 500 鈩，

本文編號(hào)：1568295