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瑞典研究人員利用沸石使石腦油直接變?yōu)椴裼? 已有15人參與
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瑞典研究人員利用沸石使石腦油直接變?yōu)椴裼?br />
-------------------------------------------------------------------------------- 作者:黃堃 發(fā)表時間:2012-02-08 摘自:新華網(wǎng) 瑞典斯德哥爾摩大學等機構(gòu)研究人員最新在英國《自然·化學》雜志上刊文稱,經(jīng)一種特殊結(jié)構(gòu)的沸石材料催化,工業(yè)原料石腦油可以直接變?yōu)椴裼,補充現(xiàn)有的能源供給。 石腦油是一部分石油輕餾分的泛稱,可分離出汽油、煤油、苯等多種有機原料,常用作工業(yè)原料。沸石是可以在分子水平上篩分物質(zhì)的多孔礦物材料,被廣泛用作吸附劑、離子交換劑和催化劑等。斯德哥爾摩大學研究人員發(fā)現(xiàn)一種代號為ITQ-39的沸石是迄今已知內(nèi)部結(jié)構(gòu)最復雜的沸石,它的內(nèi)部孔狀結(jié)構(gòu)正好可以用來催化處理石腦油,經(jīng)過這種沸石的催化作用后,石腦油可以直接變?yōu)椴裼汀?br /> 據(jù)介紹,現(xiàn)在石腦油的供應比較充足,而對柴油的需求又較高,此前還沒有發(fā)現(xiàn)能夠商業(yè)化應用、把石腦油變?yōu)椴裼偷母咝Т呋瘎,因此這一發(fā)現(xiàn)在幫助解決當前的能源問題上非常有意義。 Nature Chemistry | Article Structure and catalytic properties of the most complex intergrown zeolite ITQ-39 determined by electron crystallography Tom Willhammar,1 Junliang Sun,1 Wei Wan,1 Peter Oleynikov,1 Daliang Zhang,1, 4 Xiaodong Zou,1 Manuel Moliner,2 Jorge Gonzalez,2, 3 Cristina Martínez,2 Fernando Rey2 & Avelino Corma2 Affiliations Contributions Corresponding authors Journal name: Nature Chemistry Year published: (2012) DOI: doi:10.1038/nchem.1253 Received 10 October 2011 Accepted 15 December 2011 Published online 29 January 2012 Highlighting tool CompoundsUpdate Highlighting Abstract Abstract Author information Supplementary information Article toolsPrint Download citation Order reprints Rights and permissions Share/bookmark Connotea Cite U Like Delicious Digg Porous materials such as zeolites contain well-defined pores in molecular dimensions and have important industrial applications in catalysis, sorption and separation. Aluminosilicates with intersecting 10- and 12-ring channels are particularly interesting as selective catalysts. Many porous materials, especially zeolites, form only nanosized powders and some are intergrowths of different structures, making structure determination very challenging. Here, we report the atomic structures of an aluminosilicate zeolite family, ITQ-39, solved from nanocrystals only a few unit cells in size by electron crystallography. ITQ-39 is an intergrowth of three different polymorphs, built from the same layer but with different stacking sequences. ITQ-39 contains stacking faults and twinning with nano-sized domains, being the most complex zeolite ever solved. The unique structure of ITQ-39, with a three-dimensional intersecting pairwise 12-ring and 10-ring pore system, makes it a promising catalyst for converting naphtha into diesel fuel, a process of emerging interest for the petrochemical industry. Figures at a glance [ Last edited by yexuqing on 2012-2-9 at 08:25 ] |
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捐助貴賓 (著名寫手)
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全文鏈接:http://www.nature.com/nchem/jour ... ull/nchem.1253.html 看催化結(jié)果感覺沒有原來石油大學做的微孔介孔符合分子篩的轉(zhuǎn)化率高,但這個選擇性要高不少。 |

金蟲 (著名寫手)

金蟲 (小有名氣)
金蟲 (著名寫手)

鐵桿木蟲 (正式寫手)
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木蟲 (著名寫手)
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