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美國(guó)麥克儀器給力科學(xué)研究-最新催化劑前沿研究：用于脂化生物柴油合成中游離酸的超高交聯(lián)聚苯乙烯磺酸催化劑

美國(guó)麥克儀器 2012-02-06 | 閱讀：1759

        隨著美國(guó)麥克儀器的市場(chǎng)份額的逐步壯大，美國(guó)麥克儀器已經(jīng)成為行業(yè)科學(xué)研究必備儀器，日前英國(guó)哈德斯菲爾德大學(xué)教授發(fā)表了一篇題為“用于脂化生物柴油合成中游離脂肪酸的超高交聯(lián)聚苯乙烯磺酸催化劑 ”學(xué)術(shù)文章，已經(jīng)被Applied Catalysis B: Environmental（115– 116 (2012) 261– 268）收錄，在該項(xiàng)研究中，美國(guó)麥克儀器ASAP 2020與DVS Advantage儀器成為表征催化劑最強(qiáng)有力的工具，為其研究提供了最具可信度的分析結(jié)果。以下列舉該文章的摘要以及鏈接供參考：
鏈接：
標(biāo)題：Hypercrosslinked polystyrene sulphonic acid catalysts for the esterification of free fatty acids in biodiesel synthesis

摘要：

New sulphonic acid catalysts supported on hypercrosslinked polystyrene have been studied in the esterification of oleic acid with methanol and in the rearrangement of α-pinene to camphene and limonenes. The catalysts have been characterised in terms of specific surface areas and porosities, affinities for water and for cylcohexane vapours, and both concentrations and strengths of acid sites. They have been compared with conventional macroporous polystyrene sulphonic acids (Amberlysts 15 and 35) and SAC-13, a composite between Nafion and silica. The results show that the hypercrosslinked polystyrene sulphonic acids, despite exhibiting relatively low concentrations of acid sites and acid site strengths below those of Amberlysts 15 and 35, are very much more catalytically active than conventional resins in reactions such as the esterification in which high acid site strengths are not required. It is thought that this is due to the highly accessible acid sites throughout the catalyst particles. Reusability studies are reported and it appears that the temperature at which the catalyst is used is important in controlling and minimising catalyst deactivation.

        美國(guó)麥克儀器公司是世界上第一家將自動(dòng)表面積分析儀、壓汞儀以及沉降式粒度分析儀投放市場(chǎng)的公司。公司主營(yíng)產(chǎn)品為研究級(jí)全自動(dòng)比表面積與孔隙度分析儀、多站比表面積與孔隙度分析儀、快速比表面積與孔隙度分析儀、流動(dòng)氣體法比表面分析儀、程序升溫化學(xué)吸附儀、化學(xué)吸附儀、壓汞儀、高壓吸附氣體吸附儀、蒸汽吸附儀、密度測(cè)量、顆粒技術(shù)和顆粒形態(tài)分析儀等各種材料表征儀器。

美國(guó)麥克儀器產(chǎn)品在1979年進(jìn)入中國(guó)市場(chǎng)，成為中美建交后最早進(jìn)入中國(guó)市場(chǎng)的分析儀器。在為中國(guó)用戶服務(wù)30多年后，于2011年3月在上海成立了麥克默瑞提克（上海）儀器有限公司，專業(yè)為中國(guó)市場(chǎng)提供美國(guó)麥克儀器公司的產(chǎn)品。公司總部設(shè)在上海，并在北京、廣州、西安分別設(shè)有辦公室，并設(shè)有應(yīng)用實(shí)驗(yàn)室提供各類儀器的演示與操作培訓(xùn)并提供對(duì)外做樣服務(wù)，為廣大用戶提供完整的實(shí)驗(yàn)室解決方案與疑難樣品的分析。