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Investigation into 1,3-butadiene and other bulk chemicals' formation from bioethanol over Mg–Al catalysts

机译：Mg-Al催化剂上生物乙醇对1,3-丁二烯及其他大宗化学物质形成的研究

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Mg–Al catalysts were adopted in the direct synthesis of 1,3-butadiene and other bulk chemicals from bioethanol. The influence of MgO content and sample calcination temperature on the catalytic performance was investigated. The optimization of reaction conditions for 1,3-butadiene, ethylene and 1-butanol, including reaction temperatures and the feed rate of ethanol, was also carried out. The catalysts were characterized by X-ray diffraction, nitrogen sorption, SEM, NH3-TPD, CO2-TPD and FTIR of adsorbed pyridine. On the basis of these analysis results and catalytic performance of yielding 1,3-butadiene, both the MgO content and the calcination temperature play a great role on the nature of acid and basic sites, then the proper active sites for producing 1,3-butadiene and other important chemicals such as ethylene and 1-butanol have been elaborated. The balance of moderate acid–basic sites is crucial to production of 1,3-butadiene from ethanol. Ethylene is obtained on strong acid and strong basic sites. 1-Butanol tends to form on the strong basic sites. To further improve the target product selectivity, modifiers adjusting the balance of acidity–basicity need to be involved in the Mg–Al catalysts.
机译：Mg-Al催化剂用于从生物乙醇直接合成1,3-丁二烯和其他大宗化学品。研究了MgO含量和样品煅烧温度对催化性能的影响。还对1，3-丁二烯，乙烯和1-丁醇的反应条件进行了优化，包括反应温度和乙醇的进料速度。通过X射线衍射，氮吸附，SEM，NH 3 -smallTPD，CO 2 对催化剂进行了表征。 -吸附吡啶的TPD和FTIR。根据这些分析结果和生成1,3-丁二烯的催化性能，MgO含量和煅烧温度均对酸和碱性位点的性质起重要作用，然后对生成1,3-丁二烯的合适活性位点起重要作用。丁二烯和其他重要的化学物质，如乙烯和1-丁醇已被精心设计。中等酸碱位的平衡对于从乙醇生产1,3-丁二烯至关重要。乙烯是在强酸和强碱性位点获得的。 1-丁醇倾向于在强碱性部位形成。为了进一步提高目标产品的选择性，Mg-Al催化剂中需要使用调节酸碱度平衡的改性剂。

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