镁铝混合氧化物催化剂中锶改性对乙醇催化反应产物分布的影响。
Effect of Strontium Modification in Mg-Al Mixed Oxide Catalysts on Product Distribution toward Catalytic Reaction of Ethanol.
作者信息
Seekhiaw Patchaporn, Jantasee Sasiradee, Praserthdam Piyasan, Jongsomjit Bunjerd
机构信息
Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
Bio-Circular-Green-Economy Technology & Engineering Center (BCGeTEC), Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand.
出版信息
ACS Omega. 2023 Aug 29;8(36):32775-32783. doi: 10.1021/acsomega.3c03752. eCollection 2023 Sep 12.
The aim of this research was to examine the effect of strontium content in the MgAlO catalyst for the catalytic ethanol reaction on the product distribution. The structure of the catalysts and the actual amount of strontium on the catalysts were verified using XRD and ICP techniques, respectively. The acid and basic strength characteristics of catalysts were examined using NH-TPD and CO-TPD techniques, respectively. The strontium content was found to influence the textural properties and the acidic and basic characteristics of the catalysts, leading to differences in product selectivity and ethanol conversion. The MgAlO catalyst with 1.9 wt % strontium provided the maximum ethylene and butanol selectivity, probably due to the presence of appropriate medium acidic and strong basic sites. All catalysts can efficiently produce ethylene by a dehydration reaction and acetaldehyde by a dehydrogenation reaction. Acetaldehyde selectivity was dominant with increased strontium loading.
本研究的目的是考察MgAlO催化剂中锶含量对乙醇催化反应产物分布的影响。分别采用XRD和ICP技术对催化剂的结构和催化剂上锶的实际含量进行了验证。分别采用NH-TPD和CO-TPD技术考察了催化剂的酸碱强度特性。发现锶含量会影响催化剂的织构性质以及酸碱特性，从而导致产物选择性和乙醇转化率的差异。含1.9 wt%锶的MgAlO催化剂具有最高的乙烯和丁醇选择性，这可能是由于存在适当的中强酸和强碱位点。所有催化剂都能通过脱水反应高效地生成乙烯，并通过脱氢反应生成乙醛。随着锶负载量的增加，乙醛选择性占主导地位。
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