Phichairatanaphong Orrakanya, Yigit Nevzat, Wicht Thomas, Kuboon Sanchai, Witoon Thongthai, Rupprechter Günther, Chareonpanich Metta, Donphai Waleeporn
KU-Green Catalysts Group, Department of Chemical Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand.
Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9/BC/01, Vienna 1060, Austria.
Ind Eng Chem Res. 2025 Jun 9;64(24):11782-11793. doi: 10.1021/acs.iecr.5c00941. eCollection 2025 Jun 18.
The dry reforming reaction offers a promising pathway to transform CO and CH gases into H and CO, which serve as vital reactants and fuel gases in various industrial chemical processes. This research focused on the modification of Ni-based catalysts with alkaline earth metal for a dry reforming reaction. Nickel impregnated into mixed MgCeAl (MCA) oxide supports, tailored with calcium (Ca), was fabricated through a soft template-assisted coprecipitation technique, employing cetyltrimethylammonium chloride (CTAC) as the template. The calcium modification of MCA oxides supporting the nickel catalyst augmented the reducibility of nickel and intensified the interaction between nickel and the oxide support. In evaluating performance, Ni/0.3Ca-MCA catalyst demonstrated superior CH and CO conversions, an optimal H/CO ratio, and enhanced stability compared to other catalysts. This improvement can be attributed to the Ca addition, which likely enhances the basic sites on the catalyst, promoting CO adsorption and its simultaneous dissociation and thereby reducing coke formation.
干重整反应为将一氧化碳和甲烷气体转化为氢气和一氧化碳提供了一条有前景的途径，氢气和一氧化碳在各种工业化学过程中作为重要的反应物和燃料气体。本研究聚焦于用碱土金属改性镍基催化剂用于干重整反应。通过软模板辅助共沉淀技术，以十六烷基三甲基氯化铵（CTAC）为模板，制备了负载在经钙（Ca）改性的混合氧化镁铈铝（MCA）氧化物载体上的镍。MCA氧化物负载镍催化剂的钙改性提高了镍的还原性，并增强了镍与氧化物载体之间的相互作用。在性能评估中，与其他催化剂相比，Ni/0.3Ca-MCA催化剂表现出优异的甲烷和一氧化碳转化率、最佳的氢/一氧化碳比以及更高的稳定性。这种改进可归因于钙的添加，钙可能增强了催化剂上的碱性位点，促进了一氧化碳的吸附及其同时解离，从而减少了焦炭的形成。
