使用双峰多孔MgAl 2 O 4负载的Pt-Ni纳米颗粒对甘油进行蒸汽重整以生产合成气,Energy & Fuels

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使用双峰多孔MgAl ₂ O ₄负载的Pt-Ni纳米颗粒对甘油进行蒸汽重整以生产合成气
Energy & Fuels ( IF 5.2 ) Pub Date : 2021-03-01 , DOI: 10.1021/acs.energyfuels.0c03954
Sweeta Kotnala ₁ , Lovjeet Singh ₁ , Jyoti Gahtori ₁ , Chelesea Tucker ₂ , Arun Kumar ₁ , Eric Van Steen ₂ , Ankur Bordoloi ₁

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甘油的蒸汽重整通常用于生成绿色氢；然而，在此，已经做出努力以生产可以有效地用于下游工艺如甲醇或FT合成的有效合成气组合物。选择了一种简便的沉淀-沉积方法，将Pt-Ni纳米颗粒沉积在双模多孔MgAl ₂ O _4上，该双模多孔MgAl ₂ O _4是通过模板辅助溶剂热法合成的。这些新开发的材料已成功用于甘油的蒸汽重整以生产合成气。镁铝₂ O ₄制备的MgO含量在10到30 wt％之间，具有恒定的Pt（1 wt％）和Ni（5 wt％）。通过N ₂吸附，X射线衍射（XRD），程序升温还原（TPR），透射电子显微镜（TEM），X射线对所有合成材料进行详细表征，以阐明其理化性质，形态和表面性质光电子能谱（XPS），电感耦合等离子体-原子发射光谱（ICP-AES）和程序升温脱附（CO ₂ -TPD）技术。含有30 wt％MgO的催化剂产生的合成气比约为3，CO _2的量最少在850°C下。评估了所有主要参数的影响，以最大限度地提高催化剂性能，例如反应温度，进料速率，时空和进料摩尔比。该催化剂表现出高活性，甘油的转化率接近于1，并且发现该催化剂在高温下的甘油重整中是稳定的。为了了解催化剂的失活，已通过XRD，TEM，XPS和TGA / DTA分析对废催化剂进行了进一步检查。对用过的催化剂的分析证实了高骨架稳定性，少量碳质沉积物以及高抗金属氧化性。

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Steam Reforming of Glycerol for Syngas Production using Pt–Ni Nanoparticles Supported on Bimodal Porous MgAl2O4

Steam reforming of glycerol is often applied for the generation of green hydrogen; however, here, an effort has been made to produce an efficient syngas composition that can utilize effectively for downstream processes like methanol or FT synthesis. A facile precipitation–deposition approach has been chosen to deposit Pt–Ni nanoparticles on bimodel porous MgAl₂O₄, synthesized by a template-assisted solvothermal method. These newly developed materials are used successfully for steam reforming of glycerol for syngas production. The MgAl₂O₄ was prepared with different MgO contents between 10 and 30 wt % with a constant Pt (1 wt %) and Ni (5 wt %). All the synthesized materials were characterized in detail to elucidate their physicochemical properties, morphologies, and surface properties via N₂ sorption, X-ray diffraction (XRD), temperature-programmed reduction (TPR), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), inductively coupled plasma–atomic emission spectroscopy (ICP-AES), and temperature programmed desorption (CO₂-TPD) techniques. The catalyst containing 30 wt % MgO produced a syngas ratio of ∼3 and a minimal amount of CO₂ at 850 °C. The influence of all major parameters was evaluated to maximize the catalyst performance, such as reaction temperature, feed rate, space–time, and feed molar ratios. The catalyst exhibited a high activity with a conversion of glycerol close to unity, and the catalysts were found to be stable in glycerol reforming at high temperatures. To understand the catalyst deactivation, spent catalysts have been further examined through XRD, TEM, XPS, and TGA/DTA analysis. The analysis of the used catalyst confirms the high framework stability, low amount of carbonaceous deposits, and high resistance to metal oxidation.

更新日期：2021-03-18

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