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Ni-phyllosilicate structure derived Ni–SiO2–MgO catalysts for bi-reforming applications: acidity, basicity and thermal stability†
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-02-19 00:00:00 , DOI: 10.1039/c7cy02475d J. Ashok 1, 2, 3, 4 , Z. Bian 1, 2, 3, 4 , Z. Wang 1, 2, 3, 4 , S. Kawi 1, 2, 3, 4
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2018-02-19 00:00:00 , DOI: 10.1039/c7cy02475d J. Ashok 1, 2, 3, 4 , Z. Bian 1, 2, 3, 4 , Z. Wang 1, 2, 3, 4 , S. Kawi 1, 2, 3, 4
Affiliation
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In this work, Ni–SiO2–MgO materials synthesized via Ni-phyllosilicate (PS) intermediates were explored for bi-reforming of methane (BRM) reaction. The influence of steam and reaction temperature was also investigated for the BRM reaction. Overall, the 15 wt% Ni–30 wt% SiO2–55 wt% MgO (Ni–SiO2–MgO[55]) catalyst maintained exceptional catalytic performance (CH4 and CO2 conversions were 80% and 60%, respectively) at 750 °C for 140 h with negligible carbon deposition and also showed a stable H2/CO of 2.0. The best catalytic performance of the Ni–SiO2–MgO[55] catalyst is attributed to its enhanced basicity strength, reasonable moderate acidity strength and structural stability during high temperature reforming reaction. The formation and presence of Ni–Mg-containing phyllosilicates in fresh and reduced catalysts respectively was confirmed by TEM images and XRD analysis. The Tmax of around 750 °C in TPR profiles of Ni/SiO2–MgO catalysts further confirms the strength of interactions between Ni and SiO2–MgO support species.
中文翻译：
镍-叶硅酸盐结构衍生的用于重整应用的Ni-SiO 2 -MgO催化剂：酸度，碱度和热稳定性†
在这项工作中，对通过Ni-页硅酸盐（PS）中间体合成的Ni-SiO 2 -MgO材料进行了甲烷（BRM）反应的双重整研究。还研究了蒸汽和反应温度对BRM反应的影响。总体而言，15 wt％的Ni–30 wt％的SiO 2 –55 wt％的MgO（Ni–SiO 2 –MgO [55]）催化剂保持了出色的催化性能（CH 4和CO 2的转化率分别为80％和60％）在750°C下放置140小时，碳沉积量可忽略不计，并且H 2 / CO稳定为2.0。Ni-SiO 2的最佳催化性能–MgO [55]催化剂具有增强的碱度强度，合理的适度酸度强度和高温重整反应过程中的结构稳定性。TEM和XRD分析证实了新鲜催化剂和还原催化剂中含Ni-Mg的层状硅酸盐的形成和存在。Ni / SiO 2 -MgO催化剂的TPR曲线中的T max约为750°C，进一步证实了Ni与SiO 2 -MgO载体物种之间的相互作用强度。
更新日期：2018-02-19
中文翻译：
镍-叶硅酸盐结构衍生的用于重整应用的Ni-SiO 2 -MgO催化剂：酸度，碱度和热稳定性†
在这项工作中，对通过Ni-页硅酸盐（PS）中间体合成的Ni-SiO 2 -MgO材料进行了甲烷（BRM）反应的双重整研究。还研究了蒸汽和反应温度对BRM反应的影响。总体而言，15 wt％的Ni–30 wt％的SiO 2 –55 wt％的MgO（Ni–SiO 2 –MgO [55]）催化剂保持了出色的催化性能（CH 4和CO 2的转化率分别为80％和60％）在750°C下放置140小时，碳沉积量可忽略不计，并且H 2 / CO稳定为2.0。Ni-SiO 2的最佳催化性能–MgO [55]催化剂具有增强的碱度强度，合理的适度酸度强度和高温重整反应过程中的结构稳定性。TEM和XRD分析证实了新鲜催化剂和还原催化剂中含Ni-Mg的层状硅酸盐的形成和存在。Ni / SiO 2 -MgO催化剂的TPR曲线中的T max约为750°C，进一步证实了Ni与SiO 2 -MgO载体物种之间的相互作用强度。
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