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Effect of Sr Incorporation and Ni Exsolution on Coke Resistance of the Ni/Sr–Al2O3 Catalyst for Dry Reforming of Methane
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-11-30 , DOI: 10.1021/acssuschemeng.3c05275 Jeongmin Kim 1 , Jeong-Cheol Seo 2 , Won-Jun Jang 3 , Kyubock Lee 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-11-30 , DOI: 10.1021/acssuschemeng.3c05275 Jeongmin Kim 1 , Jeong-Cheol Seo 2 , Won-Jun Jang 3 , Kyubock Lee 1
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The effects of Sr incorporation over Ni/Al2O3 catalysts were explored for the dry reforming of methane (DRM). Ni-exsolved catalysts (NiEXS) and conventional Ni-impregnated catalysts (NiIMP) were prepared by using a spray-pyrolysis-assisted evaporation-induced self-assembly (EISA) method to produce a solid solution and mesoporous structures. In the DRM tests, strontium showed crucial effects for improving the resistance of carbon formation and the stability of the catalyst. Particularly, NiEXS/Sr–Al demonstrated a crystal size growth of 0.8% and a coking rate of 0.012 gc·gcat–1·h–1, which was remarkably lower than those of the other catalysts (NiIMP/Al, NiIMP/Sr–Al, and NiEXS/Al). This study primarily investigated the catalytic properties and strong metal–support interaction, which depended on the preparation procedure, for verifying the origin of the most stable NiEXS/Sr–Al catalyst. In particular, the roles of promotional Sr in enhancing the CO2 adsorption/desorption ability of the catalyst at different temperatures as well as the amount of oxygen species were elucidated in detail.
中文翻译：
Sr掺入和Ni溶出对甲烷干重整Ni/Sr-Al2O3催化剂抗积炭性能的影响
研究了在 Ni/Al 2 O 3催化剂上掺入 Sr 对甲烷干重整 (DRM)的影响。采用喷雾热解辅助蒸发诱导自组装（EISA）方法制备了镍溶出催化剂（Ni EXS）和传统镍浸渍催化剂（Ni IMP ），以产生固溶体和介孔结构。在DRM测试中，锶对于提高抗碳形成能力和催化剂的稳定性表现出至关重要的作用。特别是，Ni EXS /Sr–Al 的晶体尺寸增长了 0.8%，结焦率为 0.012 g c ·g cat –1 ·h –1，明显低于其他催化剂（Ni IMP /Al、 Ni IMP /Sr–Al 和 Ni EXS /Al)。本研究主要研究了取决于制备程序的催化性能和强金属-载体相互作用，以验证最稳定的 Ni EXS /Sr-Al 催化剂的来源。特别是，详细阐明了促进Sr在提高不同温度下催化剂的CO 2吸附/解吸能力以及氧物种数量方面的作用。
更新日期：2023-11-30
中文翻译：
Sr掺入和Ni溶出对甲烷干重整Ni/Sr-Al2O3催化剂抗积炭性能的影响
研究了在 Ni/Al 2 O 3催化剂上掺入 Sr 对甲烷干重整 (DRM)的影响。采用喷雾热解辅助蒸发诱导自组装（EISA）方法制备了镍溶出催化剂（Ni EXS）和传统镍浸渍催化剂（Ni IMP ），以产生固溶体和介孔结构。在DRM测试中，锶对于提高抗碳形成能力和催化剂的稳定性表现出至关重要的作用。特别是，Ni EXS /Sr–Al 的晶体尺寸增长了 0.8%，结焦率为 0.012 g c ·g cat –1 ·h –1，明显低于其他催化剂（Ni IMP /Al、 Ni IMP /Sr–Al 和 Ni EXS /Al)。本研究主要研究了取决于制备程序的催化性能和强金属-载体相互作用，以验证最稳定的 Ni EXS /Sr-Al 催化剂的来源。特别是，详细阐明了促进Sr在提高不同温度下催化剂的CO 2吸附/解吸能力以及氧物种数量方面的作用。
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