新开发的掺杂过渡金属的 HZSM-5 沸石催化剂在将 C1-C3 醇单步转化为燃料级碳氢化合物中的性能评估

IF 3.2 Q2 CHEMISTRY, PHYSICAL
Energy advances Pub Date : 2024-05-29 DOI:10.1039/D3YA00460K
Ifeanyi Michael Smarte Anekwe, Bilainu Oboirien and Yusuf Makarfi Isa
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引用次数: 0

摘要

本研究调查了掺杂金属的 HZSM-5 催化剂在低醇转化为碳氢化合物(LATH)中的性能。对催化剂(包括未改性 HZSM-5 和金属改性(镍、铁和钴)HZSM-5)在 350 和 400 °C、7 和 12 h-1 的空间速度下进行了 LATH 转化评估。采用了 XRD、FTIR、SEM-EDS、PSD、N2 吸附和 TGA-DTA 等表征技术。表征结果表明,金属成功地掺入了 HZSM-5 载体催化剂中。对 LATH 转化催化剂性能的整体评估表明,与未改性催化剂相比,掺杂金属的催化剂明显更偏向于液态烃,平均低醇转化率为 99%。其中,Co/HZSM-5 和 Fe/HZSM-5 对 C5-C8 (62.81% 和 54.95%)有明显的偏好,而 Ni/HZSM-5 则改善了 C9-C12 (11.40%)、C12+ (20.91%)和 BTX (7.01%)的合成。对焦炭沉积的研究表明,Ni/HZSM-5 具有稳定性,焦炭形成极少,而 Co/HZSM-5 在 MTH 和 ETH 转化中分别具有较高的焦炭沉积和失活倾向。Co/HZSM-5 的失重率最低,而 Fe/HZSM-5 在 PTH 转化中的稳定性较低。值得注意的是,Ni/HZSM-5 在 LATH 转化中表现出卓越的稳定性和性能。这些发现有助于催化技术的进步和向可持续能源未来的过渡。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Performance evaluation of a newly developed transition metal-doped HZSM-5 zeolite catalyst for single-step conversion of C1–C3 alcohols to fuel-range hydrocarbons†

Performance evaluation of a newly developed transition metal-doped HZSM-5 zeolite catalyst for single-step conversion of C1–C3 alcohols to fuel-range hydrocarbons†

Performance evaluation of a newly developed transition metal-doped HZSM-5 zeolite catalyst for single-step conversion of C1–C3 alcohols to fuel-range hydrocarbons†

This study investigated the performance of metal-doped HZSM-5 catalysts in the conversion of low alcohols to hydrocarbons (LATH). Catalysts, including unmodified HZSM-5 and metal-modified (Ni, Fe, and Co) HZSM-5, were evaluated at 350 and 400 °C with space velocities of 7 and 12 h−1 for LATH conversion. Characterisation techniques such as XRD, FTIR, SEM-EDS, PSD, N2 adsorption, and TGA-DTA were employed. The characterisation results showed the successful metal incorporation in the HZSM-5 support catalyst. The overall evaluation of catalyst performance for LATH conversion revealed that the metal-doped catalysts showed a clear preference for liquid hydrocarbons with >99% average low alcohol conversion compared to the unmodified catalysts. In particular, Co/HZSM-5 and Fe/HZSM-5 showed a considerable preference for C5–C8 (62.81% and 54.95%), while Ni/HZSM-5 improved the synthesis of C9–C12 (11.40%), C12+ (20.91%) and BTX (7.01%). The study on coke deposition indicated that Ni/HZSM-5 exhibited stability with minimal coke formation, while Co/HZSM-5 experienced higher coke deposition and deactivation tendencies in MTH and ETH conversions, respectively. Co/HZSM-5 exhibited the lowest weight loss, whereas Fe/HZSM-5 showed lower stability in PTH conversion. Notably, Ni/HZSM-5 demonstrated remarkable stability and performance in LATH conversion. These findings contribute to the advancement of catalysis and the transition towards a sustainable energy future.

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