نتایج جستجو برای: h zsm 5 catalyst
تعداد نتایج: 1661707 فیلتر نتایج به سال:
Desilication of commercial MFI-type (ZSM-5) zeolites in solutions of alkali metal hydroxides is demonstrated to generate highly selective heterogeneous catalysts for the aqueous-phase isomerization of biobased dihydroxyacetone (DHA) to lactic acid (LA). The best hierarchical ZSM-5 sample attains a LA selectivity exceeding 90 %, which is comparable to that of the state-of-the-art catalyst (i.e.,...
This work examined the location-steered catalytic behavior of Mo/ZSM-5 catalyst for one-step methane dehydroaromatization to benzene reaction. The results indicated that α-site is preferred location formation of...
A time- and space-resolved deactivation study on the conversion of glycerol to aromatics over H-ZSM-5 was performed. For this purpose, vaporized/pyrolyzed in a pyrolysis section followed by catalytic aromatization step. Benchmark performance showed an induction period ca. 20 min, rather constant BTX yield 25.4 ± 2.2C.% for 3–4 h time stream (TOS). Subsequently, rapid drop observed due catalyst ...
The structure and reactivity of a room temperature stable zinc carbonyl complex in Zn-modified H-ZSM-5 zeolite were revealed by solid-state NMR spectroscopy.
Transformation of lignocellulosic biomass into high-value chemicals is a viable strategy for sustainable development bio-based economy. 5-Hydroxymethylfurfural (HMF) one potential platform bio-chemicals the manufacture various renewable products. In this work, commercial H-ZSM-5 zeolite was used as starting material preparing series acid catalysts with bifunctionality direct dehydration glucose...
هدف از اجرای این پروژه، اصلاح کاتالیست زئولیت تجاری، ساخت کاتالیست قابل رقابت با نمونه های تجاری و تعیین نقاط بهینه شرایط عملیاتی واکنش سنتز غیرمستقیم دی متیل اتر از آبگیری متانول می باشد. در مطالعه حاضر ابتدا یک کاتالیست زئولیت تجاری مناسب از میان چندین نمونه انتخاب و سپس با افزودن سدیم بهینه گردیده است. سپس کاتالیست مناسب h-zsm-5 با روش هیدروترمال ساخته شده و آنگاه واکنش تولید dme، در یک راکت...
Ex-situ catalytic pyrolysis of pure glycerol to bio-aromatics over an un-modified H-ZSM-5 zeolite. • The conversion aromatics (BTX) with zeolite was investigated. An ex-situ approach used a separate and upgrading unit. A BTX peak carbon yield 28.1 ± 0.2% obtained. Catalyst performance for 5 reaction/regeneration cycles determined. Irreversible catalyst deactivation observed due dealumination th...
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