نتایج جستجو برای: hzsm 5

تعداد نتایج: 1215774  

Journal: :ChemSusChem 2015
Youngbo Choi Hongseok Park Yang Sik Yun Jongheop Yi

Hierarchical porous catalysts have recently attracted increasing interest because of the enhanced accessibility to active sites on such materials. In this context, previously reported hierarchically mesoporous ASN and ASPN materials are evaluated by applying them to the dehydration of glycerol, and demonstrate excellent catalytic performance. In addition, a comprehensive understanding of the ef...

Journal: :Cell reports physical science 2021

Summary Molybdenum supported on zeolite HZSM-5 is the most studied catalyst for methane dehydroaromatization. However, nature of its catalytic sites and their deactivation mechanisms remain unclear controversial. Here, we report further insights into this system: first, crystal size determines form location active MoCx species, thus performance; second, are preferentially deactivated over acid ...

2004
Dmitri A. Bulushev Lioubov Kiwi-Minsker Albert Renken

The dynamics of N2O decomposition to gaseous nitrogen and oxygen over HZSM-5 catalysts with a low iron content (200 and 1000 ppm) was studied by the transient response method in the temperature range 523–653 K. The active catalysts were prepared from HZSM-5 with Fe in the framework on its steaming at 823 K followed by thermal activation in He at 1323 K. Two main steps were distinguished in the ...

2015
Yujing Weng Songbai Qiu Longlong Ma Qiying Liu Mingyue Ding Qian Zhang Qi Zhang Tiejun Wang Rafael Luque

Aromatics and cyclic-hydrocarbons are the significant components of jet fuel with high energy-density. However, conventional technologies for bio-fuel production cannot produce these products without further aromatization and isomerization. In this work, renewable liquid fuel with high content of aromatics and cyclic-hydrocarbons was obtained through aqueous catalytic conversion of biomass sorb...

2015
Thamer Adnan Abdullah

Due to crude oil is limited, new resources for fuel and petrochemicals are important to be developed. Biogas or NG (Natural Gas) can be easily converted into methanol which can be reacted over zeolite to produce olefins and gasoline. HZSM-5 zeolite catalyst has been used in this study and its modification by (0.5wt%, 1wt%, 2wt% and 4wt %) Ni to convert methanol to hydrocarbons (MTH). Catalysts ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده مهندسی شیمی 1392

با توجه به معایب شکست حرارتی، فرآیند اصلی تولید اولفین های سبک، در دهه ی اخیر تلاش های بسیاری به منظور تولید اتیلن و پروپیلن به روش شکست کاتالیزوری در مجاورت کاتالیزورzsm-5 صورت پذیرفته است. گازهای مایع پالایشگاهی (ال.پی.جی) سوخت مناسبی برای تولید انرژی محسوب می شود و با توجه به این که ترکیب این خوراک عمدتاً از پروپان و بوتان تشکیل شده است، می تواند منبع مهمی برای تولید اولفین های سبک باشد. یکی ...

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