成果報告書詳細
管理番号20100000001188
タイトル*平成21年度中間年報 「グリーン・サステイナブルケミカルプロセス基盤技術開発/触媒を用いる革新的ナフサ分解プロセス基盤技術開発/高性能ゼオライト触媒を用いる革新的ナフサ分解プロセスの開発」H21年度-H23年度
公開日2010/9/9
報告書年度2009 - 2009
委託先名触媒技術研究組合 独立行政法人産業技術総合研究所 国立大学法人東京工業大学 国立大学法人北海道大学 国立大学法人横浜国立大学
プロジェクト番号P09010
部署名環境技術開発部
和文要約和文要約等以下本編抜粋:1.研究開発の内容および成果等
「高性能ゼオライト触媒を用いる革新的ナフサ分解プロセスの開発」では、既存熱分解プロセスに対して、石油化学品(エチレン、プロピレン、ブテン、BTX等)の収率、選択性を高めるために必要な高性能なゼオライト触媒等の開発を行うとともに、ナフサ分解プロセス内のエネルギーバランス、分離工程におけるエネルギー消費に関するプロセス設計、最適化を行って、早期に革新的な実用化プロセスに繋がる基盤技術を開発する。
平成21年度実施計画に基づき高性能ゼオライト触媒を用いる革新的ナフサ分解プロセスの開発における研究開発成果を報告する。
英文要約The aim to develop high-performance zeolite catalysts that are able to produce useful petrochemicals such as ethylene, propylene, butenes and BTX from naphtha in higher yields and selectivity than the conventional thermal cracking processes. Simultaneously, fundamental technologies will be developed through process design and optimization with respect to energy balance in the naphtha cracking process and energy consumption in the separation/purification step to early reach the stage of practical application of innovative processes. In order to develop high-performance zeolite catalysts we have done screening of zeolites with various topologies to find the zeolites with outstanding catalytic properties using model molecules for naphtha. We have found that ZSM-5 (MFI), ferrierite (FER), and MCM-68 (MSE) show relatively high activities and selectivities for the desired products. Nano-sized zeolites were synthesized and put through the screening, which proved to be effective in improving the activity, selectivities and catalyst life. In a similar manner, silylation of external surface also favourably affected. Diffusion coefficients of model molecules inside the zeolite crystals were measured at elevated temperatures to obtain basic data as to the effect of the zeolite size on the rate of the reaction.With the aim of lengthening the catalyst life, the rate of coke formation was correlated with acid strength and pore size for several zeolites with different SiO2/Al2O3 ratios. By infrared (IR) spectroscopy using probe molecules the acid property of MFI zeolites was examined and adsorption of model molecules and their diffusion within pores at low temperatures were investigated to reveal the interaction of molecules and acid sites. To gain insight into the cracking reaction mechanism, in-situ IR measurements of chemical species formed during the reaction were also carried out at high temperature. Techniques to form the catalysts were also explored. The forming of the catalysts discovered at the Simple Chemistry Project such as La/P/ZSM-5 were examined in the cracking of naphtha and naphtha model compounds to study into the type and the amount of forming agents, forming conditions, pore-forming agents, and washing conditions. The base of simulation of the total system has been established to design the naphtha cracking process. Value added tables were prepared as a function of the operation variables such as the steam/oil ratio and the regeneration cycle, which provide the practical qualitative guidelines on the course of the catalyst development.
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