CATALYTIC REACTOR CONFIGURATION AND PREPARATION, AND METHOD FOR DIRECTLY SYNTHESIZING ETHYLENE BY CATALYZING METHANE UNDER OXYGEN-FREE CONDITION

• Main Authors: TAN, Dali, MENG, Jingheng, BAO, Xinhe, GUO, Xiaoguang, FANG, Guangzong, YU, Qinqin, PAN, Xiulian
• Format: Patent
• Language: English; French; German
• Published: 06.03.2019
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a catalytic reactor configuration, preparation and a method of direct synthesis of ethylene through oxygen-free catalysis of methane. The reactor configuration comprises an inlet section I, a preheating section II, a transition section III, a reaction section IV and an outlet section V; except for the preheating section II and the reaction section IV, the existence of the inlet section I, the transition section III and the outlet section V depends on reaction conditions; and the process realizes no coke deposition synthesis of methane and high selectivity synthesis of ethylene. In the present invention, the methane conversion rate is 20-90%; ethylene selectivity is 65-95%; propylene and butylene selectivity is 5-25%; aromatic hydrocarbon selectivity is 0-30%; and coke deposition is zero. The present invention has the characteristics of long life of catalysts (>1000 h), high stability of redox and hydrothermal conditions at high temperature (<1700°C), high conversion rate of methane, high selectivity of products, zero coke deposition, no scaleup of catalyst, small industrialization difficulty, easy separation of products, good process reproducibility, safe and reliable operation and the like, and has wide industrial application prospect.