Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing ethylene, aromatic hydrocarbon and hydrogen by directly converting methane under anaerobic condition with photovoltaic polysilicon cutting waste material as catalyst

A catalytic conversion and catalyst technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high production cost and cumbersome process, and achieve easy separation, wide sources and low price Effect

Active Publication Date: 2016-04-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the indirect methane conversion process is cumbersome, the production cost is high, and a large amount of greenhouse gas CO is produced in the process. 2 , so the construction of direct utilization of methane into high value-added chemical products (especially hydrocarbons represented by ethylene and aromatics) has always been the focus of attention

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing ethylene, aromatic hydrocarbon and hydrogen by directly converting methane under anaerobic condition with photovoltaic polysilicon cutting waste material as catalyst
  • Method for preparing ethylene, aromatic hydrocarbon and hydrogen by directly converting methane under anaerobic condition with photovoltaic polysilicon cutting waste material as catalyst
  • Method for preparing ethylene, aromatic hydrocarbon and hydrogen by directly converting methane under anaerobic condition with photovoltaic polysilicon cutting waste material as catalyst

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] 1. Catalyst preparation

[0030] The prepared photovoltaic polysilicon cutting waste catalysts all need to go through the process of catalyst pre-selection and selection.

[0031] The photovoltaic polysilicon cutting waste raw material used in the catalyst preparation process is a brown powdery substance, and its main components are silicon carbide (SiC), iron (Fe), polyethylene glycol (PEG) and silicon powder (Si). The proportions are SiC (47-52%), Fe (4-6%), PEG (1-2%) and Si (40-48%).

Embodiment 1

[0033] Accurately weigh 10g of photovoltaic polysilicon cutting waste raw material, add 200mL of ethanol and 400mL of acetone and (1:2) mixed solvent, stir magnetically for 12h, then use filtration to remove residual solvent, and dry the obtained sample at 120°C for 24h in an air atmosphere. Obtain the desired photovoltaic polysilicon cutting waste catalyst A.

Embodiment 2

[0035] Weigh 5g of the photovoltaic polysilicon cutting waste A obtained according to Example 1, add 300mL of nitric acid solution with a mass concentration of 10%, magnetically stir for 12h, and then remove residual solvent by filtration and separation, and dry the obtained sample at 120°C for 24h in an air atmosphere , to obtain the desired photovoltaic polysilicon cutting waste catalyst B.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for directly preparing ethylene, aromatic hydrocarbon and hydrogen by catalyzing methane under an anaerobic continuous flow condition with a photovoltaic polysilicon cutting waste material as a catalyst. With the process, economical utilization of the cheap photovoltaic polysilicon cutting waste material is realized. The obtained products are all basic chemical raw materials needed by industries. Under a fixed-bed reaction mode, a reaction temperature is 750-1200 DEG C, a reaction pressure is normal pressure, and a reaction raw material gas mass space velocity is 1000-30000mL / g / h. A methane conversion rate is 3-30%; an olefin selectivity is 10-30%; and an aromatic hydrocarbon selectivity is 10-50%. With the method, the photovoltaic polysilicon cutting waste material which will cause atmospheric pollution is fully utilized. The source of the catalyst is wide, and the price is low. The product is easy to separate; the process has good repeatability; and the operation is safe and reliable.

Description

technical field [0001] The invention relates to a method in which photovoltaic polysilicon cutting waste is used as a catalyst to catalyze methane to directly produce ethylene, aromatics and hydrogen under the condition of anaerobic continuous flow. This process realizes the economical utilization of cheap photovoltaic polysilicon cutting waste, and the obtained products are required by industry basic chemical raw materials. Background technique [0002] Natural gas is a clean, high-quality and efficient new energy source, and its main component is methane (CH 4 ). Against the backdrop of the depletion of fossil energy represented by petroleum, governments of various countries are actively seeking new alternative energy sources with high efficiency and low pollution. Therefore, the utilization and development of natural gas has gradually come into people's sight. In recent years, the discovery of hydrated methane compounds in shale gas and seabed sediments in North America...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07C2/84C07C11/04C07C15/00C01B3/02B01J37/06B01J27/224
CPCY02A50/20Y02P20/52
Inventor 包信和叶益凡郭晓光
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com