Method for preparing higher hydrocarbons by low-temperature conversion of methane

A low-temperature conversion, high-level hydrocarbon technology, applied in chemical instruments and methods, treatment of hydrocarbon oil, hydrocarbon oil treatment products, etc., can solve the problems of catalyst preparation and difficult to achieve reaction conditions, catalyst carbon deposition deactivation and other problems, achieve long life, Good product selectivity

Active Publication Date: 2019-03-05
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods greatly increase the conversion rate of methane, the preparation of the catalyst and the reaction conditions in this reaction are difficult to achieve in the industry
Liu (stud.surf.sci.catal.119 (1998) 241-246) et al. designed a reactor to combine H 2 Removed from the reaction system, although this increases the conversion rate of methane, but a large amount of carbon deposits make the catalyst deactivated by carbon deposits in a short time

Method used

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  • Method for preparing higher hydrocarbons by low-temperature conversion of methane
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  • Method for preparing higher hydrocarbons by low-temperature conversion of methane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The carrier of catalyst among the present invention can adopt commercially available product, also can prepare according to following method:

[0030] Take 25.074g template agent tetrapropylammonium hydroxide (abbreviation: TPAOH), add it to 48.400g water, stir magnetically at room temperature, then add 0.938g aluminum nitrate, stir until completely dissolved, then add 20.833g ethyl orthosilicate (abbreviation: TEOS) and stirring continuously, after stirring for 20 hours, let it stand for 4 hours to obtain the synthetic solution; slowly introduce the synthetic solution into a stainless steel autoclave with a polytetrafluoroethylene liner, and seal it; then, place the stainless steel autoclave in Take it out after crystallization in an oven at 120°C for 120 hours, and rapidly cool to room temperature; the obtained product is repeatedly washed with deionized water until the pH value is 9-10, centrifuged, and the solid product is separated, and the obtained solid product is...

Embodiment 2

[0032] The carrier of catalyst among the present invention can adopt commercially available product, also can prepare according to following method:

[0033]Take 25.074g of template agent TPAOH, add it to 48.400g of water, stir magnetically at room temperature, then add 0.750g of aluminum nitrate, stir until completely dissolved, then add 20.833g of TEOS and keep stirring, after stirring for 20h, let it stand for 4h to obtain the synthetic The synthetic solution was slowly introduced into a stainless steel autoclave lined with polytetrafluoroethylene, and sealed; then, the stainless steel autoclave was placed in an oven at 120°C for crystallization for 120 hours, then taken out, and rapidly cooled to room temperature; the obtained product was used Rinse with ionized water repeatedly until the pH value is 9-10, centrifuge to separate the solid product, place the obtained solid product in an oven at 100°C, then heat up to 500°C in a muffle furnace at 2°C / min, and roast for 2 hour...

Embodiment 3

[0035] The carrier of catalyst among the present invention can adopt commercially available product, also can prepare according to following method:

[0036] Take 25.074g of template agent TPAOH, add it to 48.400g of water, stir magnetically at room temperature, then add 0.469g of aluminum nitrate, stir until it is completely dissolved, then add 20.833g of TEOS to the solution and keep stirring, after stirring for 20h, add ethylene glycol 90.79ml of alcohol was stirred for 30min and left to stand for 4h to obtain a synthetic solution, which was slowly introduced into a stainless steel autoclave with polytetrafluoroethylene and sealed; then, the stainless steel autoclave was placed in an oven at 120°C for 120h of crystallization Take it out and cool it down to room temperature; the obtained product is repeatedly washed with deionized water until the pH value is 9-10, centrifuged, and the solid product is separated, and the obtained solid product is placed in an oven at 100 ° C, ...

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Abstract

The invention discloses a method for preparing higher hydrocarbons by low-temperature conversion of methane. The method comprises the steps of: placing a catalyst in a fixed bed reactor, introducing methane, and conducting reaction at 400 to 600 DEG C to obtain alkanes, olefins and aromatic hydrocarbons. The method of the invention can complete the conversion of methane at 400-600 DEG C to form achemical raw material with high added value (for example: ethylene, BTX, etc.); the product has good selectivity, for example, BTX has selectivity of 60% or above; and a catalyst with a long service life can continuously reacts for 60 hours without inactivation.

Description

technical field [0001] The invention relates to a method for preparing hydrocarbons by converting methane, in particular to a method for preparing higher hydrocarbons by converting methane at low temperature. Background technique [0002] The worldwide discovery of shale gas and methane hydrate deposited on the seabed has changed the global energy storage landscape. The main component of these energy sources is methane, so the effective use of methane has attracted widespread attention from scientists and energy companies. [0003] The conversion of methane can be divided into indirect conversion and direct conversion. Indirect conversion refers to the conversion of methane into synthesis gas and then into chemical products; direct conversion refers to the direct conversion of methane into high value-added chemical products. The direct conversion of methane is more atom efficient and requires less energy. Therefore, for the effective utilization of natural gas, the direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03B01J29/068B01J29/072C10G50/00
CPCB01J29/0325B01J29/0333B01J29/068B01J29/072C10G50/00C10G2400/20C10G2400/30Y02P30/40
Inventor 张燚徐晋刘意
Owner BEIJING UNIV OF CHEM TECH
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