Electrically catalyzed process of preparing green fuel dimethyl ether with coarse ethanol product in hydrated proton reactor

Abstract

The process of preparing green fuel dimethyl ether with coarse ethanol product in an electrically catalyzed hydrated protonic reactor includes re-arranging ethanol molecule under the actions of electrode and double function metal-acid catalyst to obtain dimethyl ether product, and collecting dimethyl ether. The present invention uses material from biomass and has no fossil resource.

Description

technical field

[0001] The invention relates to a method for preparing green fuel dimethyl ether, and further relates to a method for rearranging crude ethanol electrocatalytic molecules into dimethyl ether. technical background

[0002] Energy issues are not only related to my country's rapid economic growth and sustainable social development, but also to national security and diplomatic strategies. Because fossil energy resources such as oil, coal and natural gas are limited and non-renewable resources, a large amount of exploitation and use will inevitably lead to the depletion of conventional energy sources in the future. With the increase of fossil fuel consumption, there are two outstanding problems in front of us: one is the increasingly serious environmental pollution, and the other is the depletion of existing fossil fuels on the earth. According to consumption calculations, the world's oil resources will eventually be exhausted in the next 50 to 80 years. On the ...

Examples

Embodiment 1

[0039] HZSM-5 (SiO 2 / Al 2 o 3 =50) by NaZSM-5 and 1mol·L -1 After being exchanged four times in ammonium nitrate solution, it was obtained by roasting at 600°C in air for 6h. The Mo / HZSM-5 catalyst was prepared by an equal impregnation method. A certain amount of HZSM-5 molecular sieve was impregnated in a quantitative ammonium paramolybdate solution (pH=6), stirred at room temperature for 30min, dried at 120°C for 10h, and air Calcined at 720°C for 8 hours to obtain Mo / HZSM-5 samples with desired Mo weight percentages of 1, 2, and 5.

Embodiment 2

[0041] Mix ZSM-5 (Si / Al=29, pore average diameter 0.60nm), alumina and Pd salt solution by kneading method, extrude into rods, dry and roast, and grind into 20-40 mesh particles. Catalysts with Pd mass fractions of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% were obtained.

Embodiment 3

[0043] Catalysts A and B prepared in Examples 1 and 2 were used to react in an electrocatalytic hydrated proton device. Catalyst loading: 1g. After the catalyst is loaded, 10L of 50% ethanol is added, the air is evacuated with an inert gas, the temperature is raised to 100° C. to start the reaction, and voltage is applied to the electrodes. The reaction pressure is 0.4MPa. Equilibrium was reached after 2 hours of reaction, and samples were taken for analysis. Product analysis was carried out by HP 6890D gas chromatograph, and ethanol, dimethyl ether and by-products were analyzed by hydrogen flame ionization detector and Porapak-N chromatographic column. The results are shown in Table 1. The resulting product was separated by compression to obtain dimethyl ether.

[0044] The reaction performance of table 1 bifunctional catalyst

[0045] catalyst

technical field

[0001] The invention relates to a method for preparing green fuel dimethyl ether, and further relates to a method for rearranging crude ethanol electrocatalytic molecules into dimethyl ether. technical background

[0002] Energy issues are not only related to my country's rapid economic growth and sustainable social development, but also to national security and diplomatic strategies. Because fossil energy resources such as oil, coal and natural gas are limited and non-renewable resources, a large amount of exploitation and use will inevitably lead to the depletion of conventional energy sources in the future. With the increase of fossil fuel consumption, there are two outstanding problems in front of us: one is the increasingly serious environmental pollution, and the other is the depletion of existing fossil fuels on the earth. According to consumption calculations, the world's oil resources will eventually be exhausted in the next 50 to 80 years. On the ...

Examples

Embodiment 1

[0039] HZSM-5 (SiO 2 / Al 2 o 3 =50) by NaZSM-5 and 1mol·L -1 After being exchanged four times in ammonium nitrate solution, it was obtained by roasting at 600°C in air for 6h. The Mo / HZSM-5 catalyst was prepared by an equal impregnation method. A certain amount of HZSM-5 molecular sieve was impregnated in a quantitative ammonium paramolybdate solution (pH=6), stirred at room temperature for 30min, dried at 120°C for 10h, and air Calcined at 720°C for 8 hours to obtain Mo / HZSM-5 samples with desired Mo weight percentages of 1, 2, and 5.

Embodiment 2

[0041] Mix ZSM-5 (Si / Al=29, pore average diameter 0.60nm), alumina and Pd salt solution by kneading method, extrude into rods, dry and roast, and grind into 20-40 mesh particles. Catalysts with Pd mass fractions of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% were obtained.

Embodiment 3

[0043] Catalysts A and B prepared in Examples 1 and 2 were used to react in an electrocatalytic hydrated proton device. Catalyst loading: 1g. After the catalyst is loaded, 10L of 50% ethanol is added, the air is evacuated with an inert gas, the temperature is raised to 100° C. to start the reaction, and voltage is applied to the electrodes. The reaction pressure is 0.4MPa. Equilibrium was reached after 2 hours of reaction, and samples were taken for analysis. Product analysis was carried out by HP 6890D gas chromatograph, and ethanol, dimethyl ether and by-products were analyzed by hydrogen flame ionization detector and Porapak-N chromatographic column. The results are shown in Table 1. The resulting product was separated by compression to obtain dimethyl ether.

[0044] The reaction performance of table 1 bifunctional catalyst

[0045] catalyst

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