Method and system for producing hydrogen of different purity grades by using semi-coke coke oven gas
A coke oven gas and hydrogen technology, applied in the field of coal chemical industry, can solve problems such as difficulty in recovering blue carbon coke oven gas, and achieve the effects of reducing emissions and easy disposal of recovered resources.
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Embodiment 1
[0044] A method for producing hydrogen of different purity grades by using semi-coke coke oven gas, comprising the following steps:
[0045] 1) Pressurize the semi-coke coke oven gas and cool it to separate the heavy component impurities in the coke oven gas, such as tar, naphthalene, aromatic compounds, etc., to obtain clean gas;
[0046] 2) The clean gas is pressurized twice and mixed with superheated steam. Under the action of catalyst A at a temperature of 600°C and a pressure of 2 MPa, the methane in the clean gas reacts with superheated steam to obtain A mixed gas A comprising hydrogen and carbon monoxide, wherein the ratio of the moles of superheated steam to the moles of carbon atoms is 2.5, and the catalyst A is mainly composed of Ni and Al 2 o 3 Prepared for carrier. The chemical equation for the reaction is:
[0047]
[0048] 3) After the mixed gas A is cooled, it reacts under the action of Fe-Cr catalyst, so that the carbon monoxide in the mixed gas A reacts ...
Embodiment 2
[0054] A method for producing hydrogen of different purity grades by using semi-coke coke oven gas, comprising the following steps:
[0055] 1) Pressurize the semi-coke coke oven gas and cool it to separate the heavy component impurities in the coke oven gas, such as tar, naphthalene, aromatic compounds, etc., to obtain clean gas;
[0056] 2) The clean gas is pressurized twice and mixed with superheated steam. Under the action of catalyst A at a temperature of 900°C and a pressure of 1 MPa, the methane in the clean gas reacts with superheated steam to obtain Mixed gas A containing hydrogen and carbon monoxide, wherein the ratio of moles of superheated steam to moles of carbon atoms is 4.5, wherein the catalyst A is prepared with noble metal Au as an active component and MgO as a carrier. The chemical equation for the reaction is:
[0057]
[0058] 3) After the mixed gas A is cooled down, it reacts under the action of the Co-Mo catalyst, so that the carbon monoxide in the m...
Embodiment 3
[0064] A method for producing hydrogen of different purity grades by using semi-coke coke oven gas, comprising the following steps:
[0065] 1) Pressurize the semi-coke coke oven gas and cool it to separate the heavy component impurities in the coke oven gas, such as tar, naphthalene, aromatic compounds, etc., to obtain clean gas;
[0066] 2) After secondary pressurization, the clean gas is mixed with superheated steam. Under the action of catalyst A at a temperature of 700°C and a pressure of 1.5MPa, the methane in the clean gas reacts with superheated steam. Obtain the mixed gas A that comprises hydrogen and carbon monoxide, wherein, the ratio of superheated steam mole number and carbon atom mole number is 3, and wherein, described catalyst A is to take precious metal Pt as active component, with SiO 2 , ZrO 2 and TiO 2 Prepared for carrier. The chemical equation for the reaction is:
[0067]
[0068] 3) After the mixed gas A is cooled, it reacts under the action of P...
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