Removal Of Hydrogen Sulfide From Process Streams
First Claim
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1. A process for removing H2S from a gas stream containing H2S, the process comprising(i) assessing the O2/H2S molar ratio in the H2S containing gas stream to determine if the O2/H2S molar ratio is less than about 1.5;
- (ii) mixing air or oxygen into the H2S containing gas stream at a rate to achieve an O2/H2S molar ratio equal to or greater than about 1.5, if the measured O2/H2S molar ratio is less than about 1.5;
(iii) assessing the relative humidity of the H2S containing gas stream to determine if the relative humidity is equal to or greater than about 50%;
(iv) reducing the relative humidity of the H2S gas stream to less than about 50%, if the measured relative humidity is greater than 50%; and
subsequently(v) contacting the H2S containing gas stream with a porous amorphous solid mixed metal oxy-hydroxide H2S removal media comprising copper and iron.
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Abstract
Disclosed are processes for gas streams containing H2S, the processes comprise contacting the gas streams with a mixed metal oxy-hydroxide media comprising two or more metals selected from the group consisting of iron, copper and silicon.
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Citations
26 Claims
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1. A process for removing H2S from a gas stream containing H2S, the process comprising
(i) assessing the O2/H2S molar ratio in the H2S containing gas stream to determine if the O2/H2S molar ratio is less than about 1.5; -
(ii) mixing air or oxygen into the H2S containing gas stream at a rate to achieve an O2/H2S molar ratio equal to or greater than about 1.5, if the measured O2/H2S molar ratio is less than about 1.5; (iii) assessing the relative humidity of the H2S containing gas stream to determine if the relative humidity is equal to or greater than about 50%; (iv) reducing the relative humidity of the H2S gas stream to less than about 50%, if the measured relative humidity is greater than 50%; and
subsequently(v) contacting the H2S containing gas stream with a porous amorphous solid mixed metal oxy-hydroxide H2S removal media comprising copper and iron. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 15)
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9. A process for removing H2S from a gas stream containing H2S, the process comprising
(i) assessing the O2/H2S molar ratio in the H2S containing gas stream to determine if the O2/H2S molar ratio is less than about 1.5; -
(ii) mixing air or oxygen into the H2S containing gas stream at a rate to achieve an O2/H2S molar ratio equal to or greater than about 1.5 in the H2S containing gas stream, if the measured O2/H2S molar ratio is less than about 1.5; (iii) assessing the relative humidity of the H2S containing gas stream to determine if the relative humidity is greater than about 50% in the H2S containing gas stream; (iv) removing water from the H2S containing gas stream if the measured relative humidity is equal to or greater than about 50% in the H2S containing gas stream; and
subsequently(v) contacting the H2S containing gas stream with a porous amorphous solid mixed metal oxy-hydroxide H2S removal media comprising copper, iron, and silicon. - View Dependent Claims (10, 11, 12, 13, 14, 16)
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17. A process for removing H2S from a gas stream containing H2S, the process comprising
(i) assessing the O2/H2S molar ratio in the H2S containing gas stream to determine if the O2/H2S molar ratio is less than about 1.5; -
(ii) mixing air or oxygen into the H2S containing gas stream at a rate to achieve an O2/H2S molar ratio equal to or greater than about 1.5 in the H2S containing gas stream, if the measured O2/H2S molar ratio is less than about 1.5; (iii) reducing the relative humidity of the H2S gas stream to about 15%, if the measured relative humidity of the H2S gas stream is greater than 15%; and
subsequently(iv) contacting the H2S containing gas stream with a porous amorphous solid mixed metal oxy-hydroxide H2S removal media comprising copper, iron and silicon, wherein the mixed metal oxy-hydroxide H2S removal media has a pore volume equal to or greater than 0.40 cm3/g. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A process for removing H2S from a gas stream containing H2S, the process comprising
(i) assessing O2/H2S molar ratio in the H2S containing gas stream to determine if the O2/H2S molar ratio is less than about 1.5 in the H2S containing gas stream; -
(ii) mixing air or oxygen into the H2S containing gas stream if the O2/H2S molar ratio is less than about 1.5 to achieve an O2/H2S molar ratio equal to or greater than about 1.5 in the H2S containing gas stream; (iii) assessing the relative humidity of the H2S containing gas stream; (iv) adjusting the relative humidity of the H2S containing gas stream to a target relative humidity for the H2S containing gas stream; (v) contacting the H2S containing gas stream with a porous amorphous solid mixed metal oxy-hydroxide H2S removal media having a pore volume equal to or greater than 0.40 cm3/g, a H2S removal capacity equal to or greater than about 500 mg/g and comprising about 60% copper, about 30% iron and about 10% silicon. - View Dependent Claims (24, 25, 26)
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Specification