Chromium-free normal-temperature efficient purifying adsorbent for removing H2S or SO2 and preparing method thereof
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A technology of SO2 and sorbent, which is applied in the field of chromium-free and high-efficiency H2S, SO2 purification sorbent and its preparation at room temperature, can solve problems such as complicated equipment, and achieve the effects of fast reaction speed and high desulfurization conversion rate
Inactive Publication Date: 2007-10-10
NO 63971 TROOPS PLA
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Problems solved by technology
[0002] Existing technology to remove H alone 2 S, SO 2 Mainly, such as active manganese oxide method to remove SO 2 (Chen Zhaoxiong, Environmental Science 1996, 16, 3), it has complex equipment; iodine-containing activated carbon method for SO removal 2 (Liu Dazhuang, Carbon1993, 31, 1), it generates sulfuric acid; the trickle bed reactor method removes SO 2 (Yuan Weikang, Journal of East China University of Science and Technology, 1998, 24, 3), still under development; Chinese patent CN 1137556 1996, improved gas desulfurization method for H removal 2 S, it can only be used as crude desulfurization; remove SO 2 and NOx patents are US 5,366,710, 1994, which uses manganese and iron compounds, and the reaction temperature is 200°C
Patent CN1253847A, 2000, for desulfurization at room temperature, involving H 2 S, COS and CS 2 , but excluding SO 2 , the loading component contains the carcinogen chromium, and the preparation process needs to be treated at high temperature under the protection of nitrogen
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Embodiment 1
[0012] Coal-based granular activated carbon 100 parts, specific surface area 1100m 2 / g, sieve to remove powder, and dry at 150°C for 3-5 hours. Cu(NO 3 ) 2 2 parts, 4 parts of KOH dissolved in 80 parts of water, mixed with the above-mentioned activated carbon, fully stirred to make it impregnated evenly, after standing for 8 hours, put it in an oven and dry at 130°C for 6 hours. Sorbent A was prepared.
[0013] After the sorbent A prepared in Example 1 was used for a long time, a small amount of pulverization appeared on the surface of the activated carbon.
Embodiment 2
[0015] Prepare sorbent A according to Example 1. Dissolve 2 parts of polyacrylate in 60 parts of water, mix thoroughly with A and let stand for 4 hours, then dry in an oven at 160°C for 4 hours. Sorbent B is prepared. Sorbent B has a smooth surface and no pulverization.
Embodiment 3
[0017] The sorbent A prepared by embodiment 1 is filled in the clarifier, at a space velocity of 48000h -1 , inlet gas concentration SO 2 =2.69ppb,H 2 When S=1.73ppb, the test shows that after purification, H 2 S and SO 2 , SO x All are less than 1ppb, see Table 1.
[0018] before use
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Abstract
The invention is desulfurizing sorbent which is made up by immersing at least two kinds of transition metal and alkali metals compound and polyacrylic ester on coal active char (the weight are 3-30%, 1-40%, 0.2-10% of char weight respectively). The manufacturing method is: the water-soluble transition metal, kalium compound and polyacrylic ester are marinated on the char carrier respectively or jointly, and they are dried and actived in air at 80-160 deg.C. The reaction speed of the sorbent is fast, it can purifies H2S, SO2 to ppb grade, the rate can reach 50000 h-1. It has no chromium, no dust on the surface and it is smooth. It can be used in semiconductor industry, special life supporting system closed room, and medical and health, cultural relic protection and environment protection fields.
Description
Technical field [0001] The invention relates to a chromium-free normal temperature high-efficiency H 2 S, SO 2 Purification sorbent and its preparation method. Background technique [0002] Existing technology to remove H alone 2 S, SO 2 Mainly, such as active manganese oxide method to remove SO 2 (Chen Zhaoxiong, Environmental Science 1996, 16, 3), it has complex equipment; iodine-containing activated carbon method for SO removal 2 (Liu Dazhuang, Carbon1993, 31, 1), it generates sulfuric acid; the trickle bed reactor method removes SO 2 (Yuan Weikang, Journal of East China University of Science and Technology, 1998, 24, 3), still under development; Chinese patent CN 1137556 1996, improved gas desulfurization method for H removal 2 S, it can only be used as crude desulfurization; remove SO 2 And the patent of NOx has US 5,366,710,1994, and it uses manganese and iron compound, and the reaction temperature is 200 ℃. Patent CN1253847A, 2000, for desulfurization at room ...
Claims
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