The influence of the conditions for pelleting granules of a zinc oxide absorbent on its pore structure, distribution of sulfur in the granules as well as the effect of desulfurization conditions on sulfur capacity and process rate are discussed. Pelleting of the granules was carried out on a Perfekt-III industrial machine of the Fette firm.
R6 sorbents provide general desulfurization of natural gas and LPG. SulfaTrap™ R7 Sorbents. R7 materials are low-cost bulk sulfur removal sorbents, ideal for
Zinc Oxide Desulfurization Adsorbent, developed by the Northwest Research Institute of Chemical Industry, is applicable to desulfurization of residue cracking gases or syngas and purification of feed gases for organic synthesis processes. It is suitable for both higher (350--408) and lower (150--210) temperature use.
water were measured for possible application as absorbents for re-generable flue gas desulfurization systems. Results were used to estimate the steam rate and principal costs of processes using 11 of the absorbents. For sulfur dioxide absorption followed by indirect steam stripping, a 9.75 % ethylenediamine solution had the lowest steam rate.
Jan 01, 2017 The desulfurization performance of fly ash and CaCO3 compound absorbent is experimentally investigated in a bubbling desulfurization reactor. Results show that the desulfurization rate of CaCO 3 is improved by adding fly ash at Ca/S mole ratio of 1.024. The maximum desulfurization rate of the compound absorbent could reach 94%.
Jan 01, 2017 The desulfurization performance of fly ash and CaCO3 compound absorbent is experimentally investigated in a bubbling desulfurization reactor. Results show that the desulfurization rate of CaCO 3 is improved by adding fly ash at Ca/S mole ratio of 1.024. The maximum desulfurization rate of the compound absorbent could reach 94%.
However, the effect of material structure on desulfurization performance of the absorbents has rarely been systematically studied so far, which severely restricts the development and application of novel adsorbents with features of high efficiency, environmental benign and low cost.
The desulfurization and denitrification absorbent currently studied in the experiment is generally used at a lower temperature around 100 °C, and usually plays a role in humidified flue gas environments and is not suitable for cement processes.
Jan 01, 2005 On the other hand, absorbent E18 (82.8 m 2 /g) and absorbent E1 (115.9 m 2 /g) with a higher surface area exhibited a higher desulfurization activity. The absorbents removed 100% of the SO 2 in the feed gas during the first 16 min (E18) and 28 min (E1), respectively. This result indicated that absorbent surface area is one of the key factors in
Various types of absorbents and desulfurization technologies have been developed and adopted by the industries to reduce the emission rate of SO 2 gas.
wet (lime or ammonia absorption) Because the absorbents lime and ammonia are readily available and the product of the wet process is easily used or disposed of, this process is now employed by over 90% of all desulfurization plants worldwide.
Desulfurization behavior of Ca-based absorbents . 2001-10-11 The capture of H 2 S or SO 2 with Ca-based absorbents, limestone and dolomite, was investigated under a periodically changing condition between reducing and oxidizing atmospheres, taking account of the coexistence of these atmospheres in a fluidized-bed coal gasifier.
The vapor pressure of sulfur dioxide above aqueous solutions of citric acid, glycolic acid, 1-methyl-2-pyrrolidone, and ethylenediamine, as well as above pure tri-n-butyl phosphate, 1-methyl-2-pyrrolidone, and water were measured for possible application as absorbents for
The hydrogen sulfide absorption capacity of zinc oxide doped with first-row transtion-metal oxides (ca. 5% metal oxide loading) has been determined using a pulse reactor.The doped oxides were prepared either by impregnation of ZnO with the transition-metal nitrates or by comprecipitation of the transition-metal and zinc nitrates with ammonium/sodium carbonate.
Hunan Huanda Environmental Protection Co.,Ltd. is the leading manufacturer of desulfurizers (or desulfurization catalysts/agents/absorbents) and gas purification catalysts in China.
Mar 16, 2021 Deep eutectic solvent (DES) was applied as the solvent of iron/alcohol amine system, and the prepared iron/ethanolamine/DES system was found to be a good desulfurizer for H 2 S removal. The absorbents were characterized by Fourier transform infrared spectroscopy.
Ionic liquids (ILs) as promising absorbents for SO2 capture in flue gas desulfurization have been extensively studied. In this work, a multisite absorption strategy was used to synthesize ether-linked diamine protic ionic liquids (EDPILs) for efficient SO2 capture. The prepared EDPILs containing ether-linkage chain exhibited superior SO2 absorption relative to conventional protic ionic liquids
Dec 20, 2017 Active absorbent for flue gas desulfurization was prepared from coal fly ash, calcium oxide (CaO) and calcium sulfate (CaSO4) by hydro-thermal
US7780846B2 US11/642,438 US64243806A US7780846B2 US 7780846 B2 US7780846 B2 US 7780846B2 US 64243806 A US64243806 A US 64243806A US 7780846 B2 US7780846 B2 US 7780846B2 Authority US United States Prior art keywords sulfur adsorbent feed stream sulfur adsorbent desulfurization Prior art date 2004-09-01 Legal status (The legal status is an assumption and is not a
Abstract. Desulfurization of natural gas is achieved commercially by absorption with liquid amine solutions. Adsorption technology could potentially replace the solvent extraction process, particularly for the emerging shale gas wells with production rates that are generally lower than that from the large conventional reservoirs, if a superior adsorbent (sorbent) is developed.
However, the effect of material structure on desulfurization performance of the absorbents has rarely been systematically studied so far, which severely restricts the development and application of novel adsorbents with features of high efficiency, environmental benign and low cost.
US7780846B2 US11/642,438 US64243806A US7780846B2 US 7780846 B2 US7780846 B2 US 7780846B2 US 64243806 A US64243806 A US 64243806A US 7780846 B2 US7780846 B2 US 7780846B2 Authority US United States Prior art keywords sulfur adsorbent feed stream sulfur adsorbent desulfurization Prior art date 2004-09-01 Legal status (The legal status is an assumption and is not a
Dec 25, 2020 Dry-process absorbents include calcium-based absorbents, calcium-based fly ash absorbents, natural manganese ore, activated carbon, activated carbon impregnated catalysts and metal catalysts. In order to synthesize an absorbent with high desulfurization and denitrification activity, silicon raw materials usually need to be activated by CaO or
The absorbents for simultaneous removal of SO 2 and NO x in aqueous have widely been investigated [3–9], including NaClO 2/NaOH, FeSO 4/H 2SO 4, KMnO 4/ NaOH, Fe(II)EDTA, Na 2SO 3, FeSO 4/Na 2SO 3,H 2O 2, CO(NH 2) 2, Molybdenum blue, and so forth. Among these, NaClO 2 is one of the most effective reagents [10–17]. But for simultaneous
The vapor pressure of sulfur dioxide above aqueous solutions of citric acid, glycolic acid, 1-methyl-2-pyrrolidone, and ethylenediamine, as well as above pure tri-n-butyl phosphate, 1-methyl-2-pyrrolidone, and water were measured for possible application as absorbents for
absorbents (Jung et al., 2006) have been,studied for desulfurization. CuO/ SBA- 15 increased the breakthrough sulfur capacity with the Cu content after the third desulfurization cycle at 500°C(Karvan and Atakül, 2008). Fe-based sorbents showed a longer breakthrough time with a higher desulfurization temperature from 420°C
The solution (technology) ZnO pellets are used as sulphur absorbents for synthesis gas from biomass gasification, coking gas from steel production and biogas. Due to the high price of absorbing pellets based on primary ZnO powders, e.g., the gasification process is not always economically viable.
Desulfurization Yi-Mou Wang, Xue-Jing Yang, Peng-Bo Fu, Liang Ma*, An-Lin Liu, Meng-Ya He absorbents, sulfur content in the flue gas, and flow rates of flue gas and absorbents on the SO2 removal efficiency of the gas cyclone–liquid jet absorption separator. EXPERIMENT
Hunan Huanda Environmental Protection Co.,Ltd. is the leading manufacturer of desulfurizers (or desulfurization catalysts/agents/absorbents) and gas purification catalysts in China.
Active absorbent for flue gas desulfurization was prepared from coal fly ash, calcium oxide (CaO) and calcium sulfate (CaSO4 ) by hydro-thermal process; steam and water hydration. The absorbents were examined and compared for its micro-structural properties. The experiments were conducted based on Design of Experiments (DOE) according to 24 factorial design.
2 desulfurization absorbents were prepared by impregnation of an aqueous solution containing 0.1 M Zn(NO 3) 2 onto the MCM-41 and TiO 2, respectively. The absorbents were dried at 378 K for 16 h and calcined at 823 K for 2 h. NSTI-Nanotech 2010, nsti, ISBN 978-1-4398-3415-2 Vol. 3, 2010 639
This paper aims to study the feasibility of two solid waste which are boron mud and fly ash as desulfurization absorbents by microwave. Under the optimal operating conditions, the desulfurization removal efficiency achieves 88.2%. The microstructure of before and after the adsorbent reaction are analyzed by SEM. Base on the experiment research, the mechanisms of simultaneous desulfurization
elsewhere [20]. In order to detect the various phases present in the absorbents before and after the desulfurization reaction, the absorbents were analyzed using X-ray diffraction (XRD). The XRD analysis was carried out using a Philips PW 1820 X-ray diffractometer with Cu-Kα radiation in the diffraction angle (2θ) range of 5-90° at a
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