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removal of sulfur in coke oven gas by mixing ZnO-based additive into coal

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中国有色金属学会会刊：英文版 2001年第6期11卷 931-936页

作者：郭占成唐惠庆叶树锋中科院过程工程所北京 100080

A new technology for recycling EAF dust and removal of sulfur from coking oven gas was investigated. The new technology does not need to set up special equipment to treat COG (coke oven gas), and it is only acquired by mixing the ZnO base additive into the coke coal. In the stage of pyrolysis of the coal volatile, ZnO of the additive combines with H 2S, CS 2, COS and C 2H 2SH of coal gas, forming ZnS in coal char. In the stage of coking of the coal char, Zn is gasified with S, then the gas Zn react with H 2S, CS 2, COS and C 2H 2SH, forming ZnS in coal gas and depositing as dust. After the collected ZnS dust was regenerated, it can be recycling as the additive again. The sulfur in coal gas can be completely removed if the mole ratio of the added Zn to the volatilized S is more than 1, and the sulfur in coke is also slightly decreased comparing with the coke without the additive. The EAF dust containing ZnO and Fe 2O 3 can be the base material of the desulfurizing additive.

关键词： sulfur removal coal gas coking sulfur sorbent EAF dust

Production of high-purity hydrogen from paper recycling black liquor via sorption enhanced steam reforming

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Green Energy & Environment 2021年第5期6卷 771-779页

作者： Hanke Li Shijie Wu Chengxiong Dang Guangxing Yang Yonghai Cao Hongjuan Wang Feng Peng Hao Yu State Key Laboratory of Pulp and Paper Engineering School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou510640China School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou510006China

Environmentally friendly and energy saving treatment of black liquor(BL),a massively produced waste in Kraft papermaking process,still remains a big ***,by adopting a NieCaOeCa_(12)Al_(14)O_(33) bifunctional catalyst derived from hydrotalcite-like materials,we demonstrate the feasibility of producing high-purity H_(2)(~96%)with 0.9 mol H_(2) mol^(-1) C yield via the sorption enhanced steam reforming(SESR)of *** SESRBL performance in terms of H_(2) production maintained stable for 5 cycles,but declined from the 6th ***,Raman spectroscopy,elemental analysis and energy dispersive techniques were employed to rationalize the deactivation of the *** was revealed that gradual sintering and agglomeration of Ni and CaO and associated coking played important roles in catalyst deactivation and performance degradation of SESRBL,while deposition of Na and K from the BL might also be responsible for the declined *** the other hand,it was demonstrated that the SESRBL process could effectively reduce the emission of sulfur species by storing it as CaSO_(3).Our results highlight a promising alternative for BL treatment and H_(2) production,thereby being beneficial for pollution control and environment governance in the context of mitigation of climate change.

关键词： Black liquor High-purity hydrogen Sorption enhanced steam reforming sulfur removal

Optimization of a continuous ultrasound assisted oxidative desulfurization(UAOD) process of diesel using response surface methodology(RSM) considering operating cost

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Chinese Journal of Chemical Engineering 2020年第5期28卷 1384-1396页

作者： Mohammad Dana Mohammad Amin Sobati Shahrokh Shahhosseini Aminreza Ansari School of Chemical Engineering Iran University of Science and Technology(IUST)TehranIran

A continuous-flow ultrasound-assisted oxidative desulfurization(UAOD)of partially hydro-treated diesel has been investigated using hydrogen peroxide-formic acid as simple and easy to apply oxidation *** effects of different operating parameters of oxidation stage including residence time(2–24 min),formic acid to sulfur molar ratio(10–150),and oxidant to sulfur molar ratio(5–35)on the sulfur removal have been studied using response surface methodology(RSM)based on Box–Behnken *** the operating costs of the continuous-flow oxidation stage including chemical and electrical energy consumption,the appropriate values of operating parameters were selected as follows:residence time of 16 min,the formic acid to sulfur molar ratio of 54.47,and the oxidant to sulfur molar ratio of *** these conditions,the sulfur removal and the volume ratio of the hydrocarbon phase to the aqueous phase were 86.90%and 4.34,*** drastic reduction in the chemical consumption in the oxidation stage,the volume ratio of the hydrocarbon phase to the aqueous phase was increased up to ***,the formic acid to sulfur molar ratio and the oxidant to sulfur molar ratio were obtained 23.64 and 3.58,respectively,which lead to sulfur removal of 84.38%with considerable improvements on the operating cost of oxidation stage in comparison with the previous works.

关键词： Ultrasound-Assisted Oxidative Desulfurization(UAOD) Continuous-flow system sulfur removal Response Surface Methodology(RSM) Operating cost

Wet Desulfurization of High-sulfur Petroleum Coke Improved via Pre-calcination,H_(2)O_(2) Treatment,and Ultrasound

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 34-45页

作者： Wang Gang Mao Qiuyun Liu Wei Yu Zhou Zhong Qifan School of Metallurgy and Environment Central South UniversityChangsha 410083China Department of Educational Science Hunan First Normal UniversityChangsha 410205China

This work reports an improved method for the wet desulfurization of high-sulfur petroleum coke(petcoke)powder based on the combination of pre-calcination,H_(2)O_(2),and *** results demonstrated that over 45%of the sulfur atoms were efficiently removed from Tianjin coke and Qilu coke(particle sizesulfurization with HNO3(8 mol/L)and H_(2)O_(2)(2 mol/L)solution at a reaction temperature of 60℃,a reaction time of 6 h,a liquid-to-solid ratio of 10 mL/g,and a 40 kHz ultrasonic power of 400 *** addition,the specific surface area of the petcoke particles increased from 0.7 to 301.49 m^(2)/*** desulfurization,the pore size distribution of the petcoke particles was more concentrated on micropores compared with the samples prior to petcoke *** force field molecular dynamics simulation results indicated that HNO_(3) continuously oxidized the carbon atoms adjacent to sulfur atoms in the petcoke macromolecules and promoted sulfur removal from petcoke via the cleavage of C-S *** sulfur transformation mechanism can be summarized as follows:thiophene sulfur→branched chain carbon sulfur→CO_(2)S→C_(2)O_(2)S→C_(2)O_(3)NS→C_(2)O_(4)S→CO_(2)S.

关键词： sulfur removal ultrasonic petcoke thiophene ReaxFF

Study on Reduction of sulfur Content in FCC Gasoline

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China Petroleum Processing & Petrochemical Technology 2003年第2期5卷 51-56页

作者： Hou Dianguo(Research Institute of Petroleum Processing, Beijing 100083) Res. Inst. of Petroleum Processing Beijing 100083 China

Reduction of sulfur content in FCC gasoline was studied in a fixed fluid bed (FFB) unit by using metal-modified LV-23 FCC catalyst. The results showed that the sulfur content in FCC gasoline could be reduced with LV-23 catalyst modified with zinc, palladium, zinc-palladium, zinc-cobalt, and zinc-nickel. Among these metals or metal combinations, palladium-containing catalyst was the most effective. Desulfurization of the heavy fraction of FCC gasoline was more effective than full-range gasoline under the same conditions with palladium-containing catalysts. A high reaction temperature was favorable to desulfurization, but it would reduce the yield of liquid product. After desulfurization reaction, the olefin content of product gasoline decreased while the aromatic and iso-alkane contents increased. removal of thiophene and benzothiophene is higher.

关键词： FCC gasoline catalyst metal modification sulfur removal

Separation of sulfur/Gasoline Mixture with Polydimethylsiloxane/ Polyetherimide Composite Membranes by Pervaporatlon

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Chinese Journal of Chemical Engineering 2009年第4期17卷 707-710页

作者：赵长伟李继定陈剑亓荣彬栾兆坤 State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing 100085 China Department of Chemical Engineering Tsinghua University Beijing 100084 China

Worldwide environment has resulted in a limit on the sulfur content of *** is urgent to investigate the desulfurization of *** polydimethylsiloxane(PDMS)/polyetherimide(PEI)composite membranes were prepared by casting a PDMS solution onto porous PEI substrates and characterized by scanning electron microscope(SEM).The membranes were used for sulfur removal from gasoline by *** effects of feed temperature,sulfur content in the feed and PDMS layer thickness on membrane performance were investigated,and an activation energy of permeation was *** results indicated that higher feed temperature yielded higher total flux and lower sulfur enrichment *** total flux varied little with the increase of sulfur content in the feed,but the sulfur enrichment factor first increased with the amount of thiophene added into the gasoline,and then the variation was *** increase of PDMS layer thickness resulted in a smaller flux but a larger sulfur enrichment *** result indicates that the PDMS/PEI composite membranes are promising for desulfurization by pervaporation.

关键词： polydimethylsiloxane (PDMS)/polyetherimide (PEI) composite membranes sulfur removal gasoline pervaporation