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CO_2 Sequestration from flue gas by direct aqueous mineral carbonation of wollastonite

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Science China(Technological Sciences) 2013年第9期56卷 2219-2227页

作者： YAN Heng ZHANG JunYing ZHAO YongChun ZHENG ChuGuang State Key Laboratory of Coal Combustion Huazhong University of Science and Technology

Emission of carbon dioxide is considered to be the main cause of the greenhouse effect. Mineral carbonation, an important part of the CCS technology, is an attractive option for long-term CO2 sequestration. In this study, wollastonite was chosen as the feedstock and the feasibility of direct aqueous mineral carbonation in the simulated flue gas was investigated via a series of experimental studies carried in a stirred reactor. X-ray diffraction （XRD）, X-ray fluorescence spectroscopy （XRF）, ion chro- matography （IC） and thermal decomposition were used to determine the carbonation conversion. The influences of various factors, including reaction temperature, reaction pressure, solution composition, heat-treatment and particle size, were dis- cussed. Concurrently, the effects of SO2 and NO presented in simulated flue gas were also investigated and a possible mecha- nism was used to explain the results. Experimental results show that reaction temperature, reaction pressure and particle size can effectively improve the carbonation reaction. Addition of 0.6 M NaHCO3 was also proved to be beneficial to the reaction and heat-treatment is not needed for wollastonite to get a higher carbonation conversion. Compared with carbonation in puri- fied CO2 gas, CO2 sequestration directly from simulated flue gas by mineral carbonation is suggested to have a certain degree of economic feasibility in the conditions of medium and low-pressure. A highest carbonation conversion of 35.9% is gained on the condition of T=150℃, P=40 bar and PS 〈30 μ in distilled water for 1 h.

关键词： CO2 sequestration mineral carbonation wollastonite flue gas

Desulfurizing absorbent for flue gas and its absorption mechanism

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Journal of Environmental Sciences 2003年第1期15卷 92-96页

作者： LIHua CHENWan－ren 等 ChemicalEngineeringCollege ZhengzhouUniversityZhengzhou450002China ShanghaiJiaotongUniversity Shanghai200240China

A new desulfurizing absorbent for flue gas, i.e., an organic physical solvent of DMSO(dimethyl sulfoxide) mixed with a relatively small amount of chemical solvent(Mn 2+ ) was studied. Compared with pure physical solvent of DMSO, the purification efficiency of the new absorbent was improved. And its absorption and reaction mechanism are discussed.

关键词： liquid absorption desulfurization flue gas

Comparison and Optimization of Mid-low Temperature Cogeneration Systems for flue gas in Iron and Steel Plants

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Journal of Iron and Steel Research International 2013年第11期20卷 33-40页

作者： ZHANG Li-hua WU Li-jun ZHANG Xiao-hong JU Gui-dong Thermal and Environmental Engineering Institute Tongji University Resources and Environment Department Shandong Water Polytechnic

Three generation systems, namely, steam Rankine cycle （SRC）, organic Rankine cycle （ORC）, and steam-organic combined Rankine cycle （S-ORC）, were simulated using the Engineering Equation Solver fEES） to efficiently utilize flue gas emissions from 200 to 450 ℃ in iron and steel plants. Based on the simulation results for thermal efficiency, exergy efficiency, and power generation, the performances of the three power generation systems were compared and analyzed. To further utilize waste heat from the turbine exhaust steam of the ORC system, cas- cade （）RC （CORC） was designed for heat sources above 300 ℃. Based on a comprehensive performance comparison, the application of the ORC using R141b is preferable for 200 to 300 ℃ flue gas. For 300 to 450 ℃ flue gas, CORC is an alternative technology to improve the efficiency and quality of waste heat utilization. For flue gas above 450 ℃, S-ORC can achieve higher efficiency and power generation than conventional SRC, with a relatively small negative pressure and high dryness of the turbine outlet steam. Hence, S-ORC can be considered as a substitute for SRC.

关键词： mid-low temperature flue gas Rankine cycle thermal energy recovery generation system

High-throughput model-building and screening of zeolitic imidazolate frameworks for CO2 capture from flue gas

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Chinese Chemical Letters 2020年第1期31卷 227-230页

作者： Lixia Yang Chao Shi Lin Li Yi Li State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China International Center of Future Science Jilin UniversityChangchun 130012China

To find potential zeolitic imidazolate frameworks(ZIFs)for CO2 capture from flue gas,we built 169,898 ZIF models from 84,949 hypothetical zeolite *** calculating their lattice energies,accessible volumes to CO2,the isosteric adsorption heat(Qst)of H2 O,Henry’s constant ratio(SKH)of CO2/N2,percent regenerability(R%),CO2 working capacity(ΔNCO2),CO2/N2 adsorption selectivity(SCO2/N2))and adsorbent performance score(APS),we identi fied 49 hydrophobic ZIF structures that might outplay already-realised ZIFs built from the same imidazolate linkers for CO2 capture from flue gas.

关键词： Zeolitic imidazolate frameworks CO2 capture Molecular simulations High-throughput computations Adsorption flue gas

Synthesis, Characterization and Evaluation of Sulfur Transfer Catalysts for FCC flue gas

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China Petroleum Processing & Petrochemical Technology 2014年第2期16卷 59-64页

作者： Jiang Ruiyu Shan Honghong Zhang Jiling Yang Chaohe Li Chunyi Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) East-China Design Branch China Petroleum Engineering Construction Corporation

In this work, Zr-M(M=Cu, Mn, Ce) type sulfur transfer agent was prepared by impregnation method. Under the condition similar to that in the regenerator of FCC units, the influence of different active metal components and their contents on sulfur transfer agent were investigated. Moreover, the crystalline structure of sulfur transfer agent was characterized by X-ray diffraction(XRD) and Fourier transforms infrared spectroscopy(FT-IR). The result showed that the Zr-Mn sulfur transfer agent could effectively reduce the SO2 content in FCC regenerator flue gas, featuring high SO2 adsorption capacity. The sulfur transfer agent was inactivated in 40—60 min during the test. In the course of reduction reaction, after several reaction cycles, the formation of SO2 ceased and only H2 S was detected as the reduction product.

关键词： fluid catalytic cracking sulfur-transfer catalyst flue gas zirconium

Study on the reaction activity of CuO/γ-Al_2O_3 for dry flue gas desulfurization

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Journal of Coal Science & Engineering(China) 2004年第2期10卷 80-84页

作者：王雁张超郑瑛郑楚光 State Key Laboratory of Coal Combustion Huazhong University of Science and TechnologyWuhan 430074China

The copper oxide bed regenerable adsorber process can efficiently remove sulfur dioxide (SO2) and sulfur trioxide (SO3) and reduce nitrogen oxides (NOX) from flue gas with no solid or liquid byproducts. This paper investigates the dry flue gas desulfu- rization activities of the CuO/γ-Al2O3 under different operation conditions finding that the dispersion degree of copper oxide can achieve a threshold value, which is 0.47 mg/m2 carriers. The conclusion confirms that the sulfur capacity of desulfurizer is asso- ciated with flue gas’ space velocity, reaction temperature, copper content and the struc- ture of sorbent pellet, etc. And with the condition of the desulfurization reaction tem- perature 673 K, the space velocity 11 200 h-1 and the S/Cu mole ratio under 1, the sulfur removal efficiency can go upwards to 95%.

关键词： flue gas desulfurization copper oxide

The FCC flue gas SOx Transfer Additive RFS Developed by RIPP

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China Petroleum Processing & Petrochemical Technology 2007年第1期9卷 31-34页

作者： Chen Beiyan Jiang Wenbin Song Haitao Shen Ningyuan Tian Huiping He Mingyuan Research Institute of Petroleum Processing SINOPEC Beijing 100083

The present paper introduces the development of FCC flue gas SOx transfer additives by RIPP with a brief discussion of SOx transfer mechanism. The second-generation SO transfer additives of the RFS series are RIPP＇s proprietary additives with significantly improved performances. The results of commercial tests indicate that the RFS additive can effectively control SO emission of the FCC regenerator while maintaining product yields and product quality when the additive is used in a proper concentra- tion range.

关键词： catalytic cracking flue gas sulfur oxide additive

Mechanisms of strengthening energy and mass transfer in microbial conversion of flue-gas-derived CO_(2) to biodiesel and biogas fuels

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碳中和(英文) 2022年第1期1卷 479-490页

作者： Jun Cheng Kefa Cen State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou 310027China

The goals of national energy security and sustainable development necessitate the role of renewable energy,of which biomass energy is an essential choice for realizing the strategic energy diversification and building a lowcarbon energy *** conversion of flue-gas-derived CO_(2) for producing biodiesel and biogas has been considered a significant technology in new energy *** carbon sequestration is a hot research direction for ***,three fundamental problems relating to energy/mass transfer and conversion remain as follows:(1)contradictory relationship between high resistance of cell membrane micropores and high flux of flue-gas-derived CO_(2) limits mass transfer rate of CO_(2) molecules across cell membrane;(2)low biocatalytic activity of intracellular enzymes with high-concentration CO_(2) results in difficulties in directional carbon/hydrogen conversion;(3)competition between multiple intracellular reaction pathways and high energy barriers of target products hinder the desirable cascade energy ***,key scientific issues of microbial energy conversion lie in the understanding on directional carbon/hydrogen conversion and desirable cascade energy *** researches have established a theoretical foundation of microbial energy conversion which strengthens energy/mass transfer in microbial *** innovative results in previous studies have been obtained as follows:(1)Reveal mass transfer mechanism of vortex flow across cell membrane micropores.(2)Propose a strategy that directionally regulates enzyme activity.(3)Establish chain reaction pathways coupled with step changes.

关键词： Microalgal conversion Energy and mass transfer flue gas CO_(2) Biodiesel Biogas fuels

flue gas Desulfurization & Denitrification Technology Using Plasma Induced by Corona Discharge—DC Power Supply

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Flue Gas Desulfurization & Denitrification Technology Using ...