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高温烟气热解废轮胎过程中痕量金属Cu、Pb的迁移特性分析

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化工进展 2024年第3期43卷 1606-1613页

作者：张鑫汤吉昀陈娟宋占龙董勇姚洪山东大学能源与动力工程学院山东济南250061 昌吉学院能源与控制工程学院新疆昌吉831100 华中科技大学能源与动力工程学院煤燃烧与低碳利用全国重点实验室湖北武汉430000

废轮胎(WT)作为一种常见固废,不合理的处置会对环境造成较大污染。本文采用燃煤高温烟气对WT进行热解,重点研究了热解过程中重金属Cu和Pb的释放特性,以及不同金属氧化物(CaO、MgO、Al_(2)O_(3)、Fe_(2)O_(3))对两种重金属的控制效果,此... 详细信息

废轮胎(WT)作为一种常见固废,不合理的处置会对环境造成较大污染。本文采用燃煤高温烟气对WT进行热解,重点研究了热解过程中重金属Cu和Pb的释放特性,以及不同金属氧化物(CaO、MgO、Al_(2)O_(3)、Fe_(2)O_(3))对两种重金属的控制效果,此外还研究了添加聚氯乙烯(PVC)对两种重金属迁移释放的影响。结果表明,当热解时间为10min时,两种元素已经基本释放完全。高温促进了Cu的富集,而低温反而促进了Cu的释放。对Pb元素而言,随着温度的升高,其释放量不断增加,展现出明显的线性规律。当WT添加金属氧化物热解时,MgO促进了Cu的富集,而Al_(2)O_(3)促进了Pb的富集。当WT添加PVC热解时,低温促进了Cu的富集,而高温促进了Cu的释放。但不论温度的高低,PVC的添加使得Pb几乎完全释放。此时,添加Fe_(2)O_(3)对两种重金属的释放均起到了抑制作用。

关键词：废轮胎热解高温烟气铜铅

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微纳米气泡强化臭氧氧化降解含酚废水

化工进展 2024年第8期43卷 4614-4623页

作者：宋占龙汤涛潘蔚赵希强孙静毛岩鹏王文龙山东大学燃煤污染物减排国家工程实验室环境热工技术教育部工程研究中心山东省能源碳减排技术与资源化利用重点实验室山东济南250061

为了降解毒性强的含酚工业废水,本文将微纳米气泡与臭氧氧化法相结合,探究了处理温度、溶液pH、苯酚初始浓度和臭氧浓度对苯酚降解的影响。结果表明,相较于传统气泡,微纳米气泡破裂可诱导产生更多的·OH,弥补了臭氧传质效率低和氧化性... 详细信息

为了降解毒性强的含酚工业废水,本文将微纳米气泡与臭氧氧化法相结合,探究了处理温度、溶液pH、苯酚初始浓度和臭氧浓度对苯酚降解的影响。结果表明,相较于传统气泡,微纳米气泡破裂可诱导产生更多的·OH,弥补了臭氧传质效率低和氧化性不足等缺点,使反应体系的氧化还原电位明显提高,并在苯酚降解过程中起到主要作用;相比于臭氧氧化法,苯酚降解效果得到显著提升;提升臭氧浓度、溶液pH及降低苯酚初始浓度均可促进反应体系中生成更多的·OH,进而提升除酚率。通过气相色谱-质谱法(GC-MS)检测苯酚降解的中间产物,分析了苯酚降解的可能路径。总体而言,微纳米气泡结合臭氧氧化法是一种有潜力的除酚技术,研究结果对此技术在工业废水降解中的应用和推广具有指导意义。

关键词：废水微纳气泡臭氧氧化苯酚降解

Study on sulfur migration in activated carbon adsorption-desorption cycle: Effect of alkali/alkaline earth metals

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Journal of Environmental Sciences 2021年第1期33卷 119-129页

作者： Jun Li Liqiang Zhang Tao Wang Jingcai Chang zhanlong song Chunyuan Ma National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Eruironmental Thermal Technology of Ministry of EducationShandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinan 250061China School of Environmental Science and Engineering Shandong UniversityQingdao 266237China

Activated carbon(AC)has been widely used in the removal of SO_(2) from flue gas owing to its well-developed pore structure and abundant functional ***,the effect of alkali/alkaline earth metals on sulfur migration was investigated based on the dynamic adsorption and temperature programmed desorption *** adsorption and desorption properties of six types of AC(three commercial and three laboratory-made)were carried out on a fixed-bed experimental device,and the physical and chemical properties of samples were determined by X-ray fluorescence,X-ray diffraction,scanning electron microscopy/energy dispersive X-ray,and X-ray photoelectron spectroscopy *** experimental results showed that the adsorbed SO_(2) cannot be completely desorbed by increasing the regeneration temperature(350-850℃),while the SO_(2) fixed in the AC combines with the Ca-based minerals in the ash to form a stable *** different samples,higher ash content,higher CaO content in the ash and a more developed pore structure lead to a higher SO_(2) fixation ***,the multiple adsorption-desorption cycles experiment showed that the effect of SO_(2) fixation is mainly reflected in the first cycle,after which the adsorption and desorption amount are approximately the *** study elucidates the effect of alkali/alkaline earth metals on the adsorption-desorption cycle of AC,which provides a deeper understanding of sulfur migration in the AC flue gas desulfurization process.

关键词： Activated carbon Alkali/alkaline earth metals Sulfur migration Adsorption-desorption cycle So2 fixation

Current status of applying microwave-associated catalysis for the degradation of organics in aqueous phase – A review

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Journal of Environmental Sciences 2019年第7期31卷 119-135页

作者： Chao Xue Yanpeng Mao Wenlong Wang zhanlong song Xiqiang Zhao Jing Sun Yanxiang Wang School of Energy and Power Engineering Shandong University School of Material Science & Engineering Shandong University

Interactions between microwaves and certain catalysts can lead to efficient, energy-directed convergence of a relatively dispersed microwave field onto the reactive sites of the catalyst,which produces thermal or discharge effects around the catalyst. These interactions form"high-energy sites"(HeS) that promote energy efficient utilization and enhanced in situ degradation of organic pollutants. This article focuses on the processes occurring between microwaves and absorbing catalysts, and presents a critical review of microwave-absorbing mechanisms. This article also discusses aqueous phase applications of relevant catalysts(ironbased, carbon-based, soft magnetic, rare earth, and other types) and microwaves, special effects caused by the dimensions and structures of catalytic materials, and the optimization and design of relevant reactors for microwave-assisted catalysis of wastewater. The results of this study demonstrate that microwave-assisted catalysis can effectively enhance the degradation rate of organic compounds in an aqueous phase and has potential applications to a variety of engineering fields such as microwave-assisted pyrolysis, pollutant removal,material synthesis, and water treatment.

关键词： Microwaves Catalysts High energy sites Organics degradation Aqueous phase

VOC degradation by microwave-induced metal discharge and thermal destruction:a comparative study

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Waste Disposal and Sustainable Energy 2019年第4期1卷 261-270页

作者： Yuting Lv Yuli Zhou Wenlong Wang Jing Sun zhanlong song Ke Wang National Engineering Laboratory for Coal-fired Pollutants Emission Reduction Shandong UniversityJinan 250100China Department of Engineering Physics Tsinghua UniversityBeijing 100084China

The effective treatment of volatile organic compounds(VOCs)is essential because of their direct effects on air pollution and human *** paper introduces microwave-induced metal discharge as a highly effective and byproduct value-added approach to degrade high-concentration toluene as a model *** effect of the factors that influence the discharge intensity,including the metal type(Fe,Cu,Ni,Zn)and amount,was *** efficiency of toluene can reach 79.76% under optimal discharge *** addition,the discharge method was compared with traditional thermal destruction at 700℃,900℃ and 1100℃.The gaseous and liquid cracking products of toluene produced by the microwave-induced metal discharge method were almost similar to those obtained under thermal destruction at 900℃;however,the solid-phase discharge products were nanoparticles that demonstrated good graphitization,while the thermal destruction products were amorphous *** work offers an effective and flexible way to degrade high-concentration VOCs and also provides an application reference for biomass tar cracking and removal of other organic pollutants.

关键词： Volatile organic compounds Toluene Three-phase products Degradation

Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment

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Frontiers in Energy 2022年第6期16卷 931-942页

作者： Jing SUN Guanqun YU Kui AN Wenlong WANG Biao WANG Zhenyu JIANG Chenggong SUN YanpengMAO Xiqiang ZHAO zhanlong song National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology(Ministry of Education)Shandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinan 250061China Faculty of Engineering University of NottinghamNottingham NG72RDUK

Diverse interactions between microwaves and irradiated media provide a solid foundation for identifying novel organization pathways for energy *** this study,a high-energy-site phenomenon and targeted-energy transition mechanism were identified in a particular microwave heating(MH)*** discharges were observed when microwaves were imposed on irregularly sized SiC particles,producing tremendous heat that was 8-fold the amount generated in the discharge-free *** efficiency was thereby greatly improved in the electricity-microwaves-effective heat ***,the dispersed microwave field energy concentrated in small sites,where local temperatures could reach 2000℃–4000℃,with the energy density reaching up to 4.010^(5) W/*** can be called a high-energy site phenomenon which could induce further processes or reactions enhancement by coupling effects of heat,light,and *** whole process,including microwave energy concentration and intense site-energy release,shapes a targeted-energy transition mechanism that can be optimized in a controlled manner through morphology *** particular,the discharge intensity,frequency,and high-energy sites were strengthened through the fabrication of sharp nano/microstructures,conferring twice the energy efficiency of untreated metal *** microwave-induced high-energy sites and targeted energy transition provide an important pathway for high-efficiency energy deployment and may lead to promising applications.

关键词： microwave discharge high-energy sites targeted-energy transition morphology design energy efficiency

Systematic investigation of SO_(2) adsorption and desorption by porous powdered activated coke:Interaction between adsorption temperature and desorption energy consumption

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Chinese Journal of Chemical Engineering 2022年第8期35卷 140-148页

作者： Jun Li Liqiang Zhang Xiao Zhu Mengze Zhang Tai Feng Xiqiang Zhao Tao Wang zhanlong song Chunyuan Ma National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of Ministry of EducationShandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinan 250061China College of Mechanical and Electronic Engineering Shandong University of Science and TechnologyQingdao 266590China

Porous carbon materials have been widely used for the removal of SO_(2) from flue *** main objective of this work is to clarify the effects of adsorption temperature on SO_(2) adsorption and desorption energy ***-based porous powdered activated coke(PPAC)prepared in the drop-tube reactor was used in this *** N_(2) adsorption measurements and Fourier transform infrared spectrometer analysis show that PPAC exhibits a developed pore structure and rich functional *** experimental results show that with a decrease in adsorption temperature in the range of 50–150℃,the adsorption capacity of SO_(2) increases linearly;meanwhile,the adsorption capacity of H_(2)O increases,resulting in the increase in desorption energy consumption per unit mass of *** processes of SO_(2) and H_(2)O desorption were determined by the temperature-programmed desorption test,and the desorption energies for each species were *** the energy consumption per unit of desorption and the total amount of adsorbent,the optimal adsorption temperature yielding the minimum total energy consumption of regeneration is *** study systematically demonstrates the effect of adsorption temperature on the adsorption–desorption process,providing a basis for energy saving and emission reduction in desulfurization system design.

关键词： Activated coke SO2 adsorption Desorption energy consumption Optimal adsorption temperature

Numerical study on the role of microwave-metal discharge in microwave pyrolysis of WPCBs

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Waste Disposal and Sustainable Energy 2021年第3期3卷 185-200页

作者： Zhenyu Jiang Jing Sun Wenlong Wang Huacheng Zhu Jingwei Li zhanlong song Xiqiang Zhao Yanpeng Mao Shouyan Chen National Engineering Laboratory for Reducing Emissions from Coal Combustion Engineering Research Center of Environmental Thermal Technology of Ministry of EducationShandong Key Laboratory of Energy Carbon Reduction and Resource UtilizationSchool of Energy and Power EngineeringShandong UniversityJinanChina Key Laboratory of the Wireless Power Transfer College of Electronic and Information EngineeringSichuan UniversityChengduChina

As a promising green technology,microwave heating is highlighted by its high efficiency and low consumption,especially in the fast pyrolysis treatment for e-waste *** discharge induced by microwave-metal interaction plays a significant role in the process,and its contribution to heat generation is,however,always hard to define qualitatively through direct *** this simulation,a microwave heating model featuring the pulsed microwave-metal(MW-m)discharge was designed in multi-dimensions,using COMSOL Multiphysics software,to emphatically probe the depth and extent of the hot-spot effect as well as its auxo-action on the pyrolysis process of waste printed circuit boards(WPCBs).The energy loss generated by MW-m discharge was added into the models in the form of a built-in fluctuating heat source,and it is found that at a relatively low microwave energy-to-heat conversion rate(31.5%,220.5 W),due to the unique thermal effect of microwave-metal discharge,it can achieve an ideal pyrolysis *** on the results,the instantaneous heat by discharge is generated in the similar trend of radiation pulses,and the local temperature of discharge spots can reach more than 2000 K the instant the discharge occurs,shortening the overall pyrolysis from dozens of minutes to around 200 s.

关键词： Microwave heating Electric discharge Hot-spot effect E-waste Pyrolysis

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含油污泥辐射热解传热模拟及能量分析

环境工程 2024年第2期42卷 73-81页

作者：宋占龙陶双华徐宝林赵希强孙静毛岩鹏王文龙于军山东大学燃煤污染物减排国家工程实验室环境热工技术教育部工程研究中心山东省能源碳减排技术与资源化利用重点实验室济南250061 山东省环境保护科学研究设计院有限公司济南250013

油泥辐射热解过程复杂,热解炉内温度场和传热特性不明等,通过Fluent软件,选用双欧拉模型、DO辐射模型及多组分模型研究了热解炉内的温度分布及不同因素下物料的升温特性。结果表明,炉内油泥的温度分布以L/D=10为分界点将其分为了升温和... 详细信息

油泥辐射热解过程复杂,热解炉内温度场和传热特性不明等,通过Fluent软件,选用双欧拉模型、DO辐射模型及多组分模型研究了热解炉内的温度分布及不同因素下物料的升温特性。结果表明,炉内油泥的温度分布以L/D=10为分界点将其分为了升温和恒温2个阶段,且600℃为最佳热解终温。同时,较高的含水率会延长油泥热解时间,而降低螺旋转速可减少最终油泥的剩余量。另外,在辐射管上方加装遮热板可改善炉膛温度分布的均匀性。最后,对整个热解系统进行能量平衡分析发现,热解产物总回收能量为6592.25 kJ,能量回收率最高可达82%,其中热解气能量占该系统总输入能量的65.78%~90.11%,可极大减少系统所需的外部能量补给。

关键词：含油污泥辐射热解数值模拟温度分布能量回收