重金属离子对废弃活性炭的CO<sub>2</sub>气化性能影响研究

贾宝珍; 马铭宇

doi:10.13205/j.hjgc.202505019

重金属离子对废弃活性炭的CO₂气化性能影响研究

doi: 10.13205/j.hjgc.202505019

贾宝珍¹,
马铭宇²

1. 山东省菏泽生态环境监测中心, 山东菏泽, 274000;
2. 东华大学环境学院, 上海 201620

详细信息

作者简介:
、通信作者：贾宝珍（1972—），男，主要研究方向为环境工程技术与管理。hzhjjc@126.com

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出版历程
- 收稿日期: 2024-04-29
- 录用日期: 2024-08-14
- 修回日期: 2024-07-24
- 网络出版日期: 2025-09-11

Effects of absorbed heavy metal ions on CO₂ gasification performance of spent activated carbon

JIA Baozhen¹,
MA Mingyu²

1. Shandong Heze Ecological Environment Monitoring Center, Heze 274000, China;
2. College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China

摘要

摘要: 采用模拟吸附工业废水中重金属后的废弃活性炭（CAC）进行CO₂气化制备富CO合成气，研究重金属种类与吸附量、反应温度、气体流速、CO₂浓度等因素对气化效果的影响。结果表明：Fe³⁺和Co²⁺均对CO₂气化表现出较好的促进作用，其中吸附Co²⁺的活性炭气化效果最好，相较于空白活性炭CO峰值浓度提高130%以上。相反，Cu²⁺对气化反应前期具有消极影响，后期则表现出促进效果。CO₂气化活性随着重金属吸附量增大表现出先增强后减弱的趋势，最佳吸附量为10%；CO₂气化的最佳流速为100 mL/min，过高的气体流速会降低CO₂在碳表面的停留时间；反应活性和反应温度与CO₂浓度呈正相关。结合X射线衍射相分析、傅立叶变换红外吸收光谱仪、BET比表面积检测法、扫描电子显微镜和能谱分析仪等手段对活性炭进行表征，结果表明：在废弃活性炭表面吸附的重金属离子在反应中转化为金属氧化物，从而表现出催化气化性能。该研究成果可为废弃活性炭的资源化利用以及生产高值合成气提供一条新途径。
- 模拟工业废水 /
- 废弃活性炭 /
- CO₂气化 /
- 重金属 /
- 催化
Abstract: In this paper， the spent activated carbon adsorbed heavy metals from simulated industrial wastewater was utilized for CO₂ gasification to produce CO-rich syngas. The effects of heavy metals， adsorption amount， reaction temperature， CO₂ concentration， and flow rate on the gasification performance were investigated. The results demonstrated that both Fe³⁺ and Co²⁺ had a good promoting effect on CO₂ gasification， and the activated carbon with adsorbed Co²⁺ had the best gasification effect， which increased the peak CO concentration by more than 130%， compared to the blank activated carbon. On the contrary， Cu²⁺ had a negative impact on the gasification reaction in the early stage and showed a promoting effect in the later stage. The CO₂gasification activity initially increased and then decreased with the rise in heavy metal adsorption. The optimal adsorption capacity was 10%. Additionally， CO₂with a flow rate of 100 mL/min was found to be optimal， as an excessive flow would reduce the retention time of CO₂ on the carbon surface. Furthermore， reaction activity exhibited a positive correlation with both reaction temperature and CO₂ concentration. Combined with X-ray diffraction phase analysis （XRD）， Fourier transform infrared（FTIR） absorption spectrometry， BET-specific surface area detection method （BET）， and scanning electron microscope with energy dispersive analyzer （SEM-EDS）， we found that the heavy metal ions adsorbed on the surface of the spent activated carbon were converted into metal oxides during the reaction， thus exhibiting catalytic gasification performance. This study presents a novel approach to the resource utilization of spent activated carbon and the production of high-value syngas.
- simulated industrial wastewater /
- spent activated carbon /
- CO₂ gasification /
- heavy metal /
- catalyze

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参考文献(31)

[1]	AGENCY I E. Global energy review:CO₂ emissions in 2021[R]. International Energy Agency，2022.
[2]	PARADA S，CZERSKI G，GRZYWACZ P，et al. Comparison of the gasification of coals and their chars with CO₂ based on the formation kinetics of gaseous products[J]. Thermochimica Acta，2017，653:97-105.
[3]	SINGH P，DEPARROIS N，BURRA K G，et al. Energy recovery from cross-linked polyethylene wastes using pyrolysis and CO₂assisted gasification[J]. Applied Energy，2019，254:113722.
[4]	LIU Z，ZHANG F，LIU H，et al. Pyrolysis/gasification of pine sawdust biomass briquettes under carbon dioxide atmosphere:Study on carbon dioxide reduction（utilization）and biochar briquettes physicochemical properties[J]. Bioresour Technol，2018，249:983-991.
[5]	POLICELLA M，WANG Z，BURRA K G，et al. Characteristics of syngas from pyrolysis and CO₂-assisted gasification of waste tires[J]. Applied Energy，2019，254（15）:113678.
[6]	CHAN Y H，SYED A R S N F，LAHURI H M，et al. Recent progress on CO-rich syngas production via CO₂ gasification of various wastes:A critical review on efficiency，challenges and outlook[J]. Environ Pollut，2021，278:116843.
[7]	SUSASTRIAWAN A A P，SAPTOADI H，PURNOMO. Small-scale downdraft gasifiers for biomass gasification:A review[J]. Renewable and Sustainable Energy Reviews，2017，76:989-1003.
[8]	SIKARWAR V S，ZHAO M，CLOUGH P，et al. An overview of advances in biomass gasification[J]. Energy& Environmental Science，2016，9（10）:2939-2977.
[9]	SIDEK F N，ABDUL SAMAD N A F，SALEH S. Review on effects of gasifying agents，temperature and equivalence ratio in biomass gasification process[J]. IOP Conference Series:Materials Science and Engineering，2020，863（1）:012028.
[10]	RATCHAHAT S，KODAMA S，TANTHAPANICHAKOON W，et al. CO₂ gasification of biomass wastes enhanced by Ni/Al₂O₃ catalyst in molten eutectic carbonate salt[J]. International Journal of Hydrogen Energy，2015，40（35）:11809-11822.
[11]	LAHIJANI P，ZAINAL Z A，MOHAMED A R，et al. CO₂ gasification reactivity of biomass char:catalytic influence of alkali，alkaline earth and transition metal salts[J]. Bioresour Technol，2013，144:288-295.
[12]	China Industry Development Promotion Association Biomass Energy Industry Branch. 3060 zero-carbon biomass energy development potential blue book[R]. Beijing:China Industry Development Promotion Association Biomass Energy Industry Branch，2021. 中国产业发展促进会生物质能产业分会. 3060 零碳生物质能发展潜力蓝皮书[R]. 北京:中国产业发展促进会生物质能产业分会，2021.
[13]	ZHANG X S. Experimental study on the resource-based disposal process of industrial sludge and biomass gasification[D]. Beijing:Beijing University of Chemical Technology，2018. 张行思. 工业污泥、生物质气化资源化处置工艺实验研究[D]. 北京:北京化工大学，2018.
[14]	WANG Q，LUO C，LI X，et al. Development of LaFeO₃modified with potassium as catalyst for coal char CO₂gasification[J]. Journal of CO₂ Utilization，2019，32:163-169.
[15]	MCKEE D W. Mechanisms of the alkali metal catalyzed gasification of carbon[J]. Fuel，1983，62（2）:170-175.
[16]	PORADA S，CZERSKI G，GRZYWACZ P，et al. Comparison of the gasification of coals and their chars with CO₂ based on the formation kinetics of gaseous products[J]. Thermochimica Acta，2017，653:97-105.
[17]	SINGH P，DEPARROIS N，BURRA K G，et al. Energy recovery from cross-linked polyethylene wastes using pyrolysis and CO₂ assisted gasification[J]. Applied Energy，2019，254:113722.
[18]	JAN K，MOSHFIQUR R，RAJENDER G. K₂CO₃ catalyzed CO₂ gasification of ash-free coal. Interactions of the catalyst with carbon in N₂ and CO₂ atmosphere. Fuel，2014，117:1181-1189.
[19]	Wu C，BUDARIN V L，WANG M，et al. CO₂ gasification of bio-char derived from conventional and microwave pyrolysis[J]. Applied Energy，2015，157:533-539.
[20]	LV D，XU M，LIU X，et al. Effect of cellulose，lignin，alkali and alkaline earth metallic species on biomass pyrolysis and gasification[J]. Fuel Processing Technology，2010，91（8）:903-909.
[21]	YANG H，SONG H，ZHAO C，et al. Catalytic gasification reactivity and mechanism of petroleum coke at high temperature[J]. Fuel，2021，293:120469.
[22]	TONG Q J，HU Y F，LI P，et al. Preparation of cobalt oxide catalysts and their application in ethylbenzene oxidation[J]. Anhui Chemical Industry，2023，49（1）:64-69. 童庆军，胡一凡，李平，等. 氧化钴催化剂的制备及其在乙苯氧化中的应用[J]. 安徽化工，2023，49（1）:64-69.
[23]	LV D，XU M，LIU X，et al. Effect of cellulose，lignin，alkali and alkaline earth metallic species on biomass pyrolysis and gasification[J]. Fuel Processing Technology，2010，91（8）:903-909.
[24]	REYES L，ABDELOUAHED L，CAMPUSANO B，et al. Exergetic study of beech wood gasification in fluidized bed reactor using CO₂ or steam as gasification agents[J]. Fuel Processing Technology，2021，213.
[25]	WANG X Y. Study on structure evolution of biomass high-temperature pyrolysis char and its steam gasification characteristics[D]. Harbin:Harbin Institute of Technology，2022. 王鑫雨. 生物质高温热解焦结构演化及其水蒸气气化特性研究[D]. 哈尔滨:哈尔滨工业大学，2022.
[26]	XIE Y P. Experimental study on pyrolysis and gasification of biomass in molten carbonate[D]. Wuhan:Huazhong University of Science and Technology，2022. 谢迎谱. 生物质熔融碳酸盐热解与气化过程实验研究[D]. 武汉:华中科技大学，2022
[27]	JIANG H. Effect of pyrolysis temperature on physicochemical properties of biomass and co-gasification of semi-coke/coal[D]. Huainan:Anhui University of Science and Technology，2022. 江环. 热解温度对生物质理化性质的影响及半焦/煤共气化研究[D]. 淮南:安徽理工大学，2022.
[28]	LIU Y，LIU L，HONG L. Gasification of char with CO₂ to produce CO-Impact of catalyst carbon interface[J]. Catalysis Today，2017，281:352-359.
[29]	FAN S，YUAN X，ZHAO L，et al. Experimental and kinetic study of catalytic steam gasification of low rank coal with an environmentally friendly，inexpensive composite K₂CO₃-eggshell derived CaO catalyst[J]. Fuel，2016，165:397-404.
[30]	WANG Z，BURRA K G，ZHANG M，et al. Syngas evolution and energy efficiency in CO₂-assisted gasification of pine bark[J]. Applied Energy，2020，269（1）:114996.
[31]	MAUERHOFER A M，FUCHS J，MüLLER S，et al. CO₂ gasification in a dual fluidized bed reactor system:Impact on the product gas composition[J]. Fuel，2019，253:1605-1616.