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化工进展Chemical Industry and Engineering Progress2024 年第 43 卷第 3 期含钛高炉渣制备复合吸附剂及其铬吸附性能董晓涵，田月，苏毅（昆明理工大学化学工程学院，云南 昆明 650000）摘要：Cr(Ⅵ)是一种有害污染物，既污染水环境，也会对人体造成伤害。
本文以工业固废含钛高炉渣为原料，通过酸浸得到浸出渣基体，经壳聚糖改性，制备一种新型GLZ-jcz/CS 复合吸附剂，用来去除废水中的Cr(Ⅵ)。
研究了吸附温度、废水pH 、吸附剂量、Cr(Ⅵ)初始浓度、吸附时间对Cr(Ⅵ)吸附性能的影响。
以Cr(Ⅵ)吸附率为评价指标，确定最优实验条件，并研究了GLZ-jcz/CS 复合吸附剂的再生性能。
采用扫描电子显微镜、傅里叶红外变换光谱仪、X 射线光电子能谱仪 、BET 比表面积测试仪对GLZ-jcz/CS 复合吸附剂进行表征，结合吸附动力学模型和吸附等温线模型分析，确定吸附机理。
实验结果表明：当吸附温度为70℃、废水pH=4、吸附剂用量为0.13g 、Cr(Ⅵ)初始浓度为50mg/L 、吸附时间为2h 时，吸附率达到99.8%，吸附容量可以达到67mg/g ，GLZ-jcz/CS 复合吸附剂经过6次洗脱，吸附率仍可达到96%以上，吸附模型符合拟二级动力学模型和Langmuir 吸附等温模型。
关键词：复合吸附剂；Cr(Ⅵ)吸附率；动力学模型；等温线模型；含钛高炉渣；壳聚糖改性中图分类号：X52 文章编号：A 文章编号：1000-6613（2024）03-1552-13Study on the preparation of composite adsorbent with titanium-containing blast furnace slag and chromium adsorption performanceDONG Xiaohan ，TIAN Yue ，SU Yi(School of Chemical Engineering, Kunming University of Science and Technology, Kunming 650000, Yunnan, China)Abstract: Cr(Ⅵ) is a harmful pollutant that not only pollutes the water environment but also causes harm to humans. In this paper, a new composite adsorbent (GLZ-jcz/CS) was prepared for the removal of Cr(Ⅵ) from wastewater, using industrial solid waste containing titanium blast furnace slag as raw material, and the leached slag matrix was obtained by acid leaching and modified by chitosan. The effects of adsorption temperature, pH of wastewater, adsorbent dosage, initial concentration of Cr(Ⅵ) and adsorption time on the adsorption performance of Cr(Ⅵ) were studied. The optimal experimental conditions were determined using the Cr(Ⅵ) adsorption rate as the evaluation index, and the regeneration performance of GLZ-jcz/CS composite adsorbent was investigated. The GLZ-jcz/CS composite adsorbent was characterized by SEM, FTIR, XPS and BET, combined with adsorption kinetic model and adsorption isotherm model analysis to determine the adsorption mechanism. The experimental results showed that the adsorption rate reached 99.8% and the adsorption capacity could reach 67mg/g when the adsorption temperature was 70℃, the pH of wastewater was 4, the amount of adsorbent was 0.13g, the initial concentration of Cr(Ⅵ) was 50mg/L and the adsorption time was 2h. The GLZ-jcz/CS composite adsorbent can still reach over 96% adsorption after six elutions, and the adsorption model was compounded with the proposed secondary kinetic model研究开发DOI ：10.16085/j.issn.1000-6613.2023-0343收稿日期：2023-03-06；修改稿日期：2023-05-08。
DOI: 10.1016/S1872-5813(21)60177-9铌元素改性V 2O 5-WO 3/TiO 2催化剂降低脱硝过程 SO 2 的氧化率王 博1，边 瑶1，封 硕1，王少奇1，沈伯雄1,2,*（1. 河北工业大学 能源与环境工程学院, 天津市清洁能源利用与污染物控制重点实验室, 天津 300401；2. 河北工业大学 化工学院, 天津 300401）摘 要：本文采用浸渍法制备了Nb 改性的V 2O 5-WO 3/TiO 2催化剂，研究了脱硝反应中Nb 负载量对催化剂SO 2氧化活性的影响。
结果表明，在350 °C 下，Nb 2O 5负载量为2%的Nb 2O 5-V 2O 5-WO 3/TiO 2催化剂上的SO 2氧化率最低（0.6%），而同时NO x 的转化率仍能达到95%。
采用TGA 、氮吸附、XRD 、H 2-TPR 、CO 2-TPD 、XPS 和in- situ DRIFTS 等对催化剂进行了表征分析，结果显示，Nb 改性后V 2O 5-WO 3/TiO 2催化剂的晶体结构没有发生明显改变，但是其比表面积小幅度下降，有助于减少对SO 2的吸附；同时，改性后催化剂表面的吸附氧含量下降，氧化还原性能也稍微减弱，这有利于降低其对SO 2的氧化活性。
in-situ DRIFTS 结果表明，Nb 改性后的Nb-V 2O 5-WO 3/TiO 2催化剂反应过程中表面中间产物VOSO 4的含量明显下降，从而减少了SO 3的生成量。
关键词：SO 2氧化；Nb 改性；V 2O 5-WO 3/TiO 2催化剂；NH 3-SCR 脱硝中图分类号： X51;TQ42 文献标识码： AModification of the V 2O 5-WO 3/TiO 2 catalyst with Nb to reduce its activityfor SO 2 oxidation during the selective catalytic reduction of NO xWANG Bo 1，BIAN Yao 1，FENG Shuo 1，WANG Shao-qi 1，SHEN Bo-xiong1,2,*（1. College of Energy and Environmental Engineering , Hebei University of Technology , Key Laboratory of Clean EnergyUtilization and Pollutant Control in Tianjin , Tianjin 300401, China ；2. College of chemical engineering , Hebei University of Technology , Tianjin 300401, China ）Abstract: A series of Nb-modified V 2O 5-WO 3/TiO 2 catalysts were prepared by the impregnation method and the effect of Nb loading on their SO 2 oxidation activity during the selective catalytic reduction of NO x was investigated.The results indicate that the Nb 2O 5-V 2O 5-WO 3/TiO 2 catalyst with a Nb 2O 5 loading of 2% exhibits the lowest SO 2conversion of 0.6% for oxidation at 350 °C, whereas the conversion of NO x is still above 95%. The catalysts were characterized by TGA, BET, XRD, H 2-TPR, CO 2-TPD, XPS and in-situ DRIFTS. The results illustrate that the influence of Nb modification on the crystal structure of V 2O 5-WO 3/TiO 2 catalyst is rather insignificant; however, the surface area of the Nb 2O 5-V 2O 5-WO 3/TiO 2 catalyst decreases slightly after the modification with Nb, conducing to a decrease of SO 2 adsorption on the catalyst. Meanwhile, the content of oxygen adsorbed on the catalyst surface decreases considerably upon the Nb modification, suggesting a weakened redox performance, which is beneficial to reducing the oxidation of SO 2. The in-situ DRIFTS results illustrate that the content of the intermediate VOSO 4product on the catalyst surface decreases over the Nb-modified Nb 2O 5-V 2O 5-WO 3/TiO 2 catalyst, leading to a decrease of SO 3 production.Key words: SO 2 oxidation ；Nb modification ；V 2O 5-WO 3/TiO 2；removal of NO x by NH 3-SCR烟气中的SO 3主要来源于SO 2与氧气在高温下的直接氧化以及SCR 脱硝催化剂的催化氧化[1]。
Ag掺杂纳米二氧化钛的制备及光催化性能研究＊张理元,刘钟馨,于晓龙,吕作凤,曹 阳(海南大学材料与化工学院,海南优势资源化工材料应用技术教育部重点实验室,硅锆钛资源综合开发与利用海南省重点实验室,海南海口570228)摘 要: 采用溶胶-凝胶法制备了A g掺杂纳米二氧化钛。
采用SEM、XPS、XRD、UV-Vis对样品进行表征。
结果表明,未掺杂的样品的粒径在80～100nm, Ag掺杂的样品的粒径在40～50nm;Ag元素成功进入晶格,含量为0.67%(原子分数);400℃热处理时,掺杂与未掺杂样品晶型基本相同,600℃热处理时,掺杂能够抑制样品晶型的转变;掺杂使二氧化钛的吸收带边发生了一定的红移。
在此条件下Ag的最佳掺杂量为0.5%,最佳热处理温度为600℃。
在最佳条件下,以甲基橙为模拟污染物,经过120min的光催化实验,降解率达到97.9%。
关键词: 溶胶-凝胶法;纳米二氧化钛;Ag掺杂;光催化性能中图分类号: O614文献标识码:A 文章编号:1001-9731(2010)12-2169-051 引 言二氧化钛作为一种重要的无机半导体材料,在太阳能光解水,污水处理等方面有着重要的应用前景。
但禁带宽度约3.2eV的二氧化钛激发产生电子-空穴对时需用紫外线光照射,而紫外光只占太阳光的5%左右,其电荷载流子复合速率很快,所以其在太阳光下的光催化活性及对污染物的降解效率不高,从而限制了二氧化钛光催化剂的广泛应用。
大量研究实验证明,通过掺杂可有效提高二氧化钛的光催化活性,拓宽其光响应范围。
目前对于二氧化钛掺杂方法很多,大体可分为非金属掺杂[1]和金属掺杂[2]。
非金属元素掺杂二氧化钛具有可见光活性的原理一般是在二氧化钛中引入晶格氧空位,或部分氧空位被非金属元素取代,形成TiO2-x A x(A代表非金属元素)晶体,降低二氧化钛的禁带宽度,从而拓宽二氧化钛的光响应范围。
掺杂的非金属一般是N、C、F等[3-6]。
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 2017年第36卷第6期·2190·化 工 进展过渡金属改性Y 型分子筛吸附脱除低碳烃中二甲基二硫醚赵亚伟，沈本贤，孙辉，詹国雄，侯柯（华东理工大学化工学院石油加工研究所，上海200237）摘要：采用离子交换法制备了CoY 、CuY 、NiY 分子筛，并在固定床吸附器上考察了工艺条件及原料烯烃含量对改性分子筛吸附脱除二甲基二硫醚性能的影响。
采用密度泛函理论计算二甲基二硫醚及异丁烯在CoY 、CuY 、NiY 分子筛上的竞争吸附行为。
最后考察了高温水蒸气对吸附剂的再生效果。
结果表明，CoY 、CuY 和NiY 分子筛对二甲基二硫醚的动态饱和吸附硫容分别为47.5mg/g 、36.3mg/g 和40.2mg/g ；其中CoY 和NiY 分子筛硫容量受烯烃含量的影响较大，CuY 分子筛受影响较小。
计算结果表明，吸附过程中S —S 键的Mayer 键级变化不大，烯烃中C =C 键双键性质减弱。
二甲基二硫醚在CoY 、CuY 和NiY 分子筛上的吸附能分别为–59.5kJ/mol 、–22.2kJ/mol 和–30.4kJ/mol ，与实验数据吻合。
吸附饱和后的分子筛经160℃水蒸气脱附60min 后能够有效再生，且多次再生后吸附剂硫容仍保持在新鲜吸附剂的97%以上。
关键词：脱硫；烯烃；竞争吸附；密度泛函理论中图分类号：TE622 文献标志码：A 文章编号：1000–6613（2017）06–2190–07 DOI ：10.16085/j.issn.1000-6613.2017.06.032Study on adsorption removal of DMDS from light hydrocarbons usingtransition metal ions modified Y zeoliteZHAO Yawei ，SHEN Benxian ，SUN Hui ，ZHAN Guoxiong ，HOU Ke（Research Institute of Petroleum Processing ，School of Chemical Engineering ，East China University of Science andTechnology ，Shanghai 200237，China ）Abstract ： CoY ，CuY and NiY zeolites were prepared by ion-exchange method. Influences of operation conditions and olefin content on adsorption desulfurization performances were investigated by dynamic adsorption experiments. Adsorption behaviors of dimethyl disulfide （DMDS ）and isobutene onto CoY ，CuY and NiY zeolites were calculated using density function theory. Saturated adsorbents were regenerated in superheated steam. Results show that adsorption desulfurization capacities of CoY ，NiY and CuY are 47.5mg/g 、36.3mg/g and 40.2mg/g ，respectively ，and CoY and NiY were more easily to be influenced by olefin competitive adsorption. The Mayer bond order of S —S is not much changed after adsorption while the double bond property was weakened. The adsorption energies of CoY ，CuY and NiY are –59.5kJ/mol ，–22.2kJ/mol and –30.4kJ/mol ，respectively ，which were consistent with the experimental results. Saturated adsorbents could be effectively regenerated in steam at 160℃ for 60min. Key words ：desulfurization ；olefin ；competitive adsorption ；density function theory （DFT ）世界工业化进程的不断发展使燃料消耗量逐年增加，而全球经济快速发展的同时，自然环境也面临着日益严峻的污染问题。
铌基光催化剂的研究进展赵 迎1，郭永成2，杨丽娜1，吕振波1（1. 辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001；2. 中国石油 抚顺石化分公司洗化厂，辽宁 抚顺 113001）［摘要］综述了铌基光催化剂包括铌盐、铌的氧化物的研究进展，铌盐和Nb 2O 5是目前该领域的研究重点，铌盐光催化剂种类丰富，铌酸钾研究较多，主要集中在催化剂的掺杂、插层和复合改性；Nb 2O 5研究主要包括催化剂孔道、形貌的调变以及利用掺杂、复合、负载及表面修饰等对催化剂改性。
目前铌基光催化剂的应用主要集中于废水中有机污染物的降解和光解水制氢，拓宽催化剂在有机污染物降解领域的应用和通过负载进一步提高催化剂光催化活性是未来研究的主要方向。
［关键词］铌基催化剂；光催化；改性［文章编号］1000-8144（2020）12-1228-07 ［中图分类号］TQ 426.94 ［文献标志码］AReview of Nb -based photocatalysisZhao Ying 1，Guo Yongcheng 2，Yang Lina 1，Lü Zhenbo 1（1. College of Petroleum and Chemical Engineering ，Liaoning Shihua University ，Fushun Liaoning 113001，China ；2. Washing Plant of PetroChina Fushun Petrochemical Company ，Fushun Liaoning 113001，China ）［Abstract ］The research progress of Nb based photocatalysts ，including niobium salts and niobium oxides ，is reviewed. At present ，Nb salt and Nb 2O 5 are the research focus in this field. There are many kinds of Nb salt photocatalysts. The research on potassium niobate mainly focuses on the doping ，intercalation and composite modification of the catalyst. For Nb 2O 5，the research work mainly includes the modulation of the pore channel and morphology of the catalyst and the modification of the catalyst by doping ，compounding ，loading and surface modification. At present ，the application of Nb based photocatalysts is mainly focused on the degradation of organic pollutants in wastewater and photolysis of water for hydrogen production. Broadening its application in the field of organic pollutant degradation and further improving its photocatalytic activity through loading are the main research directions in the future.［Keywords ］Nb based catalyst ；photocatalysis ；modificationDOI ：10.3969/j.issn.1000-8144.2020.12.012［收稿日期］2020-07-21；［修改稿日期］2020-09-23。
