Chemical engineering transactions最新文献_第9页

Sequential Reductive/oxidative Bioelectrochemical Process for Groundwater Perchloroethylene Removal 顺序还原/氧化生物电化学法去除地下水过氯乙烯

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186063

M. Zeppilli, Edoardo Dell’Armi, M. P. Papini, M. Majone

{"title":"Sequential Reductive/oxidative Bioelectrochemical Process for Groundwater Perchloroethylene Removal","authors":"M. Zeppilli, Edoardo Dell’Armi, M. P. Papini, M. Majone","doi":"10.3303/CET2186063","DOIUrl":"https://doi.org/10.3303/CET2186063","url":null,"abstract":"Chlorinated aliphatic hydrocarbons (CAHs) are common groundwater contaminants, microbial communities naturally present in groundwater can reduce CAHs as perchloroethylene (PCE) and trichloroethylene (TCE) to ethylene through reductive dechlorination (RD) reaction while low chlorinated CAHs like cis-dichloroethylene (cis DCE) and vinyl chloride (VC) can be oxidized by aerobic pathways. A combination of reductive and oxidative dechlorination results an effective strategy for the complete mineralization of CAHs. Bioelectrochemical systems (BES) are innovative processes which can be adopted to stimulate both reductive and oxidative dechlorination biomass through polarized electrodes. The present study describes the performances of a an oxidative bioelectrochemical reactor composed by a membrane-less microbial electrolysis cell (MEC) equipped with an internal graphite counterelectrode. In the oxidative reactor the oxygen provided by a mixed metal oxides (MMO) anode stimulated the oxidative dechlorination of the cisDCE contained in synthetic groundwater. Throughout the experimental period, both reductive and oxidative dechlorination pathways were identified due to presence of an internal counter electrode that acted as electron donor. Reductive and oxidative bioelectrochemical reactions, including anions reduction were determined and their relative contribution to the overall flowing current has been quantified in terms of oxidative and reductive coulombic efficiencies.","PeriodicalId":9695,"journal":{"name":"Chemical engineering transactions","volume":"94 1","pages":"373-378"},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86255436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Life Cycle Assessment of Pvc-a Polymer Alloy Pipes for the Impacts Reduction in the Construction Sector Pvc-a聚合物合金管材的生命周期评估对建筑行业的影响

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186121

Alessandro Marson, A. Manzardo, Mirco Piron, A. Fedele, A. Scipioni

引用次数: 1

Reaction Kinetics Study of Methanol Dehydration for Dimethyl Ether (dme) Production Using Dealuminated Zeolite Y Catalyst 脱铝Y型沸石催化甲醇脱水生产二甲醚的反应动力学研究

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186251

L. Buchori, D. Anggoro

引用次数: 1

A Critical Analysis on Green and Low-temperature Methods for the Production of Carbon Nanoparticles 绿色低温法制备纳米碳的关键分析

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186135

A. Reverberi, M. Vocciante, A. Bruzzone, B. Fabiano

{"title":"A Critical Analysis on Green and Low-temperature Methods for the Production of Carbon Nanoparticles","authors":"A. Reverberi, M. Vocciante, A. Bruzzone, B. Fabiano","doi":"10.3303/CET2186135","DOIUrl":"https://doi.org/10.3303/CET2186135","url":null,"abstract":"Carbon nanoparticles (CNPs) gained a growing attention for a wide multiplicity of applications. CNPs offer the basic advantage of being well tolerated by living organisms and they are much more environmental friendly than many other inorganic NPs for analogous purposes. In this short review, several techniques are described and compared, enlighting their strenghts and drawbacks in terms of easy of deployment, possibility of transfer on a large scale, plant safety and environmental soundness. The latter aspect is now one of the basic paradigms for the chemical production tout court and this target can be achieved by acting on different fronts, namely energy saving, cleaner processes and reagents substitution. Some techniques are still confined to a laboratory scale and they need deeper investigations before being transferred to an industrial production, while some other have reached a technological maturity to make them competitive on the market. The methods for the synthesis of CNPs have been grouped according to a scheme different from the usual classification in top-down and bottom-up processes. A greater emphasis has been given to the simplicity of unit operations and to the corresponding energy burden.","PeriodicalId":9695,"journal":{"name":"Chemical engineering transactions","volume":"1 1","pages":"805-810"},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90363074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Molecular dynamics simulation of the interactions between carbon dioxide and a natural-based carbonaceous microporous material 二氧化碳与天然碳质微孔材料相互作用的分子动力学模拟

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186186

C. Moliner, Beatrice Antonucci, Simona Focacci, J. M. Heap, Aldo Moreno Martel, F. Hamzah, C. Martín, A. Martinez-Felipe

引用次数: 2

Identifying Safety Objectives and Functions for Emergency Shutdown in the Design Phase by Using Functional Modelling 在设计阶段利用功能模型确定紧急停车的安全目标和功能

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186162

Jing Wu, Mengchu Song, Xinxin Zhang, M. Lind

{"title":"Identifying Safety Objectives and Functions for Emergency Shutdown in the Design Phase by Using Functional Modelling","authors":"Jing Wu, Mengchu Song, Xinxin Zhang, M. Lind","doi":"10.3303/CET2186162","DOIUrl":"https://doi.org/10.3303/CET2186162","url":null,"abstract":"This paper proposes a functional modelling method, called Multilevel Flow Modelling (MFM) for identification of safety objectives and functions of emergency shutdown (ESD) system in the design phase for emergency shutdown safely. Firstly, the required information for designing safety objectives and functions for an emergency shutdown is analysed. The information includes process topology, the initial state of the process, the shutdown objectives, and other constraints, such as design and operational limits of unit operations and hazardous and environmental constraints. Secondly, a procedure is proposed based on the required information by using MFM. The procedure incorporates steps: 1) The MFM model of the process in normal operations are built by following modelling procedures, 2) Initiate states are defined and changing conditions are identified of the process when it shuts down unplanned by using the objective-function tree in the MFM modelling, 3) The goals of the shutdown operation are defined, 4) With the consideration of the shutdown operating goals and changing conditions, the first safety function during shutdown process are identified by using MFM causal reasoning, 5) By using MFM consequence reasoning based on the first identified safety function represented in the MFM model, the rest of the safety functions are identified, and the emergency shutdown procedures are generated. This procedure is demonstrated by designing safety functions in an emergency shut down of a seawater deaeration process in a seawater injection system. The results show that the produced emergency shut down procedure based on the proposed method is feasible and that it can be validated against the real operating procedure.","PeriodicalId":9695,"journal":{"name":"Chemical engineering transactions","volume":"25 1","pages":"967-972"},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87230909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Treatment of a Biological Effluent Containing Metronidazole 含甲硝唑生物废水的处理

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186100

Yerkanat N. Kanafin, A. Satayeva, E. Arkhangelsky, S. Poulopoulos

{"title":"Treatment of a Biological Effluent Containing Metronidazole","authors":"Yerkanat N. Kanafin, A. Satayeva, E. Arkhangelsky, S. Poulopoulos","doi":"10.3303/CET2186100","DOIUrl":"https://doi.org/10.3303/CET2186100","url":null,"abstract":"Emerging pollutants like metronidazole (MNZ) affect the removal efficiency of conventional activated sludge (CAS) based wastewater treatment plants and can escape traditional treatment facilities. Advanced oxidation processes (AOPs) and membrane filtration could complement the existing processes to completely eliminate pollutants of emerging concern in wastewaters. This work investigated the application of photochemical processes for treating a synthetic wastewater effluent from CAS treatment and membrane filtration of the biological effluents after CAS experiments with MNZ, caffeine (CAF) and ibuprofen (IBU). Photochemical experiments were conducted in a batch photochemical reactor. The influence of different chemical species such as H2O2, Fe(II), K2S2O8 and TiO2 and of pH value in the system were studied in terms of TOC removal and MNZ degradation. The application of UV/K2S2O8/Fe(II) resulted in 78 % TOC removal in the effluent. Complete degradation of MNZ was observed after 30 min of treatment in the following experiments: UV/H2O2/Fe(II) at pH 3 and UV/K2S2O8. Moreover, the effluents were treated by means of a membrane bioreactor (MBR). Polycarbonate track-etch membranes of 50 and 100 nm pore size were used. The results obtained showed that the carbon removal by the MBR was comparable with the conventional biological treatment. Rejection of MNZ depends on the presence/absence of other emerging contaminants in the wastewater effluents.","PeriodicalId":9695,"journal":{"name":"Chemical engineering transactions","volume":"6 1","pages":"595-600"},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78831488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Waste-to-methanol: Direct CO2 Emissions Assessment for the Methanol Production from Municipal Waste-derived Syngas 废物制甲醇:城市废物合成气制甲醇的直接二氧化碳排放评估

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186086

E. Catizzone, A. Giuliano, D. Barletta

{"title":"Waste-to-methanol: Direct CO2 Emissions Assessment for the Methanol Production from Municipal Waste-derived Syngas","authors":"E. Catizzone, A. Giuliano, D. Barletta","doi":"10.3303/CET2186086","DOIUrl":"https://doi.org/10.3303/CET2186086","url":null,"abstract":"The valorization of municipal waste represents one of the major opportunities for the next future. In particular, the Organic Fraction of Municipal Solid Waste (OFMSW) can be used in anaerobic digesters to produce biogas/biomethane. Furthermore, a fraction of Municipal Solid Waste (e.g. non-recyclable plastics, paper cardboard, etc.) can be converted to Refuse Derived Fuel (RDF). Both biogas/biomethane and RDF may be further converted in syngas (a mixture of H2, CO and CO2) by using several technologies, such as steam reforming for the former, and gasification for the latter. Syngas may be used as fuel in CHP plants or for the production of chemical intermediates and fuel. The digestate derived from anaerobic digestion, as well as CO2 from biogas, can be used as nutrients source to grow microalgae, which are feedstock suitable for supercritical water gasification (SWG). In this paper, an integrated process is proposed, by coupling an anaerobic digestion plant for biomethane production with (i) high-temperature gasification of RDF and (ii) SWG of algae grown up with digestate and CO2 from biogas. The biomethane is assumed to be converted in syngas by steam reforming. Considering its importance for the chemical industry chain, methanol is considered as a target product. Methanol synthesis is assessed in terms of mass and energy balances and direct CO2 emissions. The results show that high-temperature endothermic processes require the use of purge gas as a fuel in a burner to sustain itself. The lowest direct CO2 emission value per kg of methanol produced is obtained in the case of high use of RDF, minimum recycling of CO2 to algae production and minimum purge ratio.","PeriodicalId":9695,"journal":{"name":"Chemical engineering transactions","volume":"105 1","pages":"511-516"},"PeriodicalIF":0.0,"publicationDate":"2021-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77006400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two Phase CFD Simulations in Stagnant Water Pools: Unsteady Temperature and Level Variation 滞水池的两相CFD模拟:非定常温度和水位变化

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186253

A. Ganguli, A. Pandit

引用次数: 0

Removal of Dyes from Wastewater Using the Residue from the Chemical Recycling of Glass Cullet 利用玻璃碎料化学回收废渣去除废水中的染料

Chemical engineering transactions Pub Date : 2021-06-15 DOI: 10.3303/CET2186105

P. Primerano, Concetta Saja, M. Milazzo, F. Lanuzza

引用次数: 0