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diesel generator exhaust heat recovery fully-coupled with intake air heating for off-grid mining operations:An experimental,numerical,and analytical evaluation

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International Journal of Mining Science and Technology 2022年第1期32卷 155-169页

作者： Durjoy Baidya Marco Antonio Rodrigues de Brito Agus PSasmito Seyed Ali Ghoreishi-Madiseh Norman B.Keevil Institute of Mining Engineering The University of British ColumbiaVancouver V6T 1Z4Canada Department of Mining and Materials Engineering McGill UniversityMontreal H3A 2A7Canada

The customarily discarded exhaust from the fossil fuel-based power plants of the off-grid mines holds the thermal potential to fulfill the heating requirement of the underground *** present research fills in an important research gap by investigating the coupling effect between a diesel exhaust heat recovery and an intake air heating system employed in a remote *** integrative approach comprising analytical,numerical,and experimental assessment has been *** novel analytical model developed here establishes the reliability of the proposed mine heating system by providing comparative analysis between a coupled and a decoupled *** effect of working fluid variation has been examined by the numerical analysis and the possible improvement has been *** investigations present a demonstration of the successful lab-scale implementation of the concept and validate the numerical and analytical models *** deployment of the fully coupled mine heating system proposed here will assist the mining industry on its journey towards energy-efficient,and sustainable mining practices through nearly 70%reduction in fossil fuel consumption for heating intentions.

关键词： Remote mines Waste heat utilization diesel exhaust Combined heat and power generation Clean energy in mining Coupled heating system

DeNOx Study in diesel Engine exhaust Using Barrier Discharge Corona Assisted by V_2O_5/TiO_2 Catalyst

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Plasma Science and Technology 2004年第4期6卷 2411-2415页

作者： B.S.Rajanikanth V.Ravi Indian Institute of Science Bangalore 560012IndiaIndian Institute of ScienceBangalore 560012India

A plasma-assisted catalytic reactor was used to remove nitrogen oxides (NOx)from diesel engine exhaust operated under different load conditions. Initial studies were focused onplasma reactor (a dielectric barrier discharge reactor) treatment of diesel exhaust at varioustemperatures. The nitric oxide (NO) removal efficiency was lowered when high temperature exhaust wastreated using plasma reactor. Also, NO removal efficiency decreased when 45% load exhaust wastreated. Studies were then made with plasma reactor combined with a catalytic reactor consisting ofa selective catalytic reduction (SCR) catalyst, V_2O_5/TiO_2. Ammonia was used as a reducing agentfor SCR process in a ratio of 1:1 to NOx. The studies were focused on temperatures of the SCRcatalytic reactor below 200℃. The plasma-assisted catalytic reactor was operated well to remove NOxunder no-load and load conditions. For an energy input of 96 J/l, the NOx removal efficienciesobtained under no-load and load conditions were 90% and 72% respectively at an exhaust temperatureof 100 ℃.

关键词： non-thermal plasma DeNOx barrier discharge diesel exhaust

Effect of temperature tuning on the aerosol acoustic aggregation process

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Journal of Environmental Sciences 2018年第5期30卷 161-170页

作者： Zhenghui Qiao Wei Dong Yaji Huang Vincenzo Naso Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy & Environment Southeast University Department of Mechanical and Aerospace Engineering SAPIENZA University of Rome

diesel exhaust aerosols（DEAs） can absorb and accumulate toxic metal particulates and bacteria suspended in the atmospheric environment, which impact human health and the *** use of acoustic standing waves（ASWs） to aggregate DEA is currently considered to be an efficient particle removal method; however, study of the effect of different temperatures on the acoustic aggregation process is scarce. To explore the method and technology to regulate and optimize the aerosol aggregation process through temperature tuning, an acoustic apparatus integrated with a temperature regulation function was constructed. Using this apparatus, the effect of different characteristic temperatures（CTs） on the aerosol aggregation process was investigated experimentally in the ASW environment. Under constant conditions of acoustic frequency 1.286 kHz, voltage amplitude 17 V and input electric power 16.7 W, the study concentrated on temperature effects on the aggregation process in the CT range of 58–72℃. The DEA opacity was used. The results demonstrate that the aggregation process is quite sensitive to the CT, and that the optimal DEA aggregation can be achieved at 66℃. The aggregated particles of 68.17 μm are composed of small nanoparticles of 13.34–62.15 nm. At CTs higher and lower than 66℃, the apparatus in non-resonance mode reduces the DEA aggregation level. For other instruments, the method for obtaining the optimum temperature for acoustic agglomeration is universal. This preliminary demonstration shows that the use of acoustic technology to regulate the aerosol aggregation process through tuning the operating temperature is feasible and convenient.

关键词： diesel exhaust Acoustic field Aggregation Acoustic standing wave Temperature Nanoparticles

Novel Electrically Stimulated Catalytic Converter Prototype for Replacement of Conventional Auto exhaust Emission Converters

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Journal of Shanghai Jiaotong university(Science) 2018年第1期23卷 85-96页

作者： HAMADE Thomas A. University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong University

High voltage electrostatics and corona discharge are utilized for various applications in pollution and environmental control. The traditional applications have many flaws due to improper construction of electrode design and assembly that cause system failure, in particular when electrically stimulated devices are exposed to high humidity. A new innovative-patented design by Hamade, electrically stimulated catalytic converter(ESCC),eliminates such flaws and shows the wide practical applications of the new design. The new design utilized previous patented designs and work of the same inventor but retrofitted for catalytic auto exhaust emission control. The current and previous patents include: employing electrically stimulated filtration(ESF) to replace high efficiency particulate air(HEPA) filters, treatment of biological and infectious diseases, electret fabrication, and, most notably, the invention of a new electrically stimulated catalytic converter(ESCC). The electrically stimulated catalytic converter invention includes an exhaust conduit fed from the engine exhaust port with a housed corona charger apparatus. The opposite end is opened to the atmosphere outside of the vehicle or connected to a reduced-size catalytic converter. The corona charger is intrusively or non-intrusively associated with a main flow path defined by the exhaust conduit. The corona charger includes at least one electrode, which may be recessed away from, the main flow path. A plurality of corona chargers may be used in various combinations, optimally a two dimensional grid. The electrically stimulated catalytic converter is adapted to treat and eliminate auto exhaust pollution emission to air.

关键词： corona catalytic converter diesel exhaust electrically stimulated catalytic converter(ESCC)

Preparation and Catalytic Performance of Potassium Titanate Used as Soot Oxidation Catalyst

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China Petroleum Processing & Petrochemical Technology 2013年第2期15卷 31-36页

作者： Gao Yuan Meng Xiuhong Pan Lihong Song Lijuan Duan Linhai Key Laboratory of Petrochemical Catalytic Science and Technology Liaoning Shihua University Shandong Tianhong New Energy Chemical Co. Ltd

To prepare potassium titanate catalyst, a novel citrate acid complex-combustion method using CH3COOK and Ti（OC4H9）4 as raw materials was developed. The crystalline phase and surface morphology of K2Ti205 were investigated by X-ray diffraction （XRD）, field emission scanning electron microscope （FE-SEM） and transmission electron microscope （TEM）. The impact of some factors, such as the type of contact between K2Ti205 and soot, the content of water vapor and SO2 in exhaust, and the repeated use on catalytic activity of K2Ti205 were studied by temperature programmed reaction （TPR）. A comparison between the new method and the reported ones on catalytic activity of potassium titanate was investigated. The results showed that K2Ti205 had high catalytic activity and good stability.

关键词： citrate acid complex-combustion method diesel exhaust potassium titanate soot oxidation

The catalytic behavior of La-Mn-O nanoparticle perovskite-type oxide catalysts for the combustion of the soot particle from the diesel engine

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Science Bulletin 2005年第14期 34-38页

作者： WANG Hong1,2, ZHAO Zhen1, XU Chunming1, LIU Jian1 & LU Zhixiao2 1. State Key Laboratory of Heavy Oil Processing, University of Petro- leum, Beijing 102249, China 2. Beijing Institute of Petrochemical Technology, Beijing 102617, China

The La1?xMx MnO3(M=Li, Na, K, Rb, x=0, 0.10, 0.25) perovskite-type oxides whose sizes are nanoparticle have been prepared by the citric acid-ligated method. The characters of the catalysts were characterized by means of XRD, IR, SEM and BET surface area measurement. The catalytic activity for the combustion of soot particulate was evaluated by a technique of the temperature-programmed reaction. In the LaMnO3 catalyst, the partial substitution of alkali metal (Li, Na, K, Rb) into A-site enhanced the catalytic activity for the combustion of soot particle. The La0.75K0.25MnO3 oxides are good candidate catalysts for the soot particle removal reaction, and the combustion tem- peratures of soot particle are between 285℃ and 430℃ when the contact of catalysts and soot is loose, and their catalytic activities for the combustion of soot particle are as good as supported Pt catalysts, which is the best catalyst system so far reported for soot combustion under loose con- tact conditions.

关键词： perovskite-type oxides diesel exhaust carbon particulate alkali metals catalyst.

Synthesis of CeO2 nanobranch and its enhanced ageing resistibility on the catalytic diesel soot oxidation

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Synthesis of CeO2 nanobranch and its enhanced ageing resisti...