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Pt–Ba–Ce/γ-Al2O3 催化剂，物理化学性质，NOx存储和还原，NOx 排放，H2 还原剂 1

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Transient emission simulation and optimization of turbocharged diesel engine

Lingge SUI, Zhongchang LIU, Yongqiang HAN, Jing TIAN

《能源前沿（英文）》 2013年 第7卷 第2期   页码 237-244 doi: 10.1007/s11708-013-0251-0

摘要： In order to alleviate the pressure of experimental research of turbocharged diesel engine under transient operations, a whole process simulation platform for turbocharged diesel engine under transient operations was established based on the multi-software coupling technologies of Matlab/Simulink, GT-Power, STAR-CD and artificial neural network. Aimed at the contradiction of NO and soot emission control with exhaust gas recirculation (EGR) of turbocharged diesel engine under transient operations, on this simulation platform, a transient EGR valve control strategy was proposed, which adjusted the EGR valve in adjacent level based on the feedback of its opening according soot control limit under transient operations. Simulation and experimental results prove that the transient emission optimization effect of this control strategy is obvious. On the one hand, compared with the previous control strategy, which closed the EGR valve during the whole transient operations, soot emission is slightly increased by 9.5%, but it is still 9% lower than the control limit. On the other hand, compared with the previous control strategy, NO transient emission is reduced by 44%.

关键词： diesel engine     transient simulation     emission     control strategy     exhaust gas recirculation (EGR)    

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Performance and emission characteristics of QHCCI dimethyl ether engine

WANG Ying, LI Wei, ZHOU Longbao, LIU Shenghua, HU Tiegang

《能源前沿（英文）》 2008年 第2卷 第4期   页码 401-405 doi: 10.1007/s11708-008-0075-5

摘要： Experimental investigation into the effects of different pilot amounts of dimethyl ether (DME) on the performance and emission of a single-cylinder direct-injection DME engine is conducted. The results show that a DME engine can operate at a wider range of speeds and loads at quasi-homogenous charge compression ignition (QHCCI) mode. The brake thermal efficiency increases while the exhaust temperature decreases. NO emission decreases by about 30%–50% although there is a slight increase in HC and CO emissions. NO, HC and CO emissions increase with an increase in the amount of DME pilot. QHCCI is a good way to increase thermal efficiency and decrease NO emission.

关键词： Experimental investigation     single-cylinder direct-injection     exhaust temperature     dimethyl     compression ignition    

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Performance and emission characteristics of a diesel engine operating on different water in diesel emulsion

Seyed Saeed HOSEINI, Mohammad Amin SOBATI

《能源前沿（英文）》 2019年 第13卷 第4期   页码 636-657 doi: 10.1007/s11708-019-0646-7

摘要： The nitrogen oxide (NO ) release of diesel engines can be reduced using water in diesel emulsion fuel without any engine modification. In the present paper, different formulations of water in diesel emulsion fuels were prepared by ultrasonic irradiation. The water droplet size in the emulsion, polydisperisty index, and the stability of prepared fuel was examined, experimentally. Afterwards, the performance characteristics and exhaust emission of a single cylinder air-cooled diesel engine were investigated using different water in diesel emulsion fuels. The effect of water content (in the range of 5%–10% by volume), surfactant content (in the range of 0.5%–2% by volume), and hydrophilic-lipophilic balance (HLB) (in the range of 5–8) was examined using Box-Behnken design (BBD) as a subset of response surface methodology (RSM). Considering multi-objective optimization, the best formulation for the emulsion fuel was found to be 5% water, 2% surfactant, and HLB of 6.8. A comparison was made between the best emulsion fuel and the neat diesel fuel for engine performance and emission characteristics. A considerable decrease in the nitrogen oxide emission (–18.24%) was observed for the best emulsion fuel compared to neat diesel fuel.

关键词： water in diesel emulsion fuel     hydrophilic-lipophilic balance (HLB)     response surface methodology (RSM)     emulsion stability     engine performance     exhaust emission    

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Identify the contribution of vehicle non-exhaust emissions: a single particle aerosol mass spectrometer

《环境科学与工程前沿（英文）》 2023年 第17卷 第5期 doi: 10.1007/s11783-023-1662-8

摘要：

● A single particle observation was conducted in a high traffic flow road environment.

关键词： Non-exhaust emissions     SPAMS     PMF     Roadside environment    

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Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat

Yiji LU, Anthony Paul ROSKILLY, Long JIANG, Longfei CHEN, Xiaoli YU

《能源前沿（英文）》 2017年 第11卷 第4期   页码 527-534 doi: 10.1007/s11708-017-0516-0

摘要： The development of engine waste heat recovery technologies attracts ever increasing interests due to the rising strict policy requirements and environmental concerns. This paper presented the study of engine coolant and exhaust heat recovery using organic Rankine cycle (ORC). Eight working fluids were selected to evaluate and compare the performance of the integrated waste heat recovery system. Rather than the conventional engine ORC system mainly focusing on the utilization of exhaust energy, this work proposed to fully use the engine coolant energy by changing the designed parameters of the ORC system. The case study selected a small engine as the heat source to drive the ORC system using a scroll expander for power production. The evaluation results suggest that under the engine rated condition, the solution to fully recover the engine coolant energy can achieve a higher power generation performance than that of the conventional engine ORC system. The results suggest that adding a recuperator to the ORC system can potentially improve the system performance when the working fluids are dry and the overall dumped heat demand of the system can be reduced by 12% under optimal conditions. When the ORC evaporating and condensing temperature are respectively set at 85°C and 30°C, the integrated engine waste heat recovery system can improve the overall system efficiency by 9.3% with R600, R600a or -Pentane as the working fluid.

关键词： organic Rankine cycle     scroll expander     coolant and exhaust recovery     internal combustion engine    

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Simulation and experiments on a solid sorption combined cooling and power system driven by the exhaust

Peng GAO, Liwei WANG, Ruzhu WANG, Yang YU

《能源前沿（英文）》 2017年 第11卷 第4期   页码 516-526 doi: 10.1007/s11708-017-0511-5

摘要： A solid sorption combined cooling and power system driven by exhaust waste heat is proposed, which consists of a MnCl sorption bed, a CaCl sorption bed, an evaporator, a condenser, an expansion valve, and a scroll expander, and ammonia is chosen as the working fluid. First, the theoretical model of the system is established, and the partitioning calculation method is proposed for sorption beds. Next, the experimental system is established, and experimental results show that the refrigerating capacity at the refrigerating temperature of –10°C and the resorption time of 30 min is 1.95 kW, and the shaft power is 109.2 W. The system can provide approximately 60% of the power for the evaporator fan and the condenser fan. Finally, the performance of the system is compared with that of the solid sorption refrigeration system. The refrigerating capacity of two systems is almost the same at the same operational condition. Therefore, the power generation process does not influence the refrigeration process. The exergy efficiency of the two systems is 0.076 and 0.047, respectively. The feasibility of the system is determined, which proves that this system is especially suitable for the exhaust waste heat recovery.

关键词： solid sorption     exhaust waste heat     combined cooling and power system     exergy efficiency    

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Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine

K. VENKATESWARLU, B. S. R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

《能源前沿（英文）》 2012年 第6卷 第3期   页码 304-310 doi: 10.1007/s11708-012-0195-9

摘要： Cetane improvers reduce the ignition delay, which in turn reduces the combustion temperatures thereby reduce NO emissions. Exhaust gas recirculation (EGR) proved to be an effective way to reduce the NO emissions. In this present experimental work, a combination of exhaust gas recirculation and cetane improver ethyl hexyl nitrate (EHN) is used to investigate the performance and exhaust emissions of a single cylinder four stroke naturally aspirated direct injection and air cooled diesel engine. Test results show that the brake thermal efficiency increases with the increase in the percentage of EGR which is accompanied by a reduction in brake specific fuel consumption and exhaust gas temperatures, and that bio-diesel with cetane improver under 20% EGR reduces NO emissions by 33% when compared to baseline fuel without EGR. However carbon monoxide (CO), hydro carbon (HC) and smoke emissions increase with an increase in percentage of EGR.

关键词： additive     exhaust gas recirculation (EGR)     emissions     ethyl hexyl nitrate (EHN)     performance    

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Utilisation of waste heat from exhaust gases of drying process

Olga P. Arsenyeva,Lidija Čuček,Leonid L. Tovazhnyanskyy,Petro O. Kapustenko,Yana A. Savchenko,Sergey K. Kusakov,Oleksandr I. Matsegora

《化学科学与工程前沿（英文）》 2016年 第10卷 第1期   页码 131-138 doi: 10.1007/s11705-016-1560-8

摘要： Nowadays a lot of low-grade heat is wasted from the industry through the off- and flue-gasses with different compositions. These gases provide the sensitive heat with utilisation potential and latent heat with the components for condensation. In this paper, process integration methodology has been applied to the partly condensed streams. A hot composite curve that represents the gas mixture cooling according to equation of state for real gases was drawn to account the gas-liquid equilibrium. According to the pinch analysis methodology, the pinch point was specified and optimal minimal temperature difference was determined. The location of the point where gas and liquid phases can be split for better recuperation of heat energy within heat exchangers is estimated using the developed methodology. The industrial case study of tobacco drying process off-gasses is analysed for heat recovery. The mathematical model was developed by using MathCad software to minimise the total annualised cost using compact plate heat exchangers for waste heat utilisation. The obtained payback period for the required investments is less than six months. The presented method was validated by comparison with industrial test data.

关键词： exhaust gas     waste heat     process integration     plate heat exchanger    

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Exhaust hood for steam turbines-single-flow arrangement

Michal HOZNEDL , Ladislav TAJC , Jaroslav KREJCIK , Lukas BEDNAR , Kamil SEDLAK , Jiri LINHART ,

《能源前沿（英文）》 2009年 第3卷 第3期   页码 321-329 doi: 10.1007/s11708-009-0039-4

摘要： In the past, increased attention was given to the development of an optimal shape for the inlet part of LP turbine casings in SKODA POWER. A double-flow design is typically used for high power output turbines. An optimized shape for the internal diffuser has been found, which transforms the kinetic energy of steam into increased pressure, thus effectively increasing the thermodynamic efficiency of the stage. Some conclusions have been drawn from laboratory experiments, others derived directly from on-site measurements at power plants. The conclusions from the development of double-flow turbines form the basis for the design of the single-flow turbine arrangement. Single-flow design is typically used for lower output turbines. There are still some limitations in applying this arrangement. The designer needs to resolve the bearing position and how to ensure access to them. Reinforcing the ribs and supports are used, therefore, to ensure the rigidity of the entire casing. The optimization of the single-flow diffuser shape is therefore the subject of the study presented below.

关键词： exhaust hood     steam turbines     single-flow arrangement    

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Combustion analysis of a hydrogen-diesel fuel operated DI diesel engine with exhaust gas recirculation

M. LOGANATHAN, A. VELMURUGAN, TOM PAGE, E. JAMES GUNASEKARAN, P. TAMILARASAN

《能源前沿（英文）》 2017年 第11卷 第4期   页码 568-574 doi: 10.1007/s11708-017-0461-y

摘要： The rapid depletion of fossil fuel and growing demand necessitates researchers to find alternative fuels which are clean and sustainable. The need for finding renewable, low cost and environmentally friendly fuel resources can never be understated. An efficient method of generation and storage of hydrogen will enable automotive manufacturers to introduce hydrogen fuelled engine in the market. In this paper, a conventional DI diesel engine was modified to operate as gas engine. The intake manifold of the engine was supplied with hydrogen along with recirculated exhaust gas and air. The injection rates of hydrogen were maintained at three levels with 2 L/min, 4 L/min, 6 L/min and 8 L/min and 10 L/min with an injection pressure of 2 bar. Many of the combustion parameters like heat release rate (HRR), ignition delay, combustion duration, rate of pressure rise (ROPR), cumulative heat release rate (CHR), and cyclic pressure fluctuations were measured. The HRR peak pressure decreased with the increase in EGR rate, while combustion duration increased with the EGR rate. The cyclic pressure variation also increased with the increase in EGR rate.

关键词： hydrogen     exhaust gas recirculation (EGR)     diesel     combustion     heat release rate (HRR)     combustion duration    

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Selective catalytic reduction of NOx from exhaust of lean-burn engine over Ag-Al2O3/cordierite catalyst

LI Junhua, KANG Shoufang, FU Lixin, HAO Jiming

《环境科学与工程前沿（英文）》 2007年 第1卷 第2期   页码 143-146 doi: 10.1007/s11783-007-0025-1

摘要： A highly effective Ag-AlO catalyst was prepared using the sol-gel method, and characterized by surface area using nitrogen adsorption, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The catalyst performance was tested on a real lean-burn gasoline engine. Only unburned hydrocarbons and carbon monoxide in the exhaust were directly used as reductant (without any external reductant), the maximum NO conversion could only reach 40% at 450?C. When an external reductant, ethanol was added, the average NO conversion was greater than 60%. At exhaust gas temperature range of 350 500?C, the maximum NO conversion reached about 90%. CO and HC could be efficiently oxidized with Pt-AO oxidation catalyst placed at the end of SCR converter. However, NO conversion drastically decreased because of the oxidation of some intermediates to NO again. The possible reaction mechanism was proposed as two typical processes, nitration, and reduction in HC-SCR over Ag-AlO.

关键词： lean-burn gasoline     external reductant     nitrogen adsorption     conversion     catalyst performance    

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Properties of La1-xCexCoO3 system perovskite-type catalysts for diesel engine exhaust removal

GONG Cairong, FAN Guoliang, HOU Yanfeng, ZHANG Zhongrong, SONG Chonglin, HUANG Qifei

《化学科学与工程前沿（英文）》 2007年 第1卷 第1期   页码 6-10 doi: 10.1007/s11705-007-0002-z

摘要： A series of complex oxide LaCeCoO catalysts was synthesized at a low temperature through a combustion process, in which x is among 0, 0.1, 0.2, 0.4 and 0.6 corresponding to the quantity of La partial substitution by Ce. The catalysts were characterized for phase composition using chemical analysis and X-ray diffraction. The catalytic activity of the catalysts in removal of NO, total hydrocarbon (THC) and particulate matter (PM) from diesel exhaust gases were examined in detail using temperature-programmed reaction technique. The results show that after partial substitution of La with Ce, the oxygen vacancy concentration increases significantly and a Co-Co system is formed. Consequently, the catalytic activity in the removal of THC and NO is significantly improved. But for the PM, the effect is not so obvious. The possible catalytic mechanism for this was presented. It is also worth noting that the doped catalysts showed good stability.

关键词： catalytic mechanism     combustion     corresponding     LaCeCoO     catalytic activity    

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A new prediction method of industrial atmospheric pollutant emission intensity based on pollutant emission

《环境科学与工程前沿（英文）》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1608-1

摘要：

● Established a quantification method of pollutant emission standard.

关键词： Industrial atmospheric pollutants     Pollutant emission standards     Quantitative method     Machine learning     Single enterprise    

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Dissolved methane in anaerobic effluent: Emission or recovery?

《环境科学与工程前沿（英文）》 2022年 第16卷 第4期 doi: 10.1007/s11783-022-1537-4

摘要： Various anaerobic processes have been explored for the energy-efficient treatment of municipal wastewater. However, dissolved methane in anaerobic effluent appears to be a barrier towards the energy and carbon neutrality of wastewater treatment. Although several dissolved methane recovery methods have been developed, their engineering feasibility and economic viability have not yet been assessed in a holistic manner. In this perspective, we thus intend to offer additional insights into the cost-benefit of dissolved methane recovery against its emission.

关键词： Anaerobic treatment     Municipal wastewater     Dissolved methane     Methane recovery     Carbon emission    

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Response of organic aerosol characteristics to emission reduction in Yangtze River Delta region

《环境科学与工程前沿（英文）》 2023年 第17卷 第9期 doi: 10.1007/s11783-023-1714-0

摘要：

● The emission reduction causes significant change in organic aerosol composition.

关键词： Emission control     Secondary organic aerosol     Atmospheric oxidizing capacity     Holiday effects     COVID-19 lockdown    

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标题 作者 时间 类型 操作

Transient emission simulation and optimization of turbocharged diesel engine

Lingge SUI, Zhongchang LIU, Yongqiang HAN, Jing TIAN

期刊论文

Performance and emission characteristics of QHCCI dimethyl ether engine

WANG Ying, LI Wei, ZHOU Longbao, LIU Shenghua, HU Tiegang

期刊论文

Performance and emission characteristics of a diesel engine operating on different water in diesel emulsion

Seyed Saeed HOSEINI, Mohammad Amin SOBATI

期刊论文

Identify the contribution of vehicle non-exhaust emissions: a single particle aerosol mass spectrometer

期刊论文

Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat

Yiji LU, Anthony Paul ROSKILLY, Long JIANG, Longfei CHEN, Xiaoli YU

期刊论文

Simulation and experiments on a solid sorption combined cooling and power system driven by the exhaust

Peng GAO, Liwei WANG, Ruzhu WANG, Yang YU

期刊论文

Effect of exhaust gas recirculation and ethyl hexyl nitrate additive on biodiesel fuelled diesel engine

K. VENKATESWARLU, B. S. R MURTHY, V. V. SUBBARAO, K. Vijaya KUMAR

期刊论文

Utilisation of waste heat from exhaust gases of drying process

Olga P. Arsenyeva,Lidija Čuček,Leonid L. Tovazhnyanskyy,Petro O. Kapustenko,Yana A. Savchenko,Sergey K. Kusakov,Oleksandr I. Matsegora

期刊论文

Exhaust hood for steam turbines-single-flow arrangement

Michal HOZNEDL , Ladislav TAJC , Jaroslav KREJCIK , Lukas BEDNAR , Kamil SEDLAK , Jiri LINHART ,

期刊论文

Combustion analysis of a hydrogen-diesel fuel operated DI diesel engine with exhaust gas recirculation

M. LOGANATHAN, A. VELMURUGAN, TOM PAGE, E. JAMES GUNASEKARAN, P. TAMILARASAN

期刊论文

Selective catalytic reduction of NOx from exhaust of lean-burn engine over Ag-Al2O3/cordierite catalyst

LI Junhua, KANG Shoufang, FU Lixin, HAO Jiming

期刊论文

Properties of La1-xCexCoO3 system perovskite-type catalysts for diesel engine exhaust removal

GONG Cairong, FAN Guoliang, HOU Yanfeng, ZHANG Zhongrong, SONG Chonglin, HUANG Qifei

期刊论文

A new prediction method of industrial atmospheric pollutant emission intensity based on pollutant emission

期刊论文

Dissolved methane in anaerobic effluent: Emission or recovery?

期刊论文

Response of organic aerosol characteristics to emission reduction in Yangtze River Delta region

期刊论文