Keynote Speaker

Prof.Jiang Wu, Shanghai University of Electric Power, China 

Title: Progress in photocatalytic technology and its application in flue gas emission controls
Abstract: The emission control regulation of pollutants from coal-fired power plant flue gas are more and more strict. The industrial pollution mainly includes organic pollutants (VOCs, POPs etc.), inorganic pollutants (NOX, SOX, dusts etc.) and hazardous heavy metal pollutant (mercury, arsenic, selenium and lead etc.). The research of power plant flue gas purification has become one of the hottest topics. In the flue gas pollutants emission reduction technology, the flue gas dust removal technology is developed from electrostatic precipitation and bag dust collection, to the electrostatics fabric filter, wet dust removal, low-low temperature electrostatic precipitator and agglomeration technology. Activated carbon injection is a more mature technology for removal of heavy metal mercury in the flue gas, but its cost is high. In recent years, catalysis and other flue gas mercury removal technology has been developed, and a series of results have been obtained.

Photocatalytic technology is green, high efficiency, cheap and no secondary pollution and is widely used in energy conversion and pollution control fields. Due to the suitability of the cost and no additional implementation of site requirements, the development and application of photocatalytic technology, a promising technology of various pollutants, are the development direction of the power plant exhaust purification, which provides technical support for the realization of the near-zero emission standard.

A series of photocatalysts, such as titanium-based photocatalysts, bismuth-based photocatalysts and precious metal oxide etc.. In our previous study, we fabricated more photocatalysts successfully with several methods, such as calcination, hydrothermal, solvothermal, chemical vapor transport, oil bath, phase-transfer assisted reaction, solvent-exfoliation and so on. The bismuth-based photocatalysts was precisely controlled through the bad gap engineering, and the dimension of photocatalyst was reconstructed by structural engineering. Based on the band gap engineering, the electric field of photocatalyst strength is effectively strengthened, and thereby photocatalysts is modified in the longitudinal and lateral directions to improve the carrier separation efficiency. The photocatalytic removal experiment and mechanism of simulated flue gas elemental mercury were carried out on the developed high activity catalyst. The study shows that the bandgap engineering successfully shortens the wide band gap bismuth-based photocatalyst by doping the impurity level. The research aimed at flue gas pollutants removal technology. It greatly improves the removal and purification effect of flue gas heavy metal, and also has good removal effect on nitrogen oxides and sulfur oxides, and achieves joint removal of various pollutants. The photocatalytic technology can be used for flue gas purification of coal-fired power stations, and is also applicable to coal-fired industries such as cement, chemical industry, metallurgy, etc.. It is of great benefit to solve serious problems of flue gas pollution, and has high economic and social value.

Dr.Rohitha Weerasinghe, University of the West of England, England

Title: Computational Modelling and Testing of Combustion Process in Biogas Stoves
Abstract: Nearly half of the world population who live in the less developed countries use 90 % of their energy for cooking. Much of this energy is coming from sources other than petroleum products, but mainly from biomass. The supply of biomass is outweighed by the demand. Hence, and for environmental sustainability, the cooking process has to be made more efficient. The present work looks at the cooking process in general and attempts to use computational modelling for making cooking more efficient. Two cases in a rural context are presented where a biogas burner is simulated to analyse combustion and make the process more efficient and where a wood fired cooking stove has been computationally modelled. The principal heat release model for the simulation is based upon the eddy break-up concept in which fast chemistry is assumed in the combustion of biogas in the stove. Hence the turbulent mixing rate is controlled according to the turbulence time scale k/e. Results are shown for both the flame only, and the flame with the stove and top plate. The temperature and velocity profiles around the burner are shown.
The study has shown ways in which the efficiency of the cooking process can be increased. They include: metering the fuel, achieving a hot burn (above 1,200 degrees F.), assuring a good mix of gas and air and flame, limiting the cooling effect of air on the fire, preheating the air that aids combustion and so on. A combination of these design considerations can result in combustion efficiencies of over 90% in cooking.

Prof. Mingchuan Zhang, 
School of Mechanical Enginering, Shanghai Jiao Tong University, China

Title: Modeling for Some Meso-scale Phenomena in Pulverized Coal Combustion and Fast Fluidization
Abstract: It is very often for people to face various complex multi-phase reacting flow problems in simulation of large power generation systems and development of new energy conversion processes. The scales of the related phenomena can be different with each other for several orders of magnitude. Compared with the macroscopic and microscopic phenomena, the meso-scale ones are often less investigated and more difficult to model. However, they are often the crucial steps for complete modeling of these cross-scale engineering problems. Modeling of two different types of meso-scale phenomena will be presented and discussed.
The first one is a classical issue for pulverized coal combustion, i.e. whether the primary product of surface oxidation, CO, burns further in the boundary layer of the particle, i.e. a static meso-scale phenomenon. And how this boundary layer phenomenon is influenced by the turbulent flow in the furnace? i.e. a dynamic meso-scale problem. The moving flame front model developed for modeling the stagnant boundary layer reactions, and the binary Mont-Carlo approach for modeling the interactions between the stagnant boundary layer and the turbulent eddies will be reported for this subject.

The second subject is related with development of the chemical looping combustion and the dual fluidized bed gasifier, with which the fast fluidization provides the possibility of great solids flux exchange between different reactors. A newly developed type-A-choking-oriented unified model for fast fluidization dynamics will be reported, in which the meso-scale interactions between the continuous upward dilute flow and the discrete downward dense clusters will be introduced.

Prof. Indra Prabh Jain, University of Rajasthan, India

Title: Hydrogen the Fuel for 21st Century
Abstract: Non-Conventional Energy Sources, such as solar and hydrogen energy will remain available for infinite period. One of the reasons of great worry for all of us is reducing sources of conventional energy. We are consuming more energy than can be produced by nature. The results will be elimination of all the conventional sources of energy from the world most probably in this century itself. The other aspect is pollution added by these sources in our environment. The more we use these sources the poorer is our quality of life on this planet.
One of the frequently discussed candidates is hydrogen which when burnt in air produces a clean form of energy. In the last one decade hydrogen has attracted worldwide interest as a secondary energy carrier. This has generated comprehensive investigations on the technology involved and how to solve the problems of production, storage and applications of hydrogen. The interest in hydrogen as energy of the future is due to it being a clean energy, most abundant element in the universe, the lightest fuel, richest in energy per unit mass, produced easily using any source of energy and unlike electricity, it can be easily stored. Hydrogen gas is now considered to be the most promising fuel of the future.  It will provide, Cheap Electricity, Cook Food, Drive Car, Run Factories, Jet Planes, Hydrogen Village and for all our domestic energy requirements.
Hydrogen Energy Systems is making inroads in several directions. All the major car companies are manufacturing hydrogen fuel automobiles. Some cities have started demonstration projects using Hydrogen fuel transit buses. Long lasting, light and clean metal hydride batteries are already commercial for laptop computers. Larger capacity batteries are being developed for electrical cars. Hydrogen is already being used as the fuel of choice for space programmes around the world. It will be used to power aerospace transports to build the international space station, as well as to provide electricity and portable water for its inhabitants.
In short hydrogen shows the solution and also allows the progressive and non-traumatic transition of today’s energy sources, towards feasible safe reliable and complete sustainable energy chains. The present article deals with the storage, application and characterization aspect of hydrogen in the present energy scenario.
There are sufficient environmental and public health benefits of direct hydrogen fuel to justify moving ahead based on what we know already about fossil fuels, their consequences and their limitations. The coming decade will definitely see greater and greater use of “Green Power” so as to ensure less dependence on ‘Fossil Fuels’ and also in order to prevent environmental degradation.

Prof. Dr. Li Yang, College of Architecture & Urban Planning, Tongji University, China

Title: Generalized Building Energy Efficiency and New Energy Utilization
Abstract: The development of human society is a non-stop gear, and the way we use energy is about the future. How to use resources reasonably and effectively is the pressure we face. The increase in population is the problem of resource allocation—insufficient inventory of traditional energy sources. Economic development is a double-sided blade, and ecological environmental protection is our focus. Research and development of new energy and renewable energy is a way to block dependence on traditional energy sources.  The broad definition of building energy conservation is proposed, and the significance of using new energy to building energy conservation is expanded from the perspective of macro environment, including the use of integrated energy, solar energy, and energy islands to achieve zero energy consumption in building energy conservation. The construction has effectively promoted the development of zero energy consumption in terms of the life cycle and environmental protection.

Invited Speaker

Prof./Dr. Zhimin Qiang, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, China

Title: Effective abatement of pesticides in drinking water treatment plants with an advanced treatment process: A one-year field investigation in Shanghai, China
Abstract: The benefits of global pesticide use come at the cost of their widespread occurrence in the aquatic environment, which will inevitably enter drinking water treatment plants (DTWPs) and pose human exposure. This study investigated the occurrence and removal of 29 pesticides in 4 DTWPs with conventional and advanced treatment processes (i.e., ozone + biological activated carbon (BAC), or ultrafiltration) in Shanghai, China from 2018 to 2019. The concentration levels of target pesticides in the raw water of 4 DWTPs ranged from below the limit of quantification (< LOQ) to 2391.3 ng L-1, whereas significantly decreased to a range of < LOQ to 269 ng L-1 in the finished water, with an average concentration of 4.7 ng L-1. The application of an advanced treatment process could effectively reduce the pesticide levels. For example, the highest removal of isocarbophos after the advanced treatment process reached 94.6%, whereas its removal after the traditional treatment processes was only 42.6%. Although the total organic carbon level after ozonation kept unchanged, the pesticide concentrations decreased obviously. A low ambient temperature in winter weakened the removal of target pesticides in the BAC process because of an inhibited microbial activity. The ultrafiltration process also enhanced the removal of target pesticides. The estimated daily intake (EDI) level of target pesticides in the finished water could be reduced by 67% if combining the conventional and advanced treatment processes. All EDI levels of the infant group were much higher than those of the adult and juvenile groups. The synergistic toxic effects of multiple pesticides in drinking water on human health warrants further research.