Wu Han

Bio: Wu Han is an academic researcher from Shandong University. The author has contributed to research in topics: Raw material & Condenser (heat transfer). The author has an hindex of 2, co-authored 9 publications receiving 60 citations.

Method for performing resource utilization on garbage incineration fly ash and industrial solid waste

Abstract: The invention relates to a method for performing resource utilization on garbage incineration fly ash and industrial solid waste. The method comprises the following steps: 1) performing pretreatment on the garbage incineration fly ash: mixing the garbage incineration fly ash and water, repeatedly washing the garbage incineration fly ash for three times, performing magnetic stirring while washing,filtering after washing, obtaining wet fly ash after filtering, drying at 100 DEG C for 2 hours and grinding the dried product for future use; 2) preparing raw material balls from raw materials such as fly ash, desulfurized gypsum and aluminum ash which are pretreated in the step 1), calcining, and cooling at room temperature to obtain clinker; and 3) crushing, grinding and sieving the calcined clinker in the step 2), and adding the gypsum to obtain a sulfur aluminate cementing material. By the method, the garbage incineration fly ash can be treated completely and the problem of secondary pollution caused by treatment on the garbage incineration fly ash is effectively avoided.

Sulfate aluminate cement based 3D printing material and preparation method thereof

Abstract: The invention discloses a sulfate aluminate cement based 3D printing material and a preparation method thereof. The 3D printing material comprises following raw materials in percentage by weight: 45 to 50% of sulfate aluminate cement; 45 to 50% of fine aggregate; 0 to 1% of a water reducer; 0 to 0.08% of a retarder; 0 to 0.2% of cellulose ether; 0.5 to 2% of redispersible latex powder; 0.001 to 0.002% of an antifoaming agent; and 0.1% to 0.3% of fibers; wherein the total percentage by weight of all raw materials is not greater than 100%. The provided 3D printing material has an excellent rheological property and self-curing performance; is matched with a 3D printing technology at the same time, has excellent mechanical properties on the premise that the weight of the 3D printing material is reduced, when being taken as a wall material, and can be used to construct composite structures of buildings.

Device and method for decomposing liquid chemical weapon under microwave radiation

Abstract: The invention relates to a device and method for decomposing a liquid chemical weapon under microwave radiation. The device comprises a gas bottle, an automatic injection device, a reactor and a microwave generation device. Carrier gas and a toxicant enter the reactor through the gas bottle and the automatic injection device respectively, the reactor comprises a top cover, a stirring rod, a discharger and a pad block, and the top cover is located on the upper portion of the reactor; the top of the stirring rod is fixedly connected with the bottom of the top cover, the discharger is composed ofa supporting base and multiple discharging metal wires, and the upper side of the supporting base is fixedly connected with one end of each discharging metal wire; the discharging metal wires are vertically placed, the base is located at the bottom of the reactor, and the discharger is located on the base; the supporting base is located on the upper surface of the base, and one end of the microwave generation device is located below the base. The discharger is located in the center of the base, and the other end of each discharging metal wire points to the center of the bottom of the stirringrod. Under the cooperation effect of microwaves and metal discharging, the toxicant is subjected to pyrolysis and oxidized, and the aim of treating toxicant liquid is achieved.

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

Abstract: In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.

Photocatalytic Z-Scheme Overall Water Splitting: Recent Advances in Theory and Experiments.

Abstract: Photocatalytic water splitting is considered one of the most important and appealing approaches for the production of green H2 to address the global energy demand. The utmost possible form of artificial photosynthesis is a two-step photoexcitation known as "Z-scheme", which mimics the natural photosystem. This process solely relies on the effective coupling and suitable band positions of semiconductors (SCs) and redox mediators for the purpose to catalyze the surface chemical reactions and significantly deter the backward reaction. In recent years, the Z-scheme strategies and their key role have been studied progressively through experimental approaches. In addition, theoretical studies based on density functional theory have provided detailed insight into the mechanistic aspects of some breathtakingly complex problems associated with hydrogen evolution reaction and oxygen evolution reaction. In this context, this critical review gives an overview of the fundamentals of Z-scheme photocatalysis, including both theoretical and experimental advancements in the field of photocatalytic water splitting, and suggests future perspectives.