Mixed agricultural residue, inoculated with aerobic sulfide oxidizing microbial consortium, was used as biofilter media to study the removal efficiency (,R) of hydrogen sulfide (H2S). The effect of humidification and inlet H2S volume fraction on the performance of biofilter was also investigated. A 3.9 l bench scale biofilter was continuously operated to treat air containing H2S gas in the rang...

An NREL-designed vortex reactor fast pyrolysis process development unit (PDU) has been used to investigate hot gas filtration of biomass pyrolysis vapors. Most of the experimental work employed a conventional baghouse type of filter that used NEXTELTM ceramic cloth filter bags as the filter medium. A series of experimental runs demonstrated that hot gas filtered biocrude oils having less than 1...

In this review paper we showcase recent activities on silicon photonics science and technology research in Hong Kong regarding two important topical areas — microresonator devices and optical nonlinearities. Our work on silicon microresonator filters, switches and modulators have shown promise for the nascent development of on-chip optoelectronic signal processing systems, while our studies on ...

One of the problems modern world is air pollution by harmful substances contained in exhaust gases cars. To solve this problem, diesel, and gasoline porous particulate filters are used. However, it necessary that filter create a minimum pressure drop while maintaining high filtering capacity. The purpose study to identify feasibility discrete arrangement reduce drop. In work, we carried out det...

We investigate structured arrays and rings in elasticity to design elastic platonic circuits that utilise resonant phenomena. Creating ring resonators, understanding their coupling input output arrays, allows for the development of including add–drop filters (ADFs) coupled resonator (CREAs), hence we envisage integrated devices. Structured point-masses placed atop a thin plate lead highly confi...

We have designed a tunable, oblique-incidence resonant grating filter that covers the C band as an add-drop device for incident TE-polarized light. We tune the filter by tilting a microelectromechanical systems platform onto which the filter is attached. The fabrication tolerances as well as the role of finite incident-beam size and limited device size were addressed. The maximum achievable eff...

This work is based on the development of a stacked AISI 304 stainless steel wire meshes structure with oxidizing and filtering capacity, where Co Ce oxide catalysts were deposited surface metallic fibres as novel alternative to current DOC – DPF system. The system was scaled up encouraged by results obtained at lab scale, going from 16 mm filter diameter 130 mm. coated inside case in order conf...

Nano materials possess unique mechanical, physical, and chemical properties. They are small, and have an ultrahigh surface area, making them suitable for air filter applications since air filtration is necessary to protect sensitive components from harmful particulates and gaseous contaminants. The electrospinning method has been recognized as an efficient technique for fabricating polymer nano...

We demonstrate that the performance of a periodically poled LiNbO3- (PPLN-) based electro-optic Solc filter is dependent on the duty cycle of the crystal. This may limit the performance of the device for applications such as add-drop filtering and switching, owing to the deterioration of the extinction ratio. It is shown that by adding a retarder to the Solc filter it is possible to improve the...