Showing 11 - 20 of 35
A theoretical method is developed to analyze carbon dioxide capture by a stationary single droplet for evaluating the fundamental mass transfer behavior. In the method, the gas-phase diffusion is predicted using a similarity method and the technique of separation of variable is employed to...
Persistent link: https://www.econbiz.de/10010702622
Concentration polarization, a retarding effect upon hydrogen permeation across a membrane, will affect the performance of hydrogen separation. To recognize the concentration polarization behavior of hydrogen-rich gas in high-permeance membrane tubes, three palladium-based membranes with two pure...
Persistent link: https://www.econbiz.de/10010718884
Transient mass transfer processes of hydrogen permeating through a Pd membrane are modeled to aid in predicting the hydrogen transport behavior. The model is established in terms of the quasi-steady time and the steady permeation rate. Meanwhile, four important parameters are considered; they are...
Persistent link: https://www.econbiz.de/10008916273
Disruption of lignocellulosic structure of biomass plays a key role in producing bioethanol from lignocelluloses. This study investigated the impact of dilute sulfuric acid pretreatment on bagasse structure using microwave heating. Three reaction temperatures of 130, 160 and 190 °C with...
Persistent link: https://www.econbiz.de/10008918809
Torrefaction is a thermal pretreatment process for biomass where raw biomass is heated in the temperatures of 200–300 °C under an inert or nitrogen atmosphere. The main constituents contained in biomass include hemicellulose, cellulose and lignin; therefore, the thermal decomposition...
Persistent link: https://www.econbiz.de/10011053089
Thermoelectric (TE) devices can provide clean energy conversion and are environmentally friendly; however, little research has been published on the optimal design of air-cooling systems for thermoelectric generators (TEGs). The present study investigates the performance of a TEG combined with...
Persistent link: https://www.econbiz.de/10011053296
Commercially available thermoelectric modules are useful devices to recover low-temperature waste heat for power generation. To understand the characteristics of power generation from thermoelectric modules (TEMs), the performances of TEMs at various flow patterns, heating temperatures, flow...
Persistent link: https://www.econbiz.de/10011053662
Carbon dioxide capture by a droplet plays a fundamental role for reducing atmospheric greenhouse effect stemming from anthropogenic activities. To recognize the CO2 capture dynamics by a quiescent water droplet, a theoretical analysis on the mass transfer of CO2 from the gas phase to the liquid...
Persistent link: https://www.econbiz.de/10011053813
Torrefaction processes of four kinds of biomass materials, including bamboo, willow, coconut shell and wood (Ficus benjamina L.), were investigated using the thermogravimetric analysis (TGA). Particular emphasis is placed on the impact of torrefaction on hemicellulose, cellulose and lignin...
Persistent link: https://www.econbiz.de/10011054156
The purpose of this study is to investigate the torrefaction behavior of woody biomass (Lauan) blocks and its influence on the properties of the wood. Three different torrefaction temperatures of 220, 250 and 280 °C, corresponding to light, mild and severe torrefactions, and four torrefaction...
Persistent link: https://www.econbiz.de/10011054457