The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The effects of Ni promoter on Mo-S/CNT catalyst towards hydrodesulfurization (HDS) and hydrogen evolution reactions (HER) were studied. Ni promoter was introduced into Mo-S/CNT catalyst by one-step or mechanical mixing method, and Ni species presented in the form of Ni-Mo-S or Ni3S4, respectively. Catalytic assessments indicated that Ni-Mo-S structure had obviously better HDS and HER activities than...
Oil adsorption on the pore surface of tight shale affects the transport and even recovery of oil through shale reservoir. In this paper, an innovative model evaluating the n-alkane adsorption on shale was developed theoretically according to the hydrocarbon vapor adsorption (HVA) process and was verified by the n-decane (i.e., n-C10) adsorption on continental oil shale obtained from the Dongying sag...
Coal water slurry (CWS) with high solid content and low viscosity can allow for efficient and environmentally friendly gasification. In the process of CWS preparation, water will enter pores of coal particle to form inner water, resulting in a decrease in free water among particles and an increase in viscosity. However, pre-absorption of moisture from air was found to result in a sharp decrease of...
In order to enhance the catalytic activity for elemental mercury (Hg0) oxidation without the aid of HCl, CeO2 was added into the support to modify V2O5–WO3/TiO2 catalysts. The performance of V2O5–WO3/TiO2–CeO2 (VWTiCe) catalysts on Hg0 oxidation as well as the catalytic mechanism was also studied. The catalysts were characterized by BET, XRD and XPS techniques. The results showed that the performance...
There is increasing need for tighter controls of coal-fired plants due to more stringent regulations and addition of more renewable sources in the electricity grid. Achieving this will require better process knowledge which can be facilitated through the use of plant models. Drum-boilers, a key component of coal-fired subcritical power plants, have complicated characteristics and require highly complex...
This paper presents a study of modelling post-combustion CO 2 capture process using bootstrap aggregated neural networks. The neural network models predict CO 2 capture rate and CO 2 capture level using the following variables as model inputs: inlet flue gas flow rate, CO 2 concentration in inlet flue gas, pressure of flue gas, temperature of flue gas, lean solvent...
The hydrogasification of a low-rank coal was carried out in a two-stage fixed bed reactor with a focus on the separate effects of hydrocracking temperature, hydrogen pressure and vapor residence time on the formations of gaseous and liquid products, particularly the oxygen-containing products. While the yields of CH4 increased with the increase of hydrocracking temperature (500–750°C) and hydrogen...
The utilization of oily sludge produced from refinery processes was evaluated in this study. Oily sludge was added to coal–water slurry (CWS) in different ways to prepare desirable coal–oily-sludge slurry (COSS). The slurryability and rheological characteristics of COSS were investigated and compared to CWS. The viscosity and yield stress of COSS sharply decrease with increasing the addition of oily...
A milli-fixed bed reactor was employed to investigate the kinetics of CO hydrogenation reaction over a commercial nickel catalyst. The experimental studies were carried out under industrially relevant conditions of low temperature methanation of biomass derived syngas: at the temperature range 250–360°C, various H 2 /CO feed ratio, in the presence of CO 2 and steam. The catalyst exhibited...
Biodiesel is an alternative fuel with growing usage in the transportation sector. To compare biodiesel and petroleum diesel effects on particle emissions, engine dynamometer tests were performed on a Euro II engine with three test fuels: petroleum diesel (D), biodiesel made from soy bean oil (BS) and biodiesel made from waste cooking oil (BW). PM 2.5 samples were collected on Teflon and quartz...
To study the effects of fuel sulfur content on the characteristics of diesel particle emitted from a typical engine used in China, two types of diesel fuel with sulfur content of 30ppm and 500ppm were used in this engine dynamometer test under six operation conditions corresponding to 20%, 50% and 80% load at 1400rpm and 2300rpm engine speeds, respectively. Gaseous pollutants and particulate matter...
Industrial experiments have been performed on a down-fired pulverized-coal 300MWe utility boiler with vent air valve opening of 100% and 40%. The gas temperature distribution along the primary air and coal mixture flow, gas temperature distribution in the furnace, and gas components such as O 2 , CO, CO 2 and NO x in the near-wall region were measured for the first time. The...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.