In the current petrochemical market, global demand for aromatics, especially benzene, toluene, and xylenes (BTXs), has increased sharply. The methanol-to-aromatic conversion (MTA) over ZSM-5 is among most promising routes to satisfy this ever-growing demand. work, we show that high-pressure operation during MTA leads a large increase in aromatic selectivity while enhancing stability on-stream. ...

Effective mitigation of surface ozone pollution entails detailed knowledge the contributing precursors’ sources. We use GEOS-Chem adjoint model to analyze precursors in Beijing–Tianjin–Hebei area (BTH) China on days different severities June 2019. find that BTH heavily polluted is sensitive local emissions, as well emitted from provinces south (Shandong, Henan, and Jiangsu, collectively SHJ are...

This study focuses on the development of a hybrid biological reactor for treatment synthetic oilfield produced water. To face increasingly strict regulations concerning water discharge, fixed bed (FBHBR) containing combination free activated sludge and biofilm support was compared to conventional (CAS). After gradual microbial acclimation, 133-day experiment showed that both bioreactors were ab...

in order to evaluate the adsorption potential of multi-walled carbon nanotubes (mwcnts) for benzene, toluene and xylenes (btx), the adsorption capacities of benzene and toluene on two different mwcnts were measured using a gas-chromatography (gc) and then compared with each other. fourier transform infrared (ftir) was employed to investigate the presence of functional groups on the carbon nanot...

The objective of this study was to evaluate and obtain mathematical models, using the experimental design methodology, capable predicting contamination benzene, toluene, ethylbenzene xylenes (BTEX) in cases oil spillage at sea, acute toxicity soluble petroleum fraction (FSA). factorial planning developed describe concentration each compound according variables: °API, contact time oil/seawater a...

Ambient VOCs samples were collected at three locations (PolyU campus (PU), Kwun Tong (KT), Hok Tsui (HT)) in Hong Kong during the periods of November 2000-February 2001 and June 2001-August 2001. Also the concentrations of VOCs in Cross Harbor tunnel in Hong Kong were obtained in order to determine the vehicular sources of VOCs. Toluene was the most abundant VOC detected in Hong Kong. At the PU...

OBJECTIVES Low exposures to volatile aromatic hydrocarbons and cytogenetic effects in peripheral white blood cells were determined in 25 healthy workers employed in different areas of a styrene production plant in the former German Democratic Republic. The results were compared with 25 healthy unexposed controls (matched for age and sex) employed in the same company. METHODS The concentration...