Preparation of High-Performance Zn-Based Catalysts Using Printing and Dyeing Wastewater and Petroleum Coke as a Carrier in Acetylene Acetoxylation

Abstract

In this study, novel Zn catalysts were prepared by the wet impregnation method using printing and dyeing wastewater (PDW)-modified petroleum coke (petcoke) as a carrier, and they were applied to the acetylene acetoxylation. The pretreated petroleum coke has a high specific surface area which provides sufficient space for the loading of Zn. Calcination further increases catalyst activity, but when calcination temperatures exceed 1000 °C, a significant loss of Zn occurs, resulting in a dramatic decrease in catalyst activity. This enables the conversion of acetic acid up to 85%. X-ray photoelectron spectroscopy confirmed that a large amount of N is introduced into PC from PDW, which changes the electron transfer around Zn. Temperature-programmed desorption (TPD) analysis revealed that the nitrogen-doped Zn(OAc)2 catalyst enhanced the catalytic activity by modulating the intensity of the catalyzed adsorption of acetic acid and acetylene. This study provides a new way to reuse petroleum coke and printing and dyeing wastewater to support the sustainable development of the vinyl acetate industry.

Application of Liquidus Projections in SiO2–Al2O3–CaO Systems with Fe2O3 and V2O5 to Study the Dissolution of Alumina Crucibles in Gasification Slags Containing Vanadium

“…Petroleum coke (or petcoke) is a byproduct of petroleum refineries. The global production of petcoke has reached 150 million metric tons per year and is expected to increase in the future . Using petcoke in gasifiers is an effective way to convert it to value-added products.…”

“…The global production of petcoke has reached 150 million metric tons per year and is expected to increase in the future. 2 Using petcoke in gasifiers is an effective way to convert it to value-added products. It has a 20% higher heating value than coal and only 0.1–0.3 wt % ash content compared to that of 8–20 wt % in coal.…”