The Effects of Physical-Chemical Evolution of High-Sulfur Petroleum Coke on Hg Removal from Coal-Fired Flue Gas and Exploration of Its Micro-Scale Mechanism.

As the solid waste by-product from the delayed coking process, high-sulfur petroleum coke (HSPC), which is hardly used for green utilization, becomes a promising raw material for Hg removal from coal-fired flue gas. The effects of the physical-chemical evolution of HSPC on Hg removal are discussed. The improved micropores created by pyrolysis and KOH activation could lead to over 50% of Hg removal efficiency with the loss of inherent sulfur.

Understanding the effect of thiophene sulfur on brominated petroleum coke for elemental mercury capture from flue gases.

Developing highly efficient and inexpensive adsorbent is a critical technology for elemental Hg removal from the coal combustion flue gases worldwide. Here, we present a novel approach that a waste by-product of petroleum coke containing organic sulfur enhanced bromine binding during the bromine modification process and the brominated petroleum coke increased its mercury adsorption. Experiments and density functional theory reveal that the mercury adsorption capacity directly correlated with the surface organic sulfur and the binding bromine content.

Removal of Hg from simulated flue gas over silver-loaded rice husk gasification char.

Mercury released into the atmosphere from coal combustion is harmful to humans and the environment. Rice husk gasification char (RHGC) is an industrial waste of biomass gasification power generation, which is silver-loaded to develop a novel and efficient sorbent for mercury removal from simulated flue gas. The experiment was carried out in a fixed-bed experimental system.

Bromination of petroleum coke for elemental mercury capture.

Activated carbon injection has been proven to be an effective control technology of mercury emission from coal-fired power plants. Petroleum coke is a waste by-product of petroleum refining with large quantities readily available around the world. Due to its high inherent sulfur content, petroleum coke is an attractive raw material for developing mercury capture sorbent, converting a waste material to a value-added product of important environmental applications.