Harnessing Ammonia as a Hydrogen Carrier for Integrated CO Capture and Reverse Water-Gas Shift.

In this paper, a concept of integrated CO capture and reverse water-gas shift (ICCrWGS) process was proposed using NH as the H carrier. The CO efficiency and total thermal energy consumption for the conventional rWGS, ICCrWGS using H (H-ICCrWGS) and NH (NH-ICCrWGS), were calculated. ICCrWGS using H and NH was conducted over the thermally stable Ni/CaZr dual-function materials (DFMs).

Single layered hollow NiO-NiS catalyst with large specific surface area and highly efficient visible-light-driven carbon dioxide conversion.

A sea urchin-shaped, single-layer, and hollow NiO-NiS photocatalyst with a large surface area was designed for carbon dioxide (CO) conversion in this study. A d-glucose polymeric hollow frame was fabricated using a d-glucose monomer, and NiO particles were stably grown on it using the hydrothermal method to form a hollow NiO surface. The d-glucose frame was removed by heat treatment to create hollowed NiO; hollowed NiO-NiS (h-NiO-NiS) was subsequently obtained through ion exchange between the O ions in NiO and S ions in the sulfur powder.

Characteristics of fractionated drop-in liquid fuel of plastic wastes from a commercial pyrolysis plant.

Pyrolysis is a waste conversion technology to solve an increasing plastic waste issue worldwide. Waste plastic pyrolysis fuel from a commercial-scale pyrolysis plant (10 ton/day) was comprehensively investigated using distillation methods by separating the crude pyrolysis fuel to isolate the diesel-like pyrolysis fuel fraction (C-C for fraction 2 + fraction 3, middle distillate). Other fractions were C-C for the light distillate (fraction 1), and >C for the heavy distillate (fraction 4).

Improvement of Oxygen Mobility with the Formation of Defects in the Crystal Structure of Red Mud as an Oxygen Carrier for Chemical Looping Combustion.

Fe₂O₃ is the major component of red mud, which is a by-produced after eluting aluminum from bauxite in the Bayer process, and can be used as an oxygen carrier. On the other hand, red mud is unsuitable for using oxygen in the crystal lattice because of its low surface area. In this study the red-mud sample was sulfidated at high temperatures to improve the lattice oxygen mobility by forming lattice defects in the iron oxide crystals.

Oxygen Transfer Capacity of Pseudobrookite Particles Derived from Ilmenite Mineral ( wt.%CuO/ wt.%red Mud- wt.%ilmenite).

The minerals have a somewhat slower than other transition metals at critical reduction rates in their ability to deliver oxygen. Thus, single minerals alone do not exhibit a higher oxygen transfer capacity than metal oxide oxygen carriers. In this study, we try to solve the problem of single mineral ilmenite (FeTiO₃) by combining it with Fe-based red mud and Cu oxide.

Effect of Manganese Oxide over Cu-Mn-Based Oxygen Carriers for Chemical Looping Combustion.

This study examined the effects of Mn on Cu-Mn-based mixed metal oxides used as oxygen transfer particles in the chemical looping combustion process. Chemical looping combustion of fuel is induced by the oxygen contained in the metal oxide. The oxidation reaction of the metal oxide particles reduced in the fuel reactor occurs in the air reactor.

Ni Substitution Effect on the Fe Position of Spinel Fe2MnO4 Particles for Chemical Looping Combustion.

The purpose of this study was to use a spinel structure to improve the performance and stability of chemical looping combustion processes. The oxygen carrier employed was Fe2MnO4, in which Ni was substituted at the Fe sites. Fe2-xNixMnO4 spinel particles were successfully synthesized by a sol-gel method.

Enhancement of CO2 sorption uptake on hydrotalcite by impregnation with K2CO3.

The awareness of symptoms of global warming and its seriousness urges the development of technologies to reduce greenhouse gas emissions. Carbon dioxide (CO(2)) is a representative greenhouse gas, and numerous methods to capture and storage CO(2) have been considered. Recently, the technology to remove high-temperature CO(2) by sorption has received lots of attention.