Research on Activation Mechanisms In Situ during Rapid Desorption of Mercury-Absorbing Activated Coke by the Heating Method.

The adsorption of active coke is a good method to control mercury in coal-fired power plants, but spent powdered activated coke (SPAC) will cause secondary pollution and waste of resources if it is not properly treated. The purpose of this study was to explore the desorption performance of SPAC when heated in a drop-tube reactor under different atmospheres. The carbon consumption was 0.

Syntheses, structures and characterization of noncentrosymmetric MZnPO (M = K, NH).

Two phosphates, KZnPO and NHZnPO, were successfully synthesized using a solid-state reaction method and characterized single-crystal X-ray diffraction. Both of their structures feature a three-way skeleton composed of isolated PO and ZnO tetrahedra, with K/NH cations occupying the spaces within the frameworks to balance charges. These compounds are isostructural and crystallize in the noncentrosymmetric 6 space group.

Discovery of a new bimetallic borate with strong optical anisotropy activated by π-conjugated [BO] units.

Birefringent materials with high optical anisotropy have been identified as a research hotspot owing to their significant scientific and technological significance in modern optoelectronics for manipulating light polarization. Researchers studying borate systems have discovered that adding π-conjugated units placed in parallel can significantly increase the birefringence of crystalline solids; some examples include [BO] units, [BO] units, and [BO] units. However, there are not many borates with strictly parallel configurations of π-conjugated [BO] units.

RbMgBO and LiBaAl(BO): covalent tetrahedra MO-containing borates with deep-ultraviolet cutoff edges.

Borates are favored by materials scientists and chemists because of the significant electronegativity difference between B and O atoms and their flexible assembly modes resulting in abundant structures and excellent properties. For the design of deep-ultraviolet (DUV) optical crystals with excellent macroscopic performance, it is crucial to choose appropriate cations and anionic groups and microscopically reasonable assembly patterns. Herein, by introducing covalent tetrahedra ([MO], M = Mg, Al), two new mixed alkali metal and alkaline earth metal borates, RbMgBO and LiBaAl(BO), were synthesized using the melt method and high-temperature solution method.

Investigation on mercury removal and recovery based on enhanced adsorption by activated coke.

This work is to systematically study the mercury-removal behavior of activated coke (AC), regeneration of spent AC by microwave treatment and subsequent recycling of Hg. The powdery (AC) was obtained under coal-fired hot gas conditions in a drop-tube reactor. The adsorption mechanism and capacity of the AC for Hg removal in a HO + SO + O atmosphere were investigated.

Rational Design via Synergistic Combination Leads to an Outstanding Deep-Ultraviolet Birefringent LiNaBO Material with an Unvalued BO Functional Gene.

Birefringent materials, the key components in modulating the polarization of light, are of great importance in optical communication and the laser industry. Limited by their transparency range, few birefringent materials can be practically used in the deep ultraviolet (DUV, λ < 200 nm) region. Different from the traditional BO- or BO-based DUV birefringent crystals, we propose a new functional gene, the BO unit, for designing birefringent materials.

Versatile Coordination Mode of LiNaB8O13 and α- and β-LiKB8O13 via the Flexible Assembly of Four-Connected B5O10 and B3O7 Groups.

Three new alkali-metal mixed borates, LiNaB8O13, α-LiKB8O13, and β-LiKB8O13, containing a (3)∞[B8O13] three-dimensional network have been successfully synthesized. Their fundamental building block is [B8O16](8-) formed by the vertex-sharing [B5O10](5-) and [B3O7](5-) groups, which are topologically identical when they are considered as four-connected nodes. The viewpoints give us a feasible way to investigate the versatile structure assembly of borates with a complex network.