China Telecom clears the way for strategy transformation

The comprehensive pilot of China Telecom transformation was unveiled in Pudong of Shanghai a few days ago, which indicates comprehensive pilot projects starting formally. Huang WenLin, Vice President of China Telecom, attends the unveiling ceremony and proposes four requirements.

Technical alternatives for coke oven gas utilization in China: A comparative analysis of environment-economic-strategic perspectives

China is the largest coke producer and consumer.There is a pressing need to address the high emissions of air pollutants and carbon dioxide associated with traditional coking production.As the nation pursues a transition towards carbon neutrality,expanding supply chains for coking plants to produce hydrogen,methanol,and other green alternatives has garnered significant attention.However,the relative advantages of these strategies have remained uncertain.In this study,we integrate a life cycle assessmenteconomic analysis-scenario analysis model to evaluate various coke oven gas(COG)utilization routes(COGtM:COG-to-methanol,COGtLNG:COG-to-liquefied natural gas,COGtSA:COG-to-synthetic ammonia,and COGtH:COG-to-hydrogen).The results indicate that COGtSA emerges as the preferred option for balancing environmental and economic benefits.Meanwhile,COGtM demonstrates economic viability but is associated with higher environmental impacts.Despite being recognized as a significant strategic direction under carbon neutrality initiatives,COGtH faces economic feasibility and risk resilience limitations.COGtLNG encounters both financial and environmental challenges,necessitating strategic development from an energy security perspective.The projected coking capacity is anticipated to experience a slight increase in the mid-term yet a significant decline in the long term,influenced by steel production capacity.In potential future markets,COGtM is estimated to potentially capture a maximum market share of 16e34%in the methanol market.Furthermore,against the backdrop of continuously expanding potential demand for hydrogen,COGtH holds advantages as a transitional solution,but in the long run,it can only meet a small portion of the market.COGtSA can meet 7e14%of market demand and emerges as the most viable pathway from the viewpoint of balancing environmental and economic aspects and covering future markets.

Construction of a Three-dimensional Covalent Organic Framework via the Linker Exchange Strategy

Covalent organic framework(COF)is a porous crystalline material with a well-controlled structure and a wide range of potential applications.However,the construction of new COF faces huge challenges,including the design and synthesis of structural unit monomers,the choice of reaction solvent system,and the study of reaction time and temperature.So,it’s particularly important to widen the application scope of synthetic methods and further promote the development of COFs.Here,we performed structural transformations in a three-dimensional(3D)COF(COF-300),and Fourier transform infrared spectroscopy(FTIR),power X-ray diffraction analysis(PXRD)and nitrogen adsorption isotherms confirmed the chemical principles and the successful realization of these exchanges.At the same time,we found that the interpenetrating structure in 3D COF can be changed through the conversion of linkers.The structure simulation successfully proved the transformation of COF from five-fold to seven-fold interpenetration.In addition,in order to prove the versatility of this strategy,we used the same method to convert COF-300 into a high crystallinity 3D COF(TJNU-COF-302)that is also seven-fold interpenetrating and has not been reported.This simple strategy not only makes it easy to obtain a 3D COF connected with imines,which greatly promotes the development of COF,but also provides a new way to develop 3D COFs with complex interpenetrating structures.