China Academy of Safety Sciences and Technology

Metal-Dependent Control of Methoxy Retention versus Cleavage in Electrocatalytic Hydrogenation of Lignin-Derived Aromatics

Abstract Electrochemical hydrogenation of lignin-derived aromatics offers a route to biomass upgrading, but controlling methoxy retention versus cleavage remains challenging. Here, we compare carbon-supported Rh, Pt, Ru, and Pd catalysts for guaiacol conversion under identical co...

Experimental investigation of hydrogen leakage dispersion characteristics in a scaled hydrogen refueling area

Unexpected leakage experiments were conducted using a 1:20 scale hydrogen refueling area model incorporating the actual equipment layout. The effects of leakage duration, direction, and flow rate on concentration distribution were investigated. Three concentration stages were ide...

Inhibition Mechanisms of Lithium-Ion Battery Deflagration by the Free Space and Aerogel Wall Surface Inside an Explosion-Proof Power Enclosure

Abstract Deflagration of lithium-ion battery thermal runaway (TR) products poses a safety challenge for explosion-proof power enclosures in underground coal mines. In this study, sealed-chamber experiments and chemical kinetic simulations were combined to investigate the effects...

Scale-Dependent Transition from Single Fracture Interaction to Fracture Network Evolution during Supercritical CO2 Fracturing of Naturally Fractured Shale

Abstract Supercritical CO2 (ScCO2) fracturing is a promising method for shale gas stimulation because it can reduce water consumption and provide a potential route for CO2 utilization. In naturally fractured shale, stimulation performance is controlled not only by the extension o...

Polarized light and size control in modulating the photothermal performance of titanium nitride nanobipyramid

Plasmonic nanostructures have received considerable attention for solar photothermal conversion due to their strong light absorption and efficient heat generation. However, conventional noble-metal plasmonic materials suffer from high cost, limited thermal stability, and inadequa...

Numerical Investigation of LPG Leakage Dispersion and Explosion Consequences in a Spherical Tank with Safety Walls

Abstract Liquefied petroleum gas (LPG) leakage from spherical tanks can generate near-ground flammable vapor clouds and subsequent fire and explosion hazards. A three-dimensional FLACS model of a 1000 m3 LPG spherical tank was established to investigate the effects of safety-wall...

Acoustic and mechanical responses of coal subjected to dry–wet cycling: a petrophysical perspective

Abstract Underground coal mine reservoirs experience repeated impoundment and drainage, exposing coal pillars to dry–wet cycling and causing cumulative deterioration. This study investigated the acoustic and mechanical responses of Wudong coal specimens subjected to 0, 1, 3, and...

The Temperature Response of Suspension Bridge Cables Under Vehicle Fires: A Large-Scale Pool Fire Experiment with Polyethylene and Gasoline

Suspension cables and main cables (collectively referred to as cables) on both sides of suspension bridges are critical load-bearing components that determine overall structural stability. Cables are directly exposed to fires when burning vehicles stop in emergency or slow lanes,...

Experimental study on the deflagration and flame‐development characteristics of hydrogen‐blended natural gas flames under various initial conditions

Abstract Hydrogen‐blended natural gas (HBNG) is an effective transitional solution for large‐scale hydrogen energy transportation, whose safety requires quantitative assessment from a practical perspective. This study constructed a 60 L cylindrical deflagration experimental setup...

Deformation Detection and Structural Failure Mechanism of Large Mine Chutes: A Three-Chute Case Study at an Iron Mine

To examine the deformation behavior and failure mechanisms of large-scale mine chutes under complex service conditions, we performed multiple C-ALS three-dimensional laser scanning surveys on the 1#, 2# and 3# chutes at an iron mine in Anhui Province. The results showed that all...