TY - JOUR
TI - Study on the explosion suppression performance of methane-air mixtures based on NH4H2PO4-modified dry water gel
AU - Sun Hao
AU - Jing Guoxun
AU - Liu Chuang
AU - Jia Hailin
JN - Thermal Science
PY - 2026
VL - 30
IS - 1
SP - 591
EP - 602
PT - Article
AB - As a vital energy source, CH4 poses significant explosion risks that threaten industrial safety. To address the limitations of conventional CH4 explosion suppressants, a modified dry water gel (NH4H2PO4-SCDW) was prepared by incorporating 5 wt.% NH4H2PO4, 0.1 wt.% sodium alginate, and 0.05 wt.% calcium lactate. The physical properties and explosion suppression performance of the composite were systematically evaluated. Experimental results showed that NH₄H₂PO₄-SCDW exhibited not only excellent structural stability and water retention capability, but also rapid water release under high temperature conditions, thereby effectively suppressing explosions. In pipeline explosion tests, NH4H2PO4-SCDW exhibited significantly better suppression performance than conventional dry water, with the peak overpressure at pressure sensor 1# reduced by approximately 16.95% on average, and the flame propagation distance shortened by 24.13% at a spray dosage of 0.48 g. Mechanism analysis revealed that NH4H2PO4-SCDW suppresses methane combustion through the synergistic effects of physical and chemical inhibition, effectively interrupting the combustion chain reaction. This study provides theoretical support and experimental evidence for the development of high-efficiency and environmentally friendly fire and explosion suppressants.
DO - 10.2298/TSCI250411125S
ER -