The discovery of granular adsorbents for the capture of volatile organic compounds (VOCs) from humid air and rapid regeneration at low temperature is still a challenge. Here we reported formation of a granular Al-based metal organic gel, CAU-3-NH₂(gel), by adjusting heating up time in the synthesis procedure. The water and thermal stable xerogel shows high surface area (1964 m²/g) and adsorption capacity for VOCs (uptakes of toluene and hexanal reach 4.5 and 3.85 mmol/g at P/P₀ = 0.1, respectively). Dynamic adsorption experiments further conformed its outstanding adsorption performance for toluene under 50% RH, higher than that of commercial adsorbents and widely studied MOFs including BPL activated carbon, ZSM-5, zeolite 13X, XAD-16, MIL-101(Cr), CAU-1 and ZIF-8. Under the mass space velocity of 12,000 mL/g.h, CAU-3-NH₂(gel) kept 99.95% removal ratio of low concentration toluene (100 ppm) over 12 h in 3 cycles at 298 K. Furthermore, desorption experiments show its excellent regenerability under mild temperature (328 K and 358 K). The interaction of toluene-framework and adsorption process are investigated by using Grand Canonical Monte Carlo (GCMC) simulations.

发现用于从潮湿空气中捕获挥发性有机化合物（VOC）并在低温下快速再生的粒状吸附剂仍然是一个挑战。在这里，我们报告了通过调整合成过程中的加热时间，形成了颗粒状的铝基金属有机凝胶CAU-3-NH ₂（凝胶）。具有水和热稳定性的干凝胶显示出高表面积（1964 m ² / g）和对VOC的吸附能力（在P / P _0时甲苯和己醛的吸收量分别达到4.5和3.85 mmol / g分别为0.1）。动态吸附实验进一步证明了其在50％相对湿度下对甲苯的出色吸附性能，高于商业吸附剂，并广泛研究了MOF，包括BPL活性炭，ZSM-5，沸石13X，XAD-16，MIL-101（Cr），CAU -1和ZIF-8。在12,000 mL / gh的质量空速下，CAU-3-NH ₂（凝胶）在298 K的3个循环中，在12小时内保持了99.95％的低浓度甲苯（100 ppm）去除率。此外，解吸实验表明其出色温和温度（328 K和358 K）下的可再生性。甲苯框架和吸附过程之间的相互作用通过使用Grand Canonical Monte Carlo（GCMC）模拟进行了研究。