利用光活性催化剂进行废橡胶轮胎的太阳能热解。
Solar pyrolysis of waste rubber tires using photoactive catalysts.
机构信息
Department of Chemical and Petroleum Engineering, American University of Beirut, Beirut, Lebanon.
Department of Chemical and Petroleum Engineering, American University of Beirut, Beirut, Lebanon.
出版信息
Waste Manag. 2018 Jul;77:10-21. doi: 10.1016/j.wasman.2018.04.044. Epub 2018 May 2.
The solar pyrolysis of waste tire rubber was investigated with the application of heterogeneous photocatalysts including TiO, Pd/TiO, Pt/TiO, Pd-Pt/TiO, and BiO/SiO/TiO. Experiments were performed at temperatures ranging between 550 and 570 °C under solar irradiations of 950-1050 W/m. The gas yield from non-catalytic solar pyrolysis was at 20% while the use of TiO catalyst increased the gas yield to 27%. Doping of TiO with noble metals and BiO/SiO metal oxides enhanced further the cracking ability of the catalyst. BiO/SiO/TiO gave a 32% gas yield. The highest gas yields of 40% and 41% were achieved over Pd-Pt/TiO and Pd/TiO catalysts, respectively. Catalyst characterization by BET, SEM, EDX and XRD showed the role of metal doping in altering the morphology of TiO, resulting in nanocrystallites, larger pore volume and higher surface area. Both, Pd and Bi influenced the photocatalytic properties of TiO improving cracking activity during pyrolysis of waste rubber.
采用包括 TiO、Pd/TiO、Pt/TiO、Pd-Pt/TiO 和 BiO/SiO/TiO 在内的多相光催化剂研究了废轮胎橡胶的太阳能热解。实验在 550 至 570°C 的温度范围内，在 950-1050 W/m 的太阳辐射下进行。非催化太阳能热解的气体产率为 20%，而 TiO 催化剂的使用将气体产率提高到 27%。贵金属掺杂 TiO 和 BiO/SiO 金属氧化物进一步增强了催化剂的裂化能力。BiO/SiO/TiO 的气体产率为 32%。Pd-Pt/TiO 和 Pd/TiO 催化剂的气体产率分别达到了 40%和 41%的最高值。通过 BET、SEM、EDX 和 XRD 对催化剂进行表征表明，金属掺杂在改变 TiO 的形态方面发挥了作用，导致形成了纳米晶、更大的孔体积和更高的表面积。Pd 和 Bi 都影响了 TiO 的光催化性能，在废橡胶热解过程中提高了裂化活性。
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