Energy, Materials and Environment Laboratory, Universidad de La Sabana, Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá, Colombia.
Faculty of Engineering, Chemical Engineering, Universidad de La Salle, Carrera 2 # 10-70, Bogotá, Colombia.
Waste Manag. 2022 Jun 15;147:48-59. doi: 10.1016/j.wasman.2022.05.012. Epub 2022 May 24.
Residual biomass gasification is a promising route for the production of H-rich syngas. However, the simultaneous formation of pollutants such as light hydrocarbons (HCs), benzene, toluene and xylenes (BTEX), polycyclic aromatic hydrocarbons (PAHs), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during gasification must be controlled. As a result, this study evaluated the effect of temperature and catalytic reforming over a Rh-Pt/CeO-SiO catalyst during steam gasification of sugarcane residual biomass on syngas composition and pollutant removal. The above was carried out in a horizontal moving reactor, an Amberlite XAD-2 polyaromatic resin was used to collect the contaminants and characterization of the catalyst was performed. In this study, a concentration of up to 37 mol% of H, a yield of 23.1 g H kg, and a H/CO ratio ≥2 were achieved when gasification and reforming were integrated. In addition, the catalyst characterization showed that Rh-Pt/CeO-SiO was not susceptible to sintering and favored the formation of hydroxyl groups that promoted CO oxidation, thereby increasing the H/CO ratio, as confirmed by in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS). At 800 °C, where a high H yield was obtained, 209 g Nm of light HCs and BTEX, 10.9 g Nm of PAHs, and 32.5 ng WHO-TEQ Nm of PCDD/Fs were formed after gasification. Interestingly, after catalytic reforming, 62% of light HCs and BTEX, 60% of PAHs, and 94% of PCDD/Fs were removed, leading to cleaner syngas with properties that allow it to be used in a wide range of energy applications.
剩余生物质气化是生产富 H 合成气的一种很有前途的途径。然而，在气化过程中必须控制污染物的同时形成，如轻烃 (HCs)、苯、甲苯和二甲苯 (BTEX)、多环芳烃 (PAHs)、多氯二苯并对二恶英和二苯并呋喃 (PCDD/Fs)。因此，本研究评估了在甘蔗剩余生物质水蒸气气化过程中，温度和 Rh-Pt/CeO-SiO 催化剂的催化重整对合成气成分和污染物去除的影响。以上在水平移动反应器中进行，采用 Amberlite XAD-2 多环芳烃树脂收集污染物，并对催化剂进行了表征。在这项研究中，当气化和重整相结合时，实现了 H 浓度高达 37 mol%，产氢量为 23.1 g H kg，H/CO 比≥2。此外，催化剂的表征表明，Rh-Pt/CeO-SiO 不易烧结，有利于形成促进 CO 氧化的羟基，从而提高 H/CO 比，这一点通过原位漫反射红外傅里叶变换光谱 (DRIFTS)得到了证实。在 800°C 时，获得了高的产氢量，气化后形成了 209 g Nm 的轻 HCs 和 BTEX、10.9 g Nm 的 PAHs 和 32.5 ng WHO-TEQ Nm 的 PCDD/Fs。有趣的是，经过催化重整，62%的轻 HCs 和 BTEX、60%的 PAHs 和 94%的 PCDD/Fs 被去除，得到了更清洁的合成气，其性质允许它在广泛的能源应用中使用。
