An innovative method for the coproduction of high-quality bio-oil and syngas via the integration of in situ acid pretreatment on feedstock and ex situ reforming by activated carbon catalyst was investigated in this study. Dilute acid pretreatment of rice husk was performed in a 10 wt % H₃PO₄ solution between 60 and 140 °C. Then, the catalytic pyrolysis of raw and pretreated samples was conducted using activated carbon catalyst in a two-stage fixed-bed reactor at 500 °C for 15 min. The results indicated that the catalytic process transferred energy from liquid bio-oil to gas products. Water content took up most of the mass in bio-oil (>90 wt %), while the organic part was dominant by phenols and the gas product was a CO-rich syngas. Specifically, the optimal products from catalytic pyrolysis were achieved at a pretreatment temperature of 100 °C. Results of gas chromatography–mass spectrometry (GC–MS) revealed that the phenol occupied a 67.14% relative content of organics. Via quantification, the mass yield of phenol was 2.56 wt % of bio-oil, and this value was 2.02 times that of raw bio-oil and 1.41 times that of non-pretreated samples. The volume yield of CO in syngas was significantly increased to 163.59 mL/g with the CO fraction (63.23 vol %). Further, the mechanism of phenol and CO generation from pretreated samples is proposed and discussed, which provides new insight for the clean and high value-added utilization of biomass.

中文翻译：

---

在温和的条件下，酸预处理的生物质同时催化转化为高质量的合成气和生物油

本研究研究了一种通过集成原位酸预处理原料和活性炭催化剂进行异位重整来联产高质量生物油和合成气的创新方法。稻壳的稀酸预处理是在10 wt％H ₃ PO _{4中进行的}60至140°C之间的溶液。然后，在两级固定床反应器中使用活性炭催化剂在500°C下对原始和预处理的样品进行催化热解15分钟。结果表明，催化过程将能量从液态生物油转化为气态产物。水分占据了生物油中的大部分质量（> 90 wt％），而有机部分则以苯酚为主，气体产物为富含CO的合成气。具体而言，在100°C的预处理温度下获得了催化热解的最佳产物。气相色谱-质谱（GC-MS）结果表明，苯酚占有机物的相对含量为67.14％。通过定量，苯酚的质量产率为生物油的2.56重量％，该值是原始生物油的2.02倍和1。非预处理样品的41倍。合成气中的CO的体积产率随着CO分数（63.23 vol％）显着增加到163.59 mL / g。此外，提出并讨论了预处理样品中苯酚和一氧化碳的生成机理，这为清洁和高附加值利用生物质提供了新的见识。