Chen Kun, Li Weining, Biney Bernard Wiafe, Li Zhuo, Shen Jiahua, Wang Zongxian
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China) 66 Changjiang West Road, Huangdao District Qingdao Shandong 266580 China
Shandong Lunan Borui Hazardous Waste Centralized Disposal Co. Ltd. Zaozhuang Shandong 277527 China.
RSC Adv. 2020 Nov 5;10(66):40329-40340. doi: 10.1039/d0ra07862j. eCollection 2020 Nov 2.
Adsorptive desulfurization (ADS) using activated carbon (AC) as adsorbent presents competitive potential in separating thiophenic sulfur from liquid fuels with high selectivity under mild operation conditions. It is also a highly economic remedy in ultra-low sulfur content situations. Most importantly, a suitable feedstock for macroscopic quantity preparation of AC adsorbents with good adsorptive desulfurization performance and low-cost is required to satisfy the requirements of this field. In this work, four representative substances (, coal, coconut shell, polyurethane plastic waste, and petroleum coke) were selected as the carbon source for the preparation of various AC adsorbents. The physicochemical properties of the prepared AC adsorbents were characterized using BET, SEM, XRD, XPS, elemental analysis and Boehm's method. The corresponding adsorptive desulfurization performance was investigated. The corresponding desulfurization capacity obtained was in the order: CS-ACA > PUPW-ACA > PC-ACA > AT-ACA. Under the optimal conditions of 30 °C and 30 min contact time, the desulfurization rate of 0.5 g PUPW-ACA can reach about 98%. The HHV of non-condensable gas generated during the experiment was calculated, and the HHV of the pyrolysis oil was measured. The results showed that the by-products produced by PC had the highest HHV. The economics of the desulfurization of the four kinds of activated carbon were analyzed and evaluated. From a comprehensive analysis, PUPW-ACA has the highest economic production value and has the potential for industrial production. This plays a dual role in environmental protection.
以活性炭（AC）为吸附剂的吸附脱硫（ADS）在温和操作条件下从液体燃料中选择性分离噻吩硫方面具有竞争潜力。在超低硫含量情况下，它也是一种极具经济性的补救措施。最重要的是，需要一种合适的原料来大规模制备具有良好吸附脱硫性能且低成本的AC吸附剂，以满足该领域的需求。在这项工作中，选择了四种代表性物质（煤、椰壳、聚氨酯塑料废料和石油焦）作为制备各种AC吸附剂的碳源。使用BET、SEM、XRD、XPS、元素分析和博姆法对制备的AC吸附剂的物理化学性质进行了表征。研究了相应的吸附脱硫性能。得到的相应脱硫能力顺序为：CS - ACA > PUPW - ACA > PC - ACA > AT - ACA。在30℃和30分钟接触时间的最佳条件下，0.5 g PUPW - ACA的脱硫率可达到约98%。计算了实验过程中产生的不可冷凝气体的高位发热量（HHV），并测量了热解油的HHV。结果表明，PC产生的副产物具有最高的HHV。分析和评估了四种活性炭脱硫的经济性。综合分析表明，PUPW - ACA具有最高的经济生产价值，具有工业生产潜力。这在环境保护方面发挥了双重作用。
