摘要
采用酸碱连续处理法对汽油吸附脱硫装置外排废吸附剂进行复活,利用15 mL固定床小试装置评价了其脱硫性能,研究了复活过程中pH值变化对复活效果的影响。结果表明:酸碱连续处理可以有效溶解废吸附剂中Zn_(2)SiO_(4)等非活性组分,并使其重新沉淀负载;随着反应体系pH值的升高,新生成的活性组分粒径更小;当反应体系pH值为8或9时,复活剂比表面积、孔体积及孔径分布与新吸附剂较为接近;当pH值为9时,反应滤液中锌离子、镍离子和铝离子质量浓度分别为0.92、0.79、0.51 mg/L;经过酸碱连续处理的复活剂的脱硫性能基本与新吸附剂持平;随着反应体系pH值的升高,复活剂脱硫率基本呈升高趋势;当pH值超过9时,脱硫率增幅减缓。因此,废吸附剂复活反应体系最佳pH值为9。
The continuous acid-base treatment method was used to revive the spent adsorbent discharged from the gasoline adsorption desulfurization unit.The desulfurization performance was evaluated using a 15 mL fixed bed small-scale test plant.The influence of pH value on the revival effect was studied.The results indicate that continuous acid-base treatment can effectively dissolve non-active components such as Zn_(2)SiO_(4)in the spent adsorbent and make it re-deposition and load;as the pH value of the reaction system increases,the newly generated active components have smaller particle sizes;when the pH value is 8 or 9,the specific surface area,pore volume,and pore size distribution of the activator are closer to those of the new adsorbent;when the pH value is 9,the mass concentrations of zinc ions,nickel ions,and aluminum ions in the reaction filtrate are 0.92,0.79,and 0.51 mg/L,respectively;the desulfurization performance of the revived agent after continuous acid-base treatment is basically on par with that of the new adsorbent;as the pH value increases,the desulfurization rate of the activator shows a basic upward trend;when the pH value exceeds 9,the increase in desulfurization rate slows down.Therefore,the optimal pH value for the revival reaction system of spent adsorbent is 9.
作者
张轩
李文选
杨涛
赵丽信
朱永红
杨天华
Zhang Xuan;Li Wenxuan;Yang Tao;Zhao Lixin;Zhu Yonghong;Yang Tianhua(Hydrocarbon High-efficiency Utilization Technology Research Center of YCPC,Xi’an,Shaanxi 710075)
出处
《炼油技术与工程》
CAS
2024年第9期43-46,共4页
Petroleum Refinery Engineering
基金
陕西省创新能力支撑计划项目(2023-CX-PT-32)。
关键词
PH值
汽油吸附脱硫装置
废吸附剂复活
酸碱连续处理
孔结构
相结构
金属离子
脱硫率
pH value
gasoline adsorption desulfurization unit
revival of spent adsorbent
continuous acid-base treatment
pore structure
phase structure
metal ion
desulfurization rate
