为了应对全球气候变暖这一国际性难题,CO_2捕集、利用和封存(Carbon Capture,Utilization and Storage,CCUS)技术应运而生,而石油石化行业作为高碳化行业,将面临更大的挑战。调研了全球石油石化行业在CCUS技术领域研究取得的最新进展,...为了应对全球气候变暖这一国际性难题,CO_2捕集、利用和封存(Carbon Capture,Utilization and Storage,CCUS)技术应运而生,而石油石化行业作为高碳化行业,将面临更大的挑战。调研了全球石油石化行业在CCUS技术领域研究取得的最新进展,列举了我国开展的一系列相关技术研发和示范项目,进一步阐述了该行业所取得的技术成果。提出了一套针对石油石化行业CCUS的技术方案,利用燃气锅炉产生的烟气与天然气进行三重整反应,将产生的合成气用于回注或者合成二甲醚(DME,分离出的CO_2用于驱油),并对这两种利用方式进行了经济性比较。在此基础上,提出了一种环境风险评估方法——定性评估为主的风险矩阵法,制定了风险重要性等级二维矩阵表和风险重要性等级划分标准,并就中国石油石化行业在CCUS技术领域的未来发展提出了几点建议。展开更多
A series of CuO-ZnO-Al2O3-La2O3/HZSM-5 biftmctional catalysts with various La loadings for dimethyl ether （DME） directly synthesized from CO2 hydrogenation were prepared. The catalysts were characterized with N2 ads...A series of CuO-ZnO-Al2O3-La2O3/HZSM-5 biftmctional catalysts with various La loadings for dimethyl ether （DME） directly synthesized from CO2 hydrogenation were prepared. The catalysts were characterized with N2 adsorption-desorption, X-ray diffraction （XRD）, H2 temperature-programmed reduction （H2-TPR）, NH3 temperature-programmed desorption （NH3-TPD） and N2O titration techniques, and tested for the synthesis of DME directly from CO2 hydrogenation in a fixed-bed reactor. The results showed that the reducibility, dispersion ofbifunctional catalysts were strongly dependent on the addition of La. With the addition of appropri- ate amount of La, the crystaUite size of CuO was decreased and the dispersion of Cu on the surface was enhanced, which resulted in the increased conversion of CO2. It was also found that the selectivity to DME was related to the intensity and amount of strong acid site on the catalyst surface. The presence of La favored the production of DME, and the optimum catalytic activity was obtained when the amount of La was 2.0 wt.%.展开更多
文摘为了应对全球气候变暖这一国际性难题,CO_2捕集、利用和封存(Carbon Capture,Utilization and Storage,CCUS)技术应运而生,而石油石化行业作为高碳化行业,将面临更大的挑战。调研了全球石油石化行业在CCUS技术领域研究取得的最新进展,列举了我国开展的一系列相关技术研发和示范项目,进一步阐述了该行业所取得的技术成果。提出了一套针对石油石化行业CCUS的技术方案,利用燃气锅炉产生的烟气与天然气进行三重整反应,将产生的合成气用于回注或者合成二甲醚(DME,分离出的CO_2用于驱油),并对这两种利用方式进行了经济性比较。在此基础上,提出了一种环境风险评估方法——定性评估为主的风险矩阵法,制定了风险重要性等级二维矩阵表和风险重要性等级划分标准,并就中国石油石化行业在CCUS技术领域的未来发展提出了几点建议。
基金supported by the National Key Technologies R&D Program of China(2011BAC01B03)the Natural Science Foundation of Yunnan Province(2013FZ035)support by Kunming University of Science and Technology through the Fund for Testingand Analyzing(No.2010213)
文摘A series of CuO-ZnO-Al2O3-La2O3/HZSM-5 biftmctional catalysts with various La loadings for dimethyl ether （DME） directly synthesized from CO2 hydrogenation were prepared. The catalysts were characterized with N2 adsorption-desorption, X-ray diffraction （XRD）, H2 temperature-programmed reduction （H2-TPR）, NH3 temperature-programmed desorption （NH3-TPD） and N2O titration techniques, and tested for the synthesis of DME directly from CO2 hydrogenation in a fixed-bed reactor. The results showed that the reducibility, dispersion ofbifunctional catalysts were strongly dependent on the addition of La. With the addition of appropri- ate amount of La, the crystaUite size of CuO was decreased and the dispersion of Cu on the surface was enhanced, which resulted in the increased conversion of CO2. It was also found that the selectivity to DME was related to the intensity and amount of strong acid site on the catalyst surface. The presence of La favored the production of DME, and the optimum catalytic activity was obtained when the amount of La was 2.0 wt.%.
