Efficient hydrogenation of CO2 to methanol over Pd/In2O3/SBA-15 catalysts. Issue 36 (February 2020)

• Record Type: Journal Article
• Authors: Jiang, Haoxi; Lin, Jing; Wu, Xiaohui; Wang, Wenyi; Chen, Yifei; Zhang, Minhua
• Is Part Of: Journal of CO₂ utilization. Issue 36(2020)
• Page Start: 33
• Page End: 39
• Publication Date: 2020-02
• Subjects: Pd/In2O3/SBA-15 -- CO2 -- Methanol -- Pd/In2O3 -- Synergetic effect; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2019.10.013
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: Two-component mesoporous catalysts were developed for CO2 hydrogenation to methanol. The oxygen vacancies on the surface of In2 O3 promote activation of CO2 to methanol. The Pd promoter facilitates creating oxygen vacancies on the surface of In2 O3 . The Pd promoter enhances the dissociation and adsorption of H2 . The as-prepared catalysts exhibited higher activity than the conventional catalysts. Abstract: The catalytic hydrogenation of CO2 to methanol has been regarded as the one of the most economical and effective ways to reduce CO2 emissions. It can also provide a feasible idea for solving the energy crisis. In this paper, a series of Pd/In2 O3 /SBA-15 catalysts were prepared by the citric acid method. The DFT simulation and catalyst characterization including the N2 adsorption, XRD, H2 -TPR, TEM, XPS and CO2 -TPD were applied. The results showed that the as-prepared Pd/In2 O3 /SBA-15 catalysts exhibited superior catalytic activity with 83.9% methanol selectivity and 12.6% CO2 conversion, corresponding to a STY of 1.1 × 10 -2 mol·h -1 ·gcat -1 under reaction conditions of 260 °C, 5 Mpa and 15, 000 cm 3 h -1 ·gcat -1 . It is suggested that the synergetic effect of H2 dissociation on Pd species and CO2 activation on In2 O3 promoted the high efficiency conversion of CO2 to methanol.