Assignment2: Writing an introduction

The conversion carbon dioxide to LPG over hybrid catalysts by synthesis catalyst and B-type zeolite

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Panya Wattanapaphawong

Stage 1: Carbon dioxide is one of the most abundant and widely distributed carbon resources, and has become the focus of attention because of its greenhouse effects. Therefore, the utilization of carbon dioxide is desirable for the effective method for reducing carbon dioxide emission. Many kinds of strategies with this regard have been proposed to solve this intractable problem (L. Congming et al., 2014). Liquefied Petroleum Gas (LPG), a mixture of propane and butanes, has environmentally benign characteristics and widely been used as clean fuels. Direct synthesis of LPG from syngas is an important choice for converting natural gas to high-value-added products (G. Qingjie et al., 2007).

Stage 2: Many previous studies have reported on the utilization of carbon dioxide for synthesis LPG or chemical. According to Qingjie et al. (2007), they study effect of Cu-ZnO over B-zeolite found that under the suitable conditions, Cu–ZnO/Pd-b catalyst exhibit an excellent catalytic performance for carbon dioxide to LPG: 72.2%. Kenji Asami et al. (2005) reported Co-Mo-Ni in hybrid catalyst could restrain the decomposition of DME into carbon dioxide, but the DME conversion and selectivity for LPG were not high. L. Congming et al. (2014) reported Hybrid catalysts consisting of Zr modified Cu–Zn catalyst with Pd-modified B-zeolite were found to show high and stable conversion for carbon dioxide hydrogenation. The stable activity of carbon dioxide conversion can be attributed to the high water resistant of CZZA. The hybrid catalyst consisting of CZZA with Pd-B was effective for LPG synthesis with selectivity as high as 75%.

Stage 3: From literature review found that the condition of carbon dioxide conversion to LPG was high condition such as high temperature, high pressure etc.

Stage 4&5: In this research work will study catalyst of conversion carbon dioxide to LPG at low condition and study condition of new catalyst. The selectivity of LPG as high as 90%.