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Catalytic Cracking of Triglyceride-Rich Biomass toward Lower Olefins over a Nano-ZSM-5/SBA-15 Analog Composite

机译:纳米ZSM-5 / SBA-15模拟复合材料上富含甘油三酸酯的生物质向低烯烃的催化裂解

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The catalytic cracking of triglyceride-rich biomass toward C2–C4 olefins was evaluated over a hierarchically textured nano-ZSM-5/SBA-15 analog composite (ZSC-24) under fluid catalytic cracking (FCC) conditions. The experiments were performed on a fully automated Single-Receiver Short-Contact-Time Microactivity Test unit (SR-SCT-MAT, Grace Davison) at 550 °C and different catalyst-to-oil mass ratios (0–1.2 g∙g−1). The ZSC-24 catalyst is very effective for transformation of triglycerides to valuable hydrocarbons, particularly lower olefins. The selectivity to C2–C4 olefins is remarkably high (90%) throughout the investigated catalyst-to-oil ratio range. The superior catalytic performance of the ZSC-24 catalyst can be attributed to the combination of its medium acid site amount and improved molecular transport provided by the bimodal pore system, which effectively suppresses the secondary reactions of primarily formed lower olefins.
机译:在分级织构的纳米ZSM-5 / SBA-15模拟复合材料(ZSC-24)上评估了富含甘油三酸酯的生物质对C 2 –C 4 烯烃的催化裂解)在流化催化裂化(FCC)条件下。实验是在全自动单接收器短接触时间微活度测试装置(SR-SCT-MAT​​,Grace Davison)上于550°C和不同的催化剂与油的质量比(0–1.2 g∙g < sup> -1 )。 ZSC-24催化剂非常有效地将甘油三酸酯转化为有价值的烃,特别是低级烯烃。在整个研究的催化剂与油比范围内,对C 2 –C 4 烯烃的选择性非常高(> 90%)。 ZSC-24催化剂优异的催化性能可归因于其中等的酸性位点数量和双峰孔系统提供的改善的分子传输性能,有效抑制了最初形成的低级烯烃的二次反应。

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