Deoxygenation of Triglycerides by Catalytic Cracking with Enhanced Hydrogen Transfer Activity
Deoxygenation of Triglycerides by Catalytic Cracking with Enhanced Hydrogen Transfer Activity
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DOI：
10.1021/acs.iecr.6b03514
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发表时间：
2017-01
影响因子：
4.2
通讯作者：
Iori Shimada;S. Kato;Naoki Hirazawa;Yoshitaka Nakamura;Haruhisa Ohta;Kengo Suzuki;T. Takatsuka
中科院分区：
文献类型：
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作者：
Iori Shimada;S. Kato;Naoki Hirazawa;Yoshitaka Nakamura;Haruhisa Ohta;Kengo Suzuki;T. Takatsuka
采用一种具有高氢转移活性的流化催化裂化催化剂，研究了催化裂化过程中甘油三酯的脱氧反应，考察了植物油作为替代燃料的有效利用。不饱和甘油三酯脱氧是快速和完全的，但少量的含氧产物，如脂肪酸，酮和醛从饱和甘油三酯产生。反应产物分析表明，含氧化合物和裂解脂肪酸碳链产生的烃之间的氢转移反应导致加氢脱氧，即使在没有氢气的情况下。具有不同长度的脂肪酸碳链的甘油三酯的催化裂化表明甘油三酯脱氧不受空间位阻的影响，并且可能发生在沸石外表面上，而烃的二次裂化发生在内表面上。我们表明，催化裂化可用于在不存在催化剂的情况下有效地将甘油三酯转化为烃。
The efficient use of plant oils as alternative fuels was investigated by studying triglyceride deoxygenation in catalytic cracking using a fluid catalytic cracking catalyst with enhanced hydrogen transfer activity. Unsaturated triglyceride deoxygenation was rapid and complete, but small amounts of oxygenated products such as fatty acids, ketones, and aldehydes were produced from saturated triglycerides. Reaction product analysis showed that hydrogen transfer reactions between oxygenates and hydrocarbons produced by cracking fatty acid carbon chains caused hydrodeoxygenation even in the absence of hydrogen. Catalytic cracking of triglycerides with fatty acid carbon chains of various lengths showed that triglyceride deoxygenation is not affected by steric hindrance, and probably occurs on zeolite external surfaces, whereas secondary cracking of hydrocarbons occurs on the internal surfaces. We showed that catalytic cracking can be used for efficient conversion of triglycerides to hydrocarbons in the absence ...