2008
DOI: 10.1016/j.biortech.2007.09.092
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Transesterification of soybean oil catalyzed by sulfated zirconia

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Cited by 239 publications
(107 citation statements)
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“…Metal oxides are widely used as catalyst supports because of their thermal and mechanical stability, high specific surface area, and large pore size and pore volume. Because solid acids function the same as H + in sulfuric acid for (trans)esterification, sulphonated metal oxides, such as SO 4 2-/Al 2 O 3 , SO 4 2-/TiO 2 , SO 4 2-/ZrO 2 , SO 4 2-/SnO 2 and SO 4 2-/V 2 O 5 (Garcia et al, 2008) can supply more acid species. Such solid acids are usually prepared by impregnating the hydroxides from ammonia precipitation of corresponding metal salt solutions with aqueous sulfuric acids followed by calcination.…”
Section: Supported Acid Catalystsmentioning
confidence: 99%
“…Metal oxides are widely used as catalyst supports because of their thermal and mechanical stability, high specific surface area, and large pore size and pore volume. Because solid acids function the same as H + in sulfuric acid for (trans)esterification, sulphonated metal oxides, such as SO 4 2-/Al 2 O 3 , SO 4 2-/TiO 2 , SO 4 2-/ZrO 2 , SO 4 2-/SnO 2 and SO 4 2-/V 2 O 5 (Garcia et al, 2008) can supply more acid species. Such solid acids are usually prepared by impregnating the hydroxides from ammonia precipitation of corresponding metal salt solutions with aqueous sulfuric acids followed by calcination.…”
Section: Supported Acid Catalystsmentioning
confidence: 99%
“…Heterogeneous catalysts can be separated more easily from reaction products (Di Serio et al, 2008). Saponification reactions can also be avoided by using heterogeneous acid catalysts, which expand the raw materials to vegetable oils or animal fats with high contents of FFAs, such as deep-frying oils from restaurants and food processing (Garcia et al, 2008). Bio-diesel synthesis using solid catalysts could potentially lead to cheaper production costs because of reuse of the catalyst and the possibility for carrying out both transesterification and esterification simultaneously .…”
Section: Heterogeneous Catalystsmentioning
confidence: 99%
“…Neste caso o álcool empregado foi o metanol e o catalisador à base de nióbio (Nb 2 o 5 ). 92,93 Porém, os nossos trabalhos com a empresa produtora 92 deste biodiesel e análises de materiais contidos nesse produto indicam que o catalisador é o ácido metanossulfônico.…”
Section: Catálise Heterogênea áCida E Alcalinaunclassified