Pyrolyzer–GC/MS system-based analysis of the effects of zeolite catalysts on the fast pyrolysis of Jatropha husk

Mochizuki, Takehisa; Chen, Shih‐Yuan; Toba, Makoto; Yoshimura, Y.

doi:10.1016/j.apcata.2013.02.022

Cited by 57 publications

(38 citation statements)

References 30 publications

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“…It is a mixture of partially hydrogenated vegetable oil and bio-oil, which is unlike conventional cedar-or pine-derived bio-oils. Our earlier studies showed that Jatropha bio-oil contains large amounts of heteroatoms (oxygen > 20 wt %, nitrogen > 3 wt %, and sulfur > 500 ppm) [9,[14][15][16], which may severely affect the catalytic performance of the transition metal catalysts and mesoporous sulfide catalysts frequently used in the upgrading process. However, mesoporous sulfide catalysts possess high activities and robust structures in the co-processing of heteroatom-containing bio-oil with petroleum distillates to produce clean fuels compared to transition metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

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Co-Processing of Jatropha-Derived Bio-Oil with Petroleum Distillates over Mesoporous CoMo and NiMo Sulfide Catalysts

et al. 2018

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Abstract:The co-processing of an unconventional type of Jatropha bio-oil with petroleum distillates over mesoporous alumina-supported CoMo and NiMo sulfide catalysts (denoted CoMo/γ-Al 2 O 3 and NiMo/γ-Al 2 O 3 ) was studied. Either a stainless-steel high-pressure batch-type reactor or an up-flow fixed-bed reaction system was used under severe reaction conditions (330-350 • C and 5-7 MPa), similar to the conditions of the conventional diesel hydrodesulfurization (HDS) process. To understand the catalytic performance of the mesoporous sulfide catalysts for co-processing, we prepared two series of oil feedstocks. First, model diesel oils, consisting of hydrocarbons and model molecules with various heteroatoms (sulfur, oxygen, and nitrogen) were used for the study of the reaction mechanisms. Secondly, low-grade oil feedstocks, which were prepared by dissolving of an unconventional type of Jatropha bio-oil (ca. 10 wt %) in the petroleum distillates, were used to study the practical application of the catalysts. Surface characterization by gas sorption, spectroscopy, and electron microscopy indicated that the CoMo/γ-Al 2 O 3 sulfide catalyst, which has a larger number of acidic sites and coordinatively unsaturated sites (CUS) on the mesoporous alumina framework, was associated with small Co-incorporated MoS 2 -like slabs with high stacking numbers and many active sites at the edges and corners. In contrast, the NiMo/γ-Al 2 O 3 sulfide catalyst, which had a lower number of acidic sites and CUS on mesoporous alumina framework, was associated with large Ni-incorporated MoS 2 -like slabs with smaller stacking numbers, yielding more active sites at the brims and corresponding to high hydrogenation (HYD) activity. Concerning the catalytic performance, the mesoporous CoMo/γ-Al 2 O 3 sulfide catalyst with large CUS number was highly active for the conventional diesel HDS process; unfortunately, it was deactivated when oxygen-and nitrogen-containing model molecules or Jatropha bio-oil were present in the oil feedstock. In contrast, the mesoporous NiMo/γ-Al 2 O 3 sulfide catalyst, which had a high HYD activity and low affinity for heteroatoms, was efficient in the simultaneous removal of those heteroatoms from model diesel oils, and, in particular, Jatropha bio-oil co-fed with petroleum distillates. This could allow the production of a drop-in diesel-like fuel, which would be a greener fuel and reduce the CO 2 emissions and hazardous exhaust gases produced by the transport sector, reducing the burden on the environment.

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Section: Introductionmentioning

confidence: 99%

“…The plant, which is in Thailand, has a relatively large production capacity of ca. 20 kg h −1 [14][15][16]. This Jatropha bio-oil naturally consists of fatty acids, fatty acid methyl esters, and amides (>50 wt %) in addition to relatively small amounts of hydrocarbons, and oxygen-and nitrogen-containing heterocyclic compounds.…”

Section: Introductionmentioning

confidence: 99%

Co-Processing of Jatropha-Derived Bio-Oil with Petroleum Distillates over Mesoporous CoMo and NiMo Sulfide Catalysts

et al. 2018

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“…Zeolite beta and its modified versions are known to be effective catalysts for several reactions concerning the valorisation of biomass, e.g. corn fiber to Fur [38]; levuglucosan (an intermediate of (hemi)cellulose pyrolysis) to glucose [39] or Fur [40]; saccharides to Fur [41,42], 5-(hydroxymethyl)furfural (HMF) [42][43][44][45][46][47], or LEs [48,49]; cellulose and hemicelluloses to diesel [50]; hemicelluloses to polyols [51]; C-3 sugar to methyl lactate and lactic acid [52]; FA to 2-(ethoxymethyl)furfural (EMF) and ethyl levulinate (EL) [53]; biodegradable surfactants via acetalisation [54] or etherification of HMF [55]; Fur to GVL [4]; pyrolysis of biomass or derived compounds to aromatic/aliphatic 4 hydrocarbons [56][57][58][59][60][61][62][63][64][65][66]; sugarcane bagasse to bio-oil and upgrading to fuel [67]; co-conversion of biogenic waste and vegetable oil [68]; and pyrolysis of organosolv lignin to phenolic compounds [69,70]. The introduction of different elements into zeolite beta widens its catalytic potential.…”

Section: Introductionmentioning

confidence: 99%

One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

Antunes

Lima

Neves

et al. 2015

Journal of Catalysis

128

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Aiming at the valorisation of furfural (Fur) via sustainable routes based on process intensification and heterogeneous catalysis, the one-pot conversion of this renewable platform chemical to useful bio-products, namely furfuryl alkyl ethers (FEs), levulinate esters (LEs), levulinic acid (LA), angelica lactones (AnLs) and -valerolactone (GVL), was investigated using a single heterogeneous catalyst, in 2-butanol, at 120 ºC. Various chemical 2 reactions are involved in this process, which requires catalysts with active sites for acid and reduction chemistry. For this purpose, it was explored for the first time the catalytic potentialities of modified versions of zeolite beta containing Al and Sn sites prepared from commercially available nanocrystaline zeolite beta via post-synthesis partial dealumination followed by solid-state ion-exchange. The post-synthesis conditions influenced considerably the catalytic performances of these types of materials. The best-performing catalyst was (Sn) SSIE -beta1 with Si/(Al+Sn)=19 (Sn/Al=27.6), which led to total yield of bio-products of 83% at 86% Fur conversion, and exhibited steady catalytic performance for six consecutive runs. A systematic catalytic study using the prepared catalysts with different bio-products as substrates, together with the molecular level and microstructural characterisation of the materials, helped understand the effects of different material properties on the specific reaction pathways in the overall system. These studies led to mechanistic insights into the reaction network of Fur to the bio-products in alcohol media, upon which a kinetic model was developed for the first time. The superior performance of (Sn) SSIE -beta1 in various steps was related to the dealumination degree, dispersion and amount of Sn-sites, and acid properties.

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“…Benzene may also be produced from the catalytic demethylation/decomposition of toluene. Mochizuki and co-workers [131] used jatropha husk and cedar wood for the reaction over a range of zeolite systems. The jatropha husk was found to be composed of 48%, 5.8% and 1.6% carbon, hydrogen and nitrogen, respectively.…”

Section: Effect Of Zeolite Topology and Textural Propertiesmentioning

confidence: 99%

In situ fast pyrolysis of biomass with zeolite catalysts for bioaromatics/gasoline production: A review

Galadima

Muraza

2015

Energy Conversion and Management

214

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Pyrolyzer–GC/MS system-based analysis of the effects of zeolite catalysts on the fast pyrolysis of Jatropha husk

Cited by 57 publications

References 30 publications

Co-Processing of Jatropha-Derived Bio-Oil with Petroleum Distillates over Mesoporous CoMo and NiMo Sulfide Catalysts

Co-Processing of Jatropha-Derived Bio-Oil with Petroleum Distillates over Mesoporous CoMo and NiMo Sulfide Catalysts

One-pot conversion of furfural to useful bio-products in the presence of a Sn,Al-containing zeolite beta catalyst prepared via post-synthesis routes

In situ fast pyrolysis of biomass with zeolite catalysts for bioaromatics/gasoline production: A review

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