Comparison of approaches to determine hydrogen consumption during catalytic hydrotreating of oil fractions

Castañeda, Luis C.; Muñoz, José A.D.; Ancheyta, Jorge

doi:10.1016/j.fuel.2010.11.047

Cited by 53 publications

(42 citation statements)

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“…Knowing the gas composition and pressure, it was possible to calculate the amount of hydrogen in the gases and this amount was compared with the initial amount of free H 2 present in the gas-product. According to information from the literature (Castañeda et al, 2011), this method could be generating an error of 0.1-6 % of total hydrogen consumption because the dissolved hydrogen in the liquid phase was not calculated. The total actual hydrogen consumption is H cons = ∆H gas + H diss (Castañeda et al, 2011).…”

Section: Fig 3 Calculated Hydrogen Consumptionmentioning

confidence: 99%

“…According to information from the literature (Castañeda et al, 2011), this method could be generating an error of 0.1-6 % of total hydrogen consumption because the dissolved hydrogen in the liquid phase was not calculated. The total actual hydrogen consumption is H cons = ∆H gas + H diss (Castañeda et al, 2011). For these reasons, the results should be taken as approximate.…”

Section: Fig 3 Calculated Hydrogen Consumptionmentioning

confidence: 99%

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Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

et al. 2015

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Demand for high-value petroleum products is increasing and crude oils and their distillation products are becoming heavier. The thermal cracking of a vacuum residue (VR) from REB (Russian Export Blend) crude oil was carried out in an autoclave. LCO (light cycle oil), naphtha, and brown coal (BC) were added with the aim of studying their effect on the final products composition. The elemental analysis (%C, %N, %H, %S) was performed and dynamic viscosity, density, GC of gases ("Refinery Gas Analysis"), solubility in hexane and toluene, and simulated distillation were examined in raw materials, gaseous, and liquid products. As anticipated, due to its high aromatics content, the addition of LCO proved the best option, obtaining the highest yield of lighter liquids. The naphtha addition resulted in a slight increment of heavier products in the gaseous phase and higher yields to solids. The literature does not contain any extensive studies of the addition of BC to VR in the hydrovisbreaking process. The addition of BC resulted in an increment in the yield of the gaseous product and assumed the highest relative total consumption of hydrogen during the reaction.

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Section: Fig 3 Calculated Hydrogen Consumptionmentioning

confidence: 99%

Section: Fig 3 Calculated Hydrogen Consumptionmentioning

confidence: 99%

Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

et al. 2015

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“…Furthermore, these models have shown to be feed dependent. Castañeda et al reported that the models developed by Lee et al and Stratiev et al worked relatively well with middle fractions obtained during hydrotreating. In contrast, the methods presented a variation of up to 29.2 % when applied to heavy gas oils.…”

Section: Introductionmentioning

confidence: 99%

“…The total H 2 consumption in the industry not only involves the amount of H 2 consumed in hydrotreating reactions, but also considers mechanical losses in the purification and compressing units, and dissolved H 2 (unreacted H 2 ) in the final product . Castañeda et al reported that the estimation of total H 2 consumption could have an error of ∼6 % if dissolved H 2 is not considered. In the case of experimental studies, dissolved H 2 and chemical H 2 consumption should be taken into account.…”

Section: Introductionmentioning

confidence: 99%

“…The determination of H 2 consumption in the hydrotreating process is generally carried out by the analysis of H 2 content in gas streams and the analysis of H 2 content in liquid streams. These methods require the use of different analytical techniques, e.g., elemental analysis or nuclear magnetic resonance for the analysis of liquids and high‐resolution gas chromatography for the analysis of gases . However, two the major challenges, which were faced by the industry in measuring the H 2 consumption include: (i) the non‐availability of analytical equipment on‐site, and (ii) the processing of a new feedstock requires preliminary studies about the optimization of process conditions and H 2 consumption, which would be too costly to perform in reactors of an industrial scale.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of H₂ consumption and process optimization for hydrotreating of light gas oils

et al. 2019

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Hydrogen consumption regression models were developed for the hydrotreating of various light gas oil streams derived from Canadian oil sands including virgin light gas oil (VLGO), hydrocracker light gas oil (HLGO), coker light gas oil (KLGO), and a partially hydrotreated heavy gas oil (PHTHGO) stream over commercial NiMo/ɣ‐Al2O3 in a micro‐trickle bed reactor. The experiments were designed by central composite design (CCD) and covered a wide range of temperatures (353–387 °C), pressures (8.27–10.12 MPa), and liquid hourly space velocity (LHSV) (0.7–2.3 h−1), at H2/oil ratio = 600 m3 H2/m3 oil. A composite regression model comprising of all four feed streams was also developed and tested against a new batch of experimental data. The composite model compared favourably with the experimental data. In addition, the composite model fits better than similar correlations from the literature. The effects of process conditions on hydrodesulphurization (HDS), hydrodenitrogenation (HDN), and hydrodearomatization (HDA) conversions were also studied in this work. Based on the experimental data, regression models were developed for each feedstock to obtain the optimum conditions to maximize hydrotreating conversions.

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Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

Liu,

Zhang,

Luo

et al. 2024

ChemPlusChem

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Identifying the unnecessary H2 consumption existing in diesel hydrotreating process and calculating theoretical minimum H2 consumption are extremely critical for reducing H2 consumption in consideration of carbon reduction and resource utilization improvement. In this work, chemical reactions happened during diesel hydrotreating were categorized into hydrodesulfurization (HDS), hydrodenitrogenation (HDN), saturation of monocyclic aromatic hydrocarbons (MAHs), saturation of polycyclic aromatic hydrocarbons (PAHs), hydrogenation of olefins (HGO) and hydrocracking reactions (HCR). Then, in order to gain insights into where and how much H2 can be reduced, the ideal molecular compositions of the products were analyzed when theoretical minimum H2 was achieved for each type of reactions, which can give a genuine value of average relative molecular weight and average number of moles of H2 consumed per mole of reactants, leading to the establishment of method for calculating theoretical minimum H2 consumption. Additionally, the above method was used to calculate theoretical minimum H2 consumption of five diesel feedstocks with different properties to study the influence of content of S, N and PAHs in the feed on theoretical minimum H2 consumption. This method can provide guidance for experiments of H2 consumption reduction, and also help the refineries to save potential costs of H2.

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Comparison of approaches to determine hydrogen consumption during catalytic hydrotreating of oil fractions

Cited by 53 publications

References 10 publications

Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

Modelling of H₂ consumption and process optimization for hydrotreating of light gas oils

Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

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Comparison of approaches to determine hydrogen consumption during catalytic hydrotreating of oil fractions

Cited by 53 publications

References 10 publications

Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

Hydrovisbreaking of vacuum residue from Russian Export Blend: influence of brown coal, light cycle oil, or naphtha addition

Modelling of H2 consumption and process optimization for hydrotreating of light gas oils

Developing an Approach for Calculating Theoretical Minimum Hydrogen Consumption during Catalytic Hydrotreating of Diesel

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Modelling of H₂ consumption and process optimization for hydrotreating of light gas oils