Nickel removal from nickel-5,10,15,20-tetraphenylporphine using supercritical water in absence of catalyst: A basic study

Mandal, Pradip Chandra; Diono, Wahyu; Sasaki, Mitsuru; Goto, Motonobu

doi:10.1016/j.jhazmat.2011.01.059

Cited by 16 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It seems that vanadium is more stable and difficult to remove than nickel from porphyrin structures. They observed that the kinetics of the process were consistent with first order reactions and that the reaction mechanism proceeded via two-step hydrogenation and hydrogenolysis reactions. − …”

Section: Reactions Of Heavy Oil Model Compounds In Ncw and Scwmentioning

confidence: 83%

Application of Water in Hydrothermal Conditions for Upgrading Heavy Oils: A Review

et al. 2017

View full text Add to dashboard Cite

The use of water in hydrothermal and supercritical conditions as a medium to upgrade heavy oil fractions has shown promising results and presents an interesting alternative for heavy oil processing. Water at these conditions improves transport properties increasing the solubility in the medium and reducing the viscosity of the oil, which facilitates the upgrading process. This review focuses on the use of water as a medium to recover and upgrade heavy oils. An analysis of the main reactions occurring, effect of process conditions, and role of water in the reaction mechanism is carried out based on experimental results found in the literature. Studies performed with model compounds that have enabled a proper understanding of the reaction mechanisms, kinetics, and effect of process conditions in the upgrading of heavy oil in near critical or supercritical water are included. An overview of the main challenges of the technology such as corrosion and salt deposition as well as some innovative reactor designs to solve them is provided. Information regarding research carried out in this field has been linked to the growing industrial interest in the technology showing recent developments and registration of patents on reactor designs and processes involving heavy oil upgrading in near and supercritical water.

show abstract

Section: Reactions Of Heavy Oil Model Compounds In Ncw and Scwmentioning

confidence: 83%

Application of Water in Hydrothermal Conditions for Upgrading Heavy Oils: A Review

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Most experiments were conducted in a batch reactor in this study. The experimental setup has been described in detail elsewhere, and only a brief description is given below. The batch experiments were conducted in an 8.8‐mL batch reactor (AKICO, Japan) lined with SUS‐316.…”

Section: Methodsmentioning

confidence: 99%

Selective conversion of glucose into lactic acid and acetic acid with copper oxide under hydrothermal conditions

et al. 2012

Self Cite

View full text Add to dashboard Cite

in Wiley Online Library (wileyonlinelibrary.com).Biomass as a source for chemicals production attracts growing attention due to the decreasing storage of fossil fuels and global warming caused by emission of CO 2 . In this study, conversion of glucose with copper oxide (CuO) was studied under alkaline hydrothermal conditions using a batch reactor and continuous flow reactor. CuO, as an oxidant, greatly improves the yields of lactic acid (LA) and acetic acid from glucose and was reduced into Cu 2 O and Cu. Selective production of LA with the highest yield of 59% and acetic acid with the highest yield of 32% can be achieved by controlling reaction time, temperature, and addition of CuO. A possible mechanism of conversion of glucose with CuO was proposed.

show abstract

“…Metals deposit on the catalyst and decrease catalyst surface area by plugging their pores, thereby rendering them inactive . Metals promote dehydrogenation reactions during the cracking sequence, which results in an increase in the production of coke and dry gas and decrease in gasoline production. − , The hydrotreatment process has a lower catalyst lifetime when heavy metals are present in the crude, because of the above-mentioned reasons. High amount of metals in the crude makes production costly by increasing the amount of hydrogen needed for the process and by increasing yield loss due to carbon rejection.…”

Section: Introductionmentioning

confidence: 99%

A Review of the Unconventional Methods Used for the Demetallization of Petroleum Fractions over the Past Decade

et al. 2015

View full text Add to dashboard Cite

Metals in petroleum fractions have a deleterious effect on the refining equipment and catalyst. They corrode the equipment, plug the catalyst pores, and create irregularities in the system. With reference to today's petroleum industry, the fast depletion of light crude has created the need to process heavier crudes with much higher metal content. Hence, the need to remove traces of harmful metals and restrict their accumulation in feed stocks has become a pressing issue. In this context, we review developments over the past decade in regard to the methods of metal removal with a focus on unconventional methods, such as the use of molecularly imprinted polymers, supercritical fluids, and irradiation. Other methods of demetallization discussed include the usage of nanocatalysts, micro-organisms, and certain solvents. The removal of vanadium and nickel were reviewed most, because of the abundance of these elements in the crude.

show abstract

Nickel removal from nickel-5,10,15,20-tetraphenylporphine using supercritical water in absence of catalyst: A basic study

Cited by 16 publications

References 18 publications

Application of Water in Hydrothermal Conditions for Upgrading Heavy Oils: A Review

Application of Water in Hydrothermal Conditions for Upgrading Heavy Oils: A Review

Selective conversion of glucose into lactic acid and acetic acid with copper oxide under hydrothermal conditions

A Review of the Unconventional Methods Used for the Demetallization of Petroleum Fractions over the Past Decade

Contact Info

Product

Resources

About