Sulfur Tolerant Magnesium Nickel Silicate Catalyst for Reforming of Biomass Gasification Products to Syngas

Long, R.Q.; Monfort, Scott M.; Arkenberg, Gene; Matter, Paul H.; Swartz, S. L.

doi:10.3390/catal2020264

Cited by 11 publications

(4 citation statements)

References 41 publications

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“…Similar behaviours in experiments of < 30 h have already been reported in the literature . Longer experiments have also been published with no apparent deactivation of the catalyst (magnesium‐Ni‐silicate solution) at concentrations of 10–20 μL/L of H 2 S over a 400 h period at 900 °C …”

Section: Resultssupporting

confidence: 84%

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming

2016

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The objective of this work was to test resistance to hydrogen sulphide (H2S) of a recently‐patented nickel‐aluminum (Ni‐Al) spinel on Al2O3/YSZ ceramic support in catalytic reforming of methane (CH4). Previous studies showed that the catalyst is efficient for both steam reforming of complex hydrocarbons (diesel) and dry reforming of CH4. In the latter case, carbon formation was avoided for 275 h with a carbon dioxide (CO2)/CH4 ratio of 1.2. Catalytic activity was monitored at various temperatures and H2S concentrations (780–850 °C and 1.28–237 μL/L (ppmv) H2S). All tests were conducted at atmospheric pressure in a differential reactor setup. The other experimental conditions were: molar ratio 1 CO2/1 CH4/0.1 H2O, catalyst mass of 0.3 g, and gas hourly space velocity of 7000–8000 mLSTP/(gcata · h). Helium was used as the carrier gas for H2S. The NiAl2O4/Al2O3‐YSZ catalyst was loaded with nickel (Ni) 0.05 g/g (5 mass%), the Al2O3/YSZ mass ratio was 1/1, and YSZ was Y2O3‐stabilized ZrO2 (Y2O3 0.07 g/g (7 mass%)). The results showed the fastest deactivation at low temperatures and the highest H2S concentration. Catalyst activity could be partially recovered by stopping the H2S feed, and entirely recovered by calcining it at 900 °C in air. Essentially, YSZ had no effect on catalyst resistance to the presence of H2S. The catalyst gave results comparable to a commercial catalyst tested and reported in the literature.

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Section: Resultssupporting

confidence: 84%

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming

2016

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“…The magnesium–silicate synergy was supposed to explain the good resistance to H 2 S during hydrocarbons reforming. However, even though the catalyst seems to have interesting properties, one should consider that the authors carried out the tests at high temperature (900 °C) and with a low H 2 S content (20 ppm) …”

Section: Biosyngas Catalytic Purificationmentioning

confidence: 99%

“…However, even though the catalyst seems to have interesting properties, one should consider that the authors carried out the tests at high temperature (900 °C) and with a low H 2 S content (20 ppm). 133 4.4.2.3.2. Zeolites.…”

Section: Energy and Fuelsmentioning

confidence: 99%

Overview and Essentials of Biomass Gasification Technologies and Their Catalytic Cleaning Methods

et al. 2016

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Obtaining a tar-free biosyngas from biomass gasification processes has been the subject of many studies in the past 2 decades, and it still remains the major technologic and economic challenge. Unfortunately, the countless publications about gasification technologies and different techniques permitting reduction of the tar present at the outlet of gasifier reactors usually confuse inexperienced persons who attempt to further research this subject. More than presenting the basis of biomass gasification technologies and positioning them among other bioenergies, this work mainly aims at reviewing and comparing the different methods developed in order to produce a tar-free biosyngas. In this way, biosyngas quality improvement can be obtained through different operating processes such as reactor designs, gasifying ratios, feedstock, temperature, and space ratio. Since catalytic destruction has proved to be one of the most convenient and efficient ways to eliminate undesirable tars, an important part of this work also highlights the catalytic and deactivating phenomena involved. Furthermore, this work takes inventory of numerous studies conducted to understand the influence of different properties, especially supports and active site compositions, on the tar reforming activities and lifetime of catalyst materials. Thus, this review aims at summarizing basic and more recent improvements applied to biomass gasification processes and catalytic syngas purification.

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“…NexTech developed a magnesium nickel silicate catalyst that was tolerant to 10-20 ppm H 2 S in the feed [11]. A nickel containing hydrotalcite dry reforming catalyst is described in US patent 6,953,488 [12] with 47% to 76% conversion of methane with a "low concentration of H 2 S in the feed," but no results for steam reforming are presented.…”

mentioning

confidence: 99%

Advanced Syngas Upgrading Process for Conversion of Low-Rank Coals to Liquid Fuels

Lucero¹,

Goyal²,

McCabe³

et al. 2016

JGRE

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Syngas cleanup is a major challenge in any coal or biomass gasification application. A modified syngas cleanup process is under development to improve syngas from low rank coals for CTL (coal to liquids) applications. Novel steam reforming catalysts were developed to convert tars and light hydrocarbons and decompose ammonia in the presence of syngas contaminants such as H 2 S (< 500 ppm). Process goals are to improve syngas yield and H 2 :CO ratio while reducing water gas shift and downstream gas cleanup requirements. Laboratory reforming experiments were focused on developing information to support a techno-economic analysis using TRIG (transport reactor integrated gasifiers) or LURGI gasifiers. A CTL with carbon capture model was developed to compare the economics of the new process including the catalytic steam reforming to DOE (Department of Energy) baseline CTL. Reforming catalysts were developed that had high methane, tar, and ammonia conversion in presence of 90 ppm H 2 S. Higher concentrations of H 2 S affected conversion of methane but catalyst performance was fairly stable for the duration of testing. Results of modeling indicated that economics of the new process were nearly identical to the baseline CTL case, but greenhouse gas emissions for a given production of fuels were approximately 50% lower.

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Sulfur Tolerant Magnesium Nickel Silicate Catalyst for Reforming of Biomass Gasification Products to Syngas

Cited by 11 publications

References 41 publications

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming

Overview and Essentials of Biomass Gasification Technologies and Their Catalytic Cleaning Methods

Advanced Syngas Upgrading Process for Conversion of Low-Rank Coals to Liquid Fuels

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Sulfur Tolerant Magnesium Nickel Silicate Catalyst for Reforming of Biomass Gasification Products to Syngas

Cited by 11 publications

References 41 publications

H2S poisoning of NiAl2O4/Al2O3‐YSZ catalyst during methane dry reforming

H2S poisoning of NiAl2O4/Al2O3‐YSZ catalyst during methane dry reforming

Overview and Essentials of Biomass Gasification Technologies and Their Catalytic Cleaning Methods

Advanced Syngas Upgrading Process for Conversion of Low-Rank Coals to Liquid Fuels

Contact Info

Product

Resources

About

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming

H₂S poisoning of NiAl₂O₄/Al₂O₃‐YSZ catalyst during methane dry reforming