Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Vasireddy, Sivakumar; Morreale, Bryan D.; Cugini, A.V.; Song, Chunshan; Spivey, James J.

doi:10.1039/c0ee00097c

Cited by 321 publications

(225 citation statements)

References 278 publications

(394 reference statements)

Supporting

Mentioning

209

Contrasting

Unclassified

Order By: Relevance

“…Though feasible, the uncatalyzed hydrogenation of unsaturated hydrocarbons, whose main application lies in industrial direct coal liquefaction processes, requires exceptionally harsh reaction conditions (400-500 o C, 150-300 atm H2) and, as a result, is highly unselective. [6] The selective uncatalyzed hydrogenation of styrene derivatives and polycyclic aromatic systems has also been achieved at high temperatures using transfer hydrogenation, with 9,10-dihydroanthracene as the H2-donor source, the reaction being driven by the re-aromatization of the sacrificial anthracene substrate. [7] More recently hydrazine was successfully used as H2-donor for the uncatalyzed, photodriven transfer hydrogenation of unactivated olefins under ambient conditions in air, with N2 being the sole by-product of the reaction.…”

mentioning

confidence: 99%

Uncatalyzed Hydrogenation of First‐Row Main Group Multiple Bonds

Arrowsmith

Böhnke

Braunschweig

et al. 2016

Chemistry A European J

103

109

View full text Add to dashboard Cite

Room temperature hydrogenation of an and a CAAC-supported diboracumulene 3,5, Since the pioneering work of Sabatier over a century ago [1] catalytic hydrogenation has become the most used reaction type in industrial chemical synthesis [2] and still constitutes one of the most active research areas in chemistry. While the vast majority of industrial hydrogenation processes are based on well-established heterogeneous late transition metal catalysts (Pt, Pt, Rh, Ru, Ni) [2] the last decade has seen a revival of the field with the advent of metal-free frustrated Lewis pair catalysts capable of activating H2 [4] and transfer hydrogenation [5] for the reduction of polar multiple bonds.

show abstract

mentioning

confidence: 99%

Uncatalyzed Hydrogenation of First‐Row Main Group Multiple Bonds

Arrowsmith

Böhnke

Braunschweig

et al. 2016

Chemistry A European J

103

109

View full text Add to dashboard Cite

show abstract

“…Pencairan batubara langsung adalah proses mengubah batubara padat menjadi bahan bakar cair dengan menambahkan hidrogen pada suhu dan tekanan yang tinggi dengan atau tanpa bantuan katalis (Vasireddy, 2011 FeS2 + H2  Fe1-x S + H2S (6) FeOOH + S +3/2 H2  Fe1-x S +2H2O…”

Section: B Pencairan Batubara Langsungunclassified

Pencairan Batubara Peringkat Rendah Papua Menggunakan Katalis Bijih Besi

Talla

Taba²

2017

J. Rekayasa Kim. Lingkung.

View full text Add to dashboard Cite

AbstrakTeknologi pencairan batubara yang rencana dikembangkan di Indonesia adalah pencairan batubara peringkat rendah yang menggunakan katalis. Menentukan katalis yang tepat dapat meningkatkan hasil konversi dan perolehan minyak. Konsep ini merupakan ide penelitian, dengan tujuan untuk mengivestigasi hasil konversi dan perolehan minyak batubara Papua dengan menggunakan katalis bijih besi. Batubara dicairkan dalam autoklaf 5 liter dengan katalis biji besi dan antrasen sebagai pelarutnya. Kondisi operasional terdiri dari suhu 400ºC dan waktu tunggu 60 menit. Hasil konversi ketiga sampel tanpa katalis hanya dalam kisaran 65,72-66,45%, sedangkan konversi dengan katalis bijih besi berkisar antara 88,63-89,94 % dan perolehan minyak antara 62,11-63,34 %. Hasil ini sekaligus menunjukkan kontribusi katalis bijih besi terhadap peningkatan konversi yang rata-rata mencapai 23,04 %.Kata kunci: pencairan batubara, peringkat rendah, bijih besi, konversi, minyak. AbstractThe coal liquefaction technology that the plan developed in Indonesia is low rank coal liquefaction using catalyst. Determining the right catalyst can improve the result of conversion and oil yield. This concept is research idea, with the aim to investigate the result of conversion and oil yield of Papua Coal by using iron ore catalyst. Coal is liquefied on the autoclave 5 liter with iron ore catalyst and antrasen as solvent. Operating conditions consist of temperature of 400ºC and holding time of 60 minutes. The result of conversion of the three samples without catalyst is only in the range of 65.72-66,45 %, whereas the conversion with iron ore catalysts ranged from 88.63-89.94 % and oil yield between 62.11-63,34%. This result also shows the contribution of iron ore catalyst to increase the conversions that averaged 23.04 %.

show abstract

“…1). The complete decarbonization of energy is believed to be the ultimate solution for the long-term sustainability, and thus over the past decades, considerable researches have been devoted to the development of low-carbon technologies covering nearly all forms of energy (Song, 2006;Li and Fan, 2008;Kumar et al, 2009;Panwar et al, 2011;Swain et al, 2011;Vasireddy et al, 2011;Chu and Majumdar, 2012;Shi et al, 2013;Sangeeta et al, 2014). Novel concepts and ideas for fossil, bio-, and renewable energies have emerged as depicted in Figure 1.…”

Section: Introduction Co 2 Capture and An Integrated Energy-chemical mentioning

confidence: 99%

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

et al. 2015

View full text Add to dashboard Cite

CO 2 capture represents the key technology for CO 2 reduction within the framework of CO 2 capture, utilization, and storage (CCUS). In fact, the implementation of CO 2 capture extends far beyond CCUS since it will link the CO 2 emission and recycling sectors, and when renewables are used to provide necessary energy input, CO 2 capture would enable a profitable zero-or even negative-emitting and integrated energy-chemical solution. To this end, highly efficient CO 2 capture technologies are needed, and adsorption using solid adsorbents has the potential to be one of the ideal options. Currently, the greatest challenge in this area is the development of adsorbents with high performance that balances a range of optimization-needed factors, those including costs, efficiency, and engineering feasibility. In this review, recent advances on the development of carbon-based and immobilized organic amines-based CO 2 adsorbents are summarized, the selection of these particular categories of materials is because they are among the most developed low-temperature (<100°C) CO 2 adsorbents up to date, which showed important potential for practical deployment at pilot-scale in the near future. Preparation protocols, adsorption behaviors as well as pros and cons of each type of the adsorbents are presented, it was concluded that encouraging results have been achieved already, however, the development of more effective adsorbents for CO 2 capture remains challenging and further innovations in the design and synthesis of adsorbents are needed.Keywords: CCUS, CO 2 capture, adsorption, energy, material science INTRODUCTION CO 2 CAPTURE AND AN INTEGRATED ENERGY-CHEMICAL SOLUTIONThe atmospheric CO 2 concentration now exceeds 400 ppm (CO2Now.org, 2014), and its continuous increase is believed to be the major factor leading to global warming and climatic change (Crowley, 2000;Held and Soden, 2000;Patz et al., 2005). Kaya et al. and Hoffert et al. have quantified net CO 2 emissions in terms of population, economic activity, and energy-related factors using Eq. 1 (Kaya, 1995;Hoffert et al., 1998).where C is the net CO 2 emission, P is population, GDP is the gross domestic product that is used here as an indicator of economyrelated factor, and E is energy production. Therefore, GDP/P is the Per capita GDP, and E/GDP can be regarded as the energy intensity during production that is closely related to the efficiency of energy utilization. The last term, C/E, represents the carbon intensity during energy production. As for the development of the human society and life quality, it is improper to limit population and production, which means there is no solution to CO 2 reduction from the first and second term in Eq. 1. On the other hand, increase in the energy production/utilization efficiency and control of the carbon footprint during energy processes are the major strategies for CO 2 sequestration (third and fourth term in Eq. 1). The complete decarbonization of energy is believed to be the ultimate solution for the long-term sustainability, ...

show abstract

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

Cited by 321 publications

References 278 publications

Uncatalyzed Hydrogenation of First‐Row Main Group Multiple Bonds

Uncatalyzed Hydrogenation of First‐Row Main Group Multiple Bonds

Pencairan Batubara Peringkat Rendah Papua Menggunakan Katalis Bijih Besi

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

Contact Info

Product

Resources

About