Search results for: Hou-min Chang

Items from 1 to 20 out of 48 results

article

An economic analysis of bamboo plantations and feedstock delivered cost in the Southern US for the manufacturing of fiber‐based bioproducts

Keren A. Vivas, Ramon E. Vera, Richard B. Phillips, Naycari Forfora, more

Biofuels, Bioproducts and Biorefining > 18 > 5 > 1455 - 1474

Bamboo, recognized for its rapid growth, high yield, and fiber performance is prominent in the fiber‐based bioproduct industry. However, the absence of US industrial bamboo plantations for fiber production necessitates reliance on imports or locally manufactured products using imported bamboo fibers, predominantly from China. This study evaluates the economic viability of cultivating bamboo in the...

article

Techno‐economic analysis of hemicellulose extraction from different types of lignocellulosic feedstocks and strategies for cost optimization

Wenhui Geng, Richard A. Venditti, Joel J. Pawlak, Tiago De Assis, more

Biofuels, Bioproducts and Biorefining > 14 > 2 > 225 - 241

Hemicellulose is a polymer found abundantly in lignocellulosic feedstocks, with many potential market applications. However, there has yet to be a large‐scale commercial process to isolate hemicellulose from lignocellulosic biomass. A techno‐economic assessment for hemicellulose extraction from sugarcane bagasse, switchgrass, and poplar was made. Two isolation processes after alkaline extraction were...

article

The influence of lignin content and structure on hemicellulose alkaline extraction for non-wood and hardwood lignocellulosic biomass

Wenhui Geng, Robert Narron, Xiao Jiang, Joel J. Pawlak, more

Cellulose > 2019 > 26 > 5 > 3219-3230

The extractability of hemicellulose from different lignocellulosics depends on the source of biomass. Differences in hemicellulose extractability are believed to be due to plant-specific hemicellulose arrangement alongside lignin within the cell wall. In this research, six biomasses were used to probe hemicellulose alkaline extractability as a function of the native lignin within the biomasses. Quantitative...

article

Enhanced furfural production from raw corn stover employing a novel heterogeneous acid catalyst

Wenzhi Li, Yuanshuai Zhu, Yijuan Lu, Qiyu Liu, more

Bioresource Technology > 2017 > 245 > PA > 258-265

With the aim to enhance the direct conversion of raw corn stover into furfural, a promising approach was proposed employing a novel heterogeneous strong acid catalyst (SC-CaC_t-700) in different solvents. The novel catalyst was characterized by elemental analysis, N₂ adsorption-desorption, FT-IR, XPS, TEM and SEM. The developed catalytic system demonstrated superior efficacy for furfural production...

article

Liquefaction of kraft lignin by hydrocracking with simultaneous use of a novel dual acid-base catalyst and a hydrogenation catalyst

Jindong Wang, Wenzhi Li, Huizhen Wang, Qiaozhi Ma, more

Bioresource Technology > 2017 > 243 > C > 100-106

In this study, a novel catalyst, S₂O₈²⁻-KNO₃/TiO₂, which has active acidic and basic sites, was prepared and used in lignin hydrocracking with a co-catalyst, Ru/C. Ru/C is an efficient hydrogenation catalyst and S₂O₈²⁻-KNO₃/TiO₂ is a dual catalyst, which could efficiently degrade lignin. This catalytic hydrogenation system can reduce solid products to less than 1%, while giving a high liquid product...

article

Comparison of One-Stage Batch and Fed-Batch Enzymatic Hydrolysis of Pretreated Hardwood for the Production of Biosugar

Liang He, Qiang Han, Hasan Jameel, Hou-min Chang, more

Applied Biochemistry and Biotechnology > 2018 > 184 > 4 > 1441-1452

Fed-batch method has shown a great promise in debottlenecking the high-solid enzymatic hydrolysis for the commercialization of cellulosic biosugar conversion for biofuel/biochemical production. To further improve enzymatic hydrolysis efficiency at high solid loading, fed-batch methods of green liquor-pretreated hardwood were performed to evaluate their effects on sugar recovery by comparing with one-stage...

article

Lignocentric analysis of a carbohydrate-producing lignocellulosic biorefinery process

Robert H. Narron, Qiang Han, Sunkyu Park, Hou-min Chang, more

Bioresource Technology > 2017 > 241 > C > 857-867

A biologically-based lignocellulosic biorefinery process for obtaining carbohydrates from raw biomass was investigated across six diverse biomasses (three hardwoods & three nonwoods) for the purpose of decoding lignin’s influence on sugar production. Acknowledging that lignin could positively alter the economics of an entire process if valorized appropriately, we sought to correlate the chemical...

article

A two-stage pretreatment process using dilute hydrochloric acid followed by Fenton oxidation to improve sugar recovery from corn stover

Wenzhi Li, Qiyu Liu, Qiaozhi Ma, Tingwei Zhang, more

Bioresource Technology > 2016 > 219 > C > 753-756

A two-stage pretreatment process is proposed in this research in order to improve sugar recovery from corn stover. In the proposed process, corn stover is hydrolyzed by dilute hydrochloric acid to recover xylose, which is followed by a Fenton reagent oxidation to remove lignin. 0.7wt% dilute hydrochloric acid is applied in the first stage pretreatment at 120°C for 40min, resulting in 81.0% xylose...

article

Novel process for the coproduction of xylo-oligosaccharides, fermentable sugars, and lignosulfonates from hardwood

Caoxing Huang, Ben Jeuck, Jing Du, Qiang Yong, more

Bioresource Technology > 2016 > 219 > C > 600-607

Many biorefineries have not been commercialized due to poor economic returns from final products. In this work, a novel process has been developed to coproduce valuable sugars, xylo-oligosaccharides, and lignosulfonates from hardwood. The modified process includes a mild autohydrolysis pretreatment, which enables for the recovery of the xylo-oligosaccharides in auto-hydrolysate. Following enzymatic...

article

Engineering physical and chemical properties of softwood kraft lignin by fatty acid substitution

Siddhesh N. Pawar, Richard A. Venditti, Hasan Jameel, Hou-Min Chang, more

Industrial Crops and Products > 2016 > 89 > C > 128-134

A process to attach fatty acids to lignin is reported which alters its thermal behavior. By attaching saturated C₁₈ fatty acids to OH groups, stable lignin stearates (LS) of controllable degrees of substitution (DS) were synthesized. Interesting physical properties were observed, wherein LS was observed to melt and flow at temperatures as low as 50°C. Melting was possible due to the crystallization...

article

Coproduction of Ethanol and Lignosulfonate From Moso Bamboo Residues by Fermentation and Sulfomethylation

Caoxing Huang, Juan He, Hou-min Chang, Hasan Jameel, more

Waste and Biomass Valorization > 2017 > 8 > 3 > 965-974

A novel integrated process to coproduce bioethanol and lignosulfonate from bamboo residues was investigated. Explicitly, the fermentable sugars (glucose and xylose) were saccharified from the kraft pulped bamboo residues with 12 % effective alkaline charge, followed by a sequential fermentation strategy was applied to produce bio-ethanol from these fermentable sugars. The kraft lignin (KL) generated...

article

Pretreatment of corn stover for sugar production using a two-stage dilute acid followed by wet-milling pretreatment process

Qiyu Liu, Wenzhi Li, Qiaozhi Ma, Shengxin An, more

Bioresource Technology > 2016 > 211 > C > 435-442

A two-stage process was evaluated to increase sugar recovery. Firstly, corn stover was treated with dilute hydrochloric acid to recover the xylose, and then the residue was subjected to a wet-milling pretreatment. Dilute hydrochloric acid showed a high xylose recovery during the first stage. The optimal condition was 120°C and 40min for 0.7wt% dilute hydrochloric acid pretreatment followed by wet-milling...

article

Catalytic conversion of xylose and corn stalk into furfural over carbon solid acid catalyst in γ-valerolactone

Tingwei Zhang, Wenzhi Li, Zhiping Xu, Qiyu Liu, more

Bioresource Technology > 2016 > 209 > C > 108-114

A novel carbon solid acid catalyst was synthesized by the sulfonation of carbonaceous material which was prepared by carbonization of sucrose using 4-BDS as a sulfonating agent. TEM, N₂ adsorption–desorption, elemental analysis, XPS and FT-IR were used to characterize the catalyst. Then, the catalyst was applied for the conversion of xylose and corn stalk into furfural in GVL. The influence of the...

article

Biomass pretreatments capable of enabling lignin valorization in a biorefinery process

Robert H Narron, Hoyong Kim, Hou-min Chang, Hasan Jameel, more

Current Opinion in Biotechnology > 2016 > 38 > C > 39-46

Recent techno-economic studies of proposed lignocellulosic biorefineries have concluded that creating value from lignin will assist realization of biomass utilization into valuable fuels, chemicals, and materials due to co-valorization and the new revenues beyond carbohydrates. The pretreatment step within a biorefinery process is essential for recovering carbohydrates, but different techniques and...

article

Conversion of corn stalk into furfural using a novel heterogeneous strong acid catalyst in γ-valerolactone

Zhiping Xu, Wenzhi Li, Zhijie Du, Hao Wu, more

Bioresource Technology > 2015 > 198 > C > 764-771

A novel solid acid catalyst was prepared by the copolymerization of p-toluenesulfonic acid and paraformaldehyde and then characterized by FT-IR, TG/DTG, HRTEM and N₂-BET. Furfural was successfully produced by the dehydration of xylose and xylan using the novel catalyst in γ-valerolactone. This investigation focused on effects of various reaction conditions including solvent, acid catalyst, reaction...

article

Production of fermentable sugars from sugarcane bagasse by enzymatic hydrolysis after autohydrolysis and mechanical refining

Larisse Aparecida Ribas Batalha, Qiang Han, Hasan Jameel, Hou-min Chang, more

Bioresource Technology > 2015 > 180 > C > 97-105

The autohydrolysis process has been considered a simple, low-cost and environmental friendly technology for generation of sugars from biomass. In order to improve accessibility of enzymes during enzymatic hydrolysis as well as to allow the recovery of hemicellulose in the filtrate, the sugarcane bagasse was pretreated using autohydrolysis followed by a mechanical refining process. The autohydrolysis...

article

Wood characteristics and enzymatic saccharification efficiency of field-grown transgenic black cottonwood with altered lignin content and structure

Zhouyang Xiang, Suman Kumar Sen, Aparna Roy, Douyong Min, more

Cellulose > 2015 > 22 > 1 > 683-693

The impact of field-grown transgenic trees on wood characteristics and enzymatic saccharification was evaluated. Genes 4CL and CAld5H were down regulated or overexpressed to modify the lignin content or structure (S/V ratio) on black cottonwood (Populus trichocarpa Nisqually-1). These transgenic trees were grown in the real environment and evaluated after 2 and 3 years. The results exhibited that...

article

Autohydrolysis Pretreatment of Waste Wheat Straw for Cellulosic Ethanol Production in a Co-located Straw Pulp Mill

Qiang Han, Yanbin Jin, Hasan Jameel, Hou-min Chang, more

Applied Biochemistry and Biotechnology > 2015 > 175 > 2 > 1193-1210

Waste wheat straw (WWS) is the waste product from feedstock preparation process in a straw pulp mill. It has a significant annual production rate and no commercial value has been explored on this material. In this study, waste wheat straw was pretreated using an autohydrolysis process followed by mechanical refining, and the pretreated materials were further enzymatically hydrolyzed to evaluate the...

article

Comparison of sodium carbonate–oxygen and sodium hydroxide–oxygen pretreatments on the chemical composition and enzymatic saccharification of wheat straw

Wenhui Geng, Ting Huang, Yongcan Jin, Junlong Song, more

Bioresource Technology > 2014 > 161 > Complete > 63-68

Pretreatment of wheat straw with a combination of sodium carbonate (Na ₂ CO ₃ ) or sodium hydroxide (NaOH) with oxygen (O ₂ ) 0.5MPa was evaluated for its delignification ability at relatively low temperature 110°C and for its effect on enzymatic hydrolysis efficiency. In the pretreatment, the increase of alkali charge (as Na ₂ O) up to 12% for Na ₂ CO ₃...

article

The influence of lignin–carbohydrate complexes on the cellulase-mediated saccharification I: Transgenic black cottonwood (western balsam poplar, California poplar) P. trichocarpa including the xylan down-regulated and the lignin down-regulated lines

Dou-yong Min, Quanzi Li, Vincent Chiang, Hasan Jameel, more

Fuel > 2014 > 119 > Complete > 207-213

The influence of the putative lignin–carbohydrate complexes (LCCs) on enzymatic saccharification was elucidated for the first time by examining two groups of transgenic black cottonwood (P. trichocarpa) comprised of the lignin down-regulated and the xylan down-regulated lines. Any adventitious contaminants that could affect the characterization of LCCs and the enzymatic saccharification were removed...

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INFONA - science communication portal

Search results for: Hou-min Chang

An economic analysis of bamboo plantations and feedstock delivered cost in the Southern US for the manufacturing of fiber‐based bioproducts

Techno‐economic analysis of hemicellulose extraction from different types of lignocellulosic feedstocks and strategies for cost optimization

The influence of lignin content and structure on hemicellulose alkaline extraction for non-wood and hardwood lignocellulosic biomass

Enhanced furfural production from raw corn stover employing a novel heterogeneous acid catalyst

Liquefaction of kraft lignin by hydrocracking with simultaneous use of a novel dual acid-base catalyst and a hydrogenation catalyst

Comparison of One-Stage Batch and Fed-Batch Enzymatic Hydrolysis of Pretreated Hardwood for the Production of Biosugar

Lignocentric analysis of a carbohydrate-producing lignocellulosic biorefinery process

A two-stage pretreatment process using dilute hydrochloric acid followed by Fenton oxidation to improve sugar recovery from corn stover

Novel process for the coproduction of xylo-oligosaccharides, fermentable sugars, and lignosulfonates from hardwood

Engineering physical and chemical properties of softwood kraft lignin by fatty acid substitution

Coproduction of Ethanol and Lignosulfonate From Moso Bamboo Residues by Fermentation and Sulfomethylation

Pretreatment of corn stover for sugar production using a two-stage dilute acid followed by wet-milling pretreatment process

Catalytic conversion of xylose and corn stalk into furfural over carbon solid acid catalyst in γ-valerolactone

Biomass pretreatments capable of enabling lignin valorization in a biorefinery process

Conversion of corn stalk into furfural using a novel heterogeneous strong acid catalyst in γ-valerolactone

Production of fermentable sugars from sugarcane bagasse by enzymatic hydrolysis after autohydrolysis and mechanical refining

Wood characteristics and enzymatic saccharification efficiency of field-grown transgenic black cottonwood with altered lignin content and structure

Autohydrolysis Pretreatment of Waste Wheat Straw for Cellulosic Ethanol Production in a Co-located Straw Pulp Mill

Comparison of sodium carbonate–oxygen and sodium hydroxide–oxygen pretreatments on the chemical composition and enzymatic saccharification of wheat straw

The influence of lignin–carbohydrate complexes on the cellulase-mediated saccharification I: Transgenic black cottonwood (western balsam poplar, California poplar) P. trichocarpa including the xylan down-regulated and the lignin down-regulated lines

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